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# Mammoth Weather

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- [Wrapping up November on a mostly dry note then increasingly stormy conditions months end into early December.....](https://mammothweather.com/2023/11/25/wrapping-up-november-on-a-dry-note-then-increasingly-stormy-conditions-possible-as-we-get-into-december/) - It been a dry chilly weekend in Mammoth and the Dweebs expect some increase in daytime warmth through Tuesday. The current upper trough is still shifting east and weakening while the upper high over BC will weaken while heading into the Pacific NW next few days. Highs in Mammoth will warm some through Tuesday, before
- [Friday the 24th....Colder Weather over the weekend and into early next week.....Slight chance of showers Wednesday......](https://mammothweather.com/2023/11/24/friday-the-24th-colder-weather-over-the-weekend-and-into-early-next-week-slight-chance-of-showers-wednesday/) - No way against it. Its cold in Mammoth and it will stay this week at least into Sunday. Latest GFS 12z Global model height anomalies has a Cold Great Basin Low over Southern Nevada this AM, shifting east the next couple of days. Temps will come up a bit early next week. So a cold
- [Good Day Eastern Sierra....after a couple of cool showery days...were in for a dry period through months end with variable temps....](https://mammothweather.com/2023/11/20/good-day-eastern-sierra-after-a-couple-of-cool-showery-days-were-in-for-a-dry-period-through-months-end-with-variable-temps/) - It looks like a dry period setting up in Mammoth the rest of the month. Milder temps are expected through this upcoming mid week then cooler weather beginning Thursday into the weekend. A dry cold front arrives to the region Thanksgiving. Cooler temperatures and increased breezes will accompany the frontal passage. Dry conditions with below
- [Expect a dry mild weekend following by the possibility of precipitation by mid week....A change coming in the models for next week sheds a question on whether Mammoth will get any signifacant snow next week.  More time is needed to know](https://mammothweather.com/2023/11/09/dry-mild-weekend-following-by-the-possibility-of-precipitation-by-mid-week-a-change-coming-in-the-models-for-next-week-sheds-a-question-on-whether-mammoth-will-get-any-signifacant-snow-next-week/) - 11/18/2023 Looks like some good precip amounts later today and through the night tonight. Some area will get larger storms but who? Anyway, over the crest, good frontal precip is possible with some areas receiving over a foot of snow. Most Elevations at 7500 to 8000 feet will get 3 to 6+ inches and within
- [Weather Update the end of October.....](https://mammothweather.com/2023/10/28/weather-update-the-end-of-october/) - Mammoth Lakes; After a rather chilly weekend due to a chilly trof of low pressure and Northeast winds ending by Sunday. The highs that has peaked out only the 40s Today and lows in the teens and twenties, will follow up with the warming trend next week. This warming trend will bring temps back to
- [Warm Weekend Shaping Up then cooler mid week next week.](https://mammothweather.com/2023/10/04/warm-weekend-shaping-up-then-cooler-mid-week-next-week/) - A shift in the pattern to a warmer one develops this week as a large scale ridge now out 1500mi shifts east into the state this weekend. However, this ridge is quite progressive, and well be well east of us into the Rockies by Tuesday. Expect highs well into thr 80s in Bishop and low
- [Stationary Pacific NW Trof to remain anchored this week with cooler weather going into the Weekend. Chance of showers Friday Night into Saturday Night...](https://mammothweather.com/2023/09/25/stationary-pacific-nw-trof-to-remain-anchored-this-week-with-cooler-weather-going-into-the-weekend-chance-of-showers-friday-night-into-saturday-night/) - As the firsts days of Fall have emerged, It will be dry but breezy today over the crest with just some light breezes in town. Expect highs in the low 60s today then back up to near 70 by Wednesday. The persistant Trof in the NW will hold off moving through until about 1st or
- [Last Dweeb Report of the Summer.....Fall Arrives this Friday night at 11:50PM....Chilly....Breezy Weather more often than not through Early October in outlook..](https://mammothweather.com/2023/09/21/last-dweeb-report-of-the-summer-fall-arrives-this-friday-night-at-1150pm-chilly-breezy-weather-more-often-than-not-through-early-october-in-outlook/) - Its been a Summer with cooler then normal temps over all which is now coming to an end....Enjoy the last almost full day of Summer Friday! Our weather pattern is showing a shift now to even more long wave trofing than during the Summer. With this strong El Nino in place, no telling how it
- [Expect Unsettled Weather this Weekend then Dry WX next week with temps more seasonal again....](https://mammothweather.com/2023/09/01/expect-unsettled-weather-this-weekend-then-dry-wx-next-week-with-temps-more-seasonal-again/) - A breezy and cooler pattern will prevail across the Sierra and western Nevada over Labor Day weekend as an upper low remains parked across N.California. This will also yield a wetter pattern especially over the northern sierra with daily chances for showers and thunderstorms each day this weekend. Drier and warmer conditions will return next
- [Nice Quiet Weather the next 5 days with temps above seasonable levels, late in the weekend into early next week.....A Chance of Afternoon showers may return later next week into early September....](https://mammothweather.com/2023/08/24/nice-quiet-weather-the-next-5-days-with-temps-above-seasonable-levels-late-in-the-weekend-into-early-next-week-a-chance-of-afternoon-showers-may-return-later-next-week-into-early-september/) - 8/28/2023 A slow cool down may begin tomorrow Tuesday in Mammoth, but definetly more cooling Wednesday into the weekend. Tuesdays highs will still be in the upper 70s but by the weekend, mid 60s looks likley. Lows at night now in the low 50s will cool to the 30s over the weekend. Winds later this
- [Significant Rains are possible Sunday into Tuesday from the remnants of Hurricane Hilary near the Coast of Baja. This is an unusual projection, as its timing is several weeks earlier than in 85 years...](https://mammothweather.com/2023/08/17/significant-rains-are-possible-sunday-into-tuesday-from-the-remnants-of-hurricane-hilary-near-the-coast-of-baja-this-is-an-unusual-projection-as-its-timing-is-several-weeks-earlier-than-in-75-years/) - 8-19-2023 Everything weatherwise is set for a major summertime tropical event over the southern third of the state. Moisture from Hilary is already moving into the extream Southern CA deserts, with it all moving northward through Monday night. It is getting help from an upper low off the coast of CA, to keep moisture
- [Seasonal Weather for Late July in order now with another heat spell set up begining the middle of next week....](https://mammothweather.com/2023/07/25/seasonal-weather-for-late-july-in-order-now-with-another-heat-spell-set-up-begining-the-middle-of-next-week/) - The Weather in Mammoth is now pretty seasonal with highs in the mid to upper 70s and lows 55 to 60. It will be a breezy week with troughing in the Pacific NW and our 4 corners continential high set up in its usual place. Highs in Mammoth this week will vary a bit. 75
- [Seasonal Weather has been the rule this weekend with afternoon breezes and temps within a few degrees of normal.....With the Subtropical high setting up just off the Southern California Coast, East through the 4 Corners States Thursday, expect a Toasty following weekend, and well beyond..](https://mammothweather.com/2023/07/08/seasonal-weather-has-been-the-rule-this-weekend-with-afternoon-breezes-and-temps-within-a-few-degrees-of-normal-with-the-subtropical-high-setting-up-just-off-the-southern-california-coast-thursday/) - The next 2 to 3 days still looks seasonal with lows in the 40s and highs in the mid 70s in town. Another note with this trof is that there will be lots of wind in the afternoon, especially later in the day and evenings. Sunday night lows continuing in 40s with wind gusts possibe
- [Cool Spring Weather into Summer coming to an end by the middle of the new week with Temps rising some 15 degrees above normal by next weekend!](https://mammothweather.com/2023/06/24/cool-spring-weather-into-summer-coming-to-an-end-by-the-middle-of-the-new-week-with-temps-rising-some-15-degrees-above-normal-by-next-weekend/) - Its been a long cold winter, spring and even into early summer this year. Our week two weather charts show well above normal temps for our area, begining next weekend. Sensibly it will be noticed by next Wednesdy or Thursday. I expected highs in the low 100s in the Bishop area by Friday into the
- [Changes to warmer weather today and Saturday with wind and cooling Sunday into early next week...](https://mammothweather.com/2023/06/16/changes-to-warmer-weather-today-and-saturday-with-wind-and-cooling-sunday-into-early-next-week/) - Local weather to warm through Saturday with highs in the low 70s at 7500 to 8000 feet. Lows in the 30s and 40s. Sunday looks cooler and Breezy to windy! A deepening storm now over the Gulf of AK becomes a Canadian low by this Saturday, then pushes southward into the Western US by early
- [After a nice rain free Friday and Saturday, a chance of showers return to the Sierra Sunday with first half of next week having a better chance.....](https://mammothweather.com/2023/06/03/after-and-nice-rain-free-friday-and-saturday-chance-of-showers-return-to-the-sierra-sunday-with-next-week-have-a-better-chance/) - Please click on header above for better format Finally some warmer temps this weekend.... However, the overall pattern is still one that shows a split flow pattern over the Eastern Pacific, as an excessive wave length exists from the central pacific trof/ridge pattern to the strong high pressure system dominating Central Canada.
- [Strong Ridging just off the West Coast is forcing an elongated Trof in the upper levels over CA and Western NV with cooler showery WX Thursday and Friday....El Nino out over the EQ pacific will be perking up later this Summer...](https://mammothweather.com/2023/05/24/strong-ridging-just-off-the-west-coast-is-forcing-an-elongated-trof-in-the-upper-levels-over-ca-and-western-nv-with-cooler-showery-wx-thursday-and-friday-el-nino-out-over-the-eq-pacific-will-be-per/) - The Strong off shore upper ridge has set up some strong upper troughing over CA and Western NV. Although Southern Mono Clounty should be spaired today from major rains....The upper forcing should shift south Thursday into Friday with better action for the Mammoth and June areas. Expect showers and Thunder with even the sierra crest
- [Warming Trend to continue through Saturday.....Southerly Flow and impulses from the SSE will increase chances of Showers this weekend then cooler drier air expected early to mid following week...](https://mammothweather.com/2023/05/17/warming-trend-to-continue-through-saturday-southerly-flow-and-impulses-from-the-sse-will-increase-chances-of-showers-this-weekend-then-cooler-drier-air-expected-early-to-mid-following-week/) - It was a beautiful morning in the Mammoth Lakes today. Still a deep snowpack at elevations at and above 8500 feet. This snowpack will inhibit surface convection, however, there will be an increase in mid to upper level forcing, in the high country this weekend, and a better chance of rainfall. Our freezing level is
- [Definetly a Warmer Weekend setting up as High Pressure Builds over Western Canada. In time, a cut off low develops over Northern California adding to unstable air and presenting the chance of some showers, mainly later next week.  The Dweebs do not expect any snowfall on Mammoth Mtn as freezing level 13K....El Nino continues to develop with prospects for at least a moderate event with lower chances of a major event..](https://mammothweather.com/2023/05/12/definetly-a-warmer-weekend-setting-up-as-high-pressure-builds-over-the-far-west-in-time-a-cut-off-low-develops-over-northern-california-adding-to-unstable-air-and-presenting-the-chance-of-some-showe/) - Strong upper ridging is building north over CA and temps will rise to the low 60s in Mammoth this weekend, then mid to upper 60s later next week. Run off conditions once again will be brisk into next week. Strong positive phase PNA pattern is developing as well; very El Nino like. Enjoy the warmer
- [Chilly Unsettled period setting up for the Sierra next week......A real oppertunity to break 875 inch snowfall record on top of Mammoth Mt.....A Record that is little chatted about but Monumental....](https://mammothweather.com/2023/04/30/chilly-unsettled-period-setting-up-for-the-sierra-next-week-a-real-oppertunity-to-break-875-inch-snowfall-record-on-top-of-mammoth-mt-a-record-that-is-little-chatted-about-but-momumental/) - After near record high temperatures this week, the warm upper high is currently shifting east....500Mb Heights are falling, cooling is occuring in the coastal cities of Northern CA and breezy weather has returned. Being that the Sun angle is now mid August like, surface convection will occur where ever possible, except over snowcover. The closed
- [Milder days ahead this weekend through next week as the Sierra Thaw resumes...  Next chance for unsettled weather seems to be in early May....](https://mammothweather.com/2023/04/19/milder-days-ahead-this-weekend-through-next-week-as-the-sierra-thaw-resumes-next-chance-for-unsettled-weather-seems-to-be-about-the-end-of-the-month/) - 4/23/2023 It was a beautiful weekend in the high country. High temperatures in town were in the low 50s and lows in the 30s. It was a bit breezy as expected. The thaw was in full swing with Mid August like Sun. In that the snowpack remains very deep and wide spread, surface enhanced convection
- [After a chilly Thursday, a warmup is expected over the weekend before another spring trough visits our area early next week.....No major storms on the horizon.........](https://mammothweather.com/2023/04/13/after-a-chilly-thursday-a-warmup-is-expected-over-the-weekend-before-another-spring-trough-visits-our-area-early-next-week-no-major-storms-on-the-horizon/) - 4/14/2023 Global models this AM continuing to forecast periods of warming, cooling, periods of wind and periods of snow showers for Mono County the next few weeks. No major snow producing storms are in the forecast for Mono County. Thursday’s weather system is now in the Rockies and high pressure aloft is building in today
- [The Great Winter of 2023 continues to wind down....Storms will mainly benifit the Pacific NW....Milder weather ahead....](https://mammothweather.com/2023/04/06/the-great-winter-of-2023-continues-to-wind-down-storms-will-mainly-benifit-the-pacific-nw-milder-weather-ahead/) - 4:15PM 4/6/2023 New Update from DWP on the Snow Course Survey. The snow course is an average of 10 points over about 100 yards (one of which is next to the snow pillow) and the average of those 10 points is 104.7 inches of SWE. Comment: So for the record, the update says, that the
- [Cold Unsettled Pattern Underway....Light accumulations into tonight...Strong Winds....Moderating Temps Wednesday....Easter weekend very nice with above normal Temps.....Progressive Pattern continues the following week...](https://mammothweather.com/2023/04/03/cold-unsettled-pattern-underway-light-accumulations-into-tonight-strong-winds-moderating-temps-wednesday-easter-weekend-very-nice-with-above-normal-temps-progressive-pattern-continues-t/) - 4/5/2023 Historic Water Content On The Pass 102.7 247% of normal. - 16% greater than the Winter of 1969 (86.5). The Southern Sierra is 305% of normal; April 1st Historic WInter by a long shot! The Winter of 2023 beats them all here in Mammoth Lakes According the DWP; the following in order, are
- [Winter of 2023 drawing to close......It's been a very good year for the California Drought!](https://mammothweather.com/2023/03/30/winter-of-2023-drawing-to-close-its-been-a-very-good-year-for-the-california-drought/) - 3/31/2023 Turn on the lights....The Train of Winter Storms are over!! Latest guidence shows a much weaker storm for Sunday night through mid-week with mostly wind and snow showers for the high country. Snowfall amounts 1 to 3 inches in Mammoth Monday through Tuesday. It will be noted that this is a windy pattern for
- [Its a Beautiful Spring Blue Bird Day Today!  Next Weather system is slowing down a bit and may not begin to bring Snowfall until late AM......  A few more storms are in the future....](https://mammothweather.com/2023/03/27/its-a-beautiful-spring-blue-bird-day-today-next-weather-system-is-slowing-down-a-bit-and-may-not-begin-to-bring-snowfall-until-late-am-a-few-more-storms-are-in-the-future/) - 3/28/23 Update from the CPC this afternoon: Following a robust Madden Julian Oscillation (MJO) across the Western Hemisphere earlier in March, the intraseasonal signal has since weakened as it moved over the Indian Ocean during the past week. The GEFS and ECMWF dynamical model ensembles are in good agreement regarding a weakened
- [Next Moderate Weather System to bring 10 to 18 inches of snow to our Town and 2 feet plus over Mammoth Mt....Important changes are taking place in the models now with possibly drier warmer weather developing by the 8th of April........](https://mammothweather.com/2023/03/25/next-moderate-weather-system-to-bring-10-to-18-inches-of-snow-to-our-town-and-2-feet-plus-over-mammoth-mt-important-changes-are-taking-place-in-the-models-now-with-possibly-drier-warmer-weather-dev/) - Although another Moderate storm is headed for the Town of Mammoth, There are encourging developments in the Week 2 Progs showing retrogression of the long wave Trof westward and upper ridging developing over the far west mainly April 6th on. This, if correct will give us a nice break from storms after the system on
- [It's Official...Biggest Winter already for April 1st of all time....Winter Storm Warning in effect now through Wednesday AM.....Cold Breezy Weekend expected...](https://mammothweather.com/2023/03/21/its-official-biggest-winter-already-for-april-1st-of-all-time-winter-storm-warning-in-effect-now-through-wednesday-am-cold-breezy-weekend-expected/) - 3-22-2023 The remains of the low pressure system that brought 18 inches of snow to the Main Lodge yesterday is moving out today. The storm total from last Sunday and Tuesday on Mammoth Mt was 34 inches. Both of these systems were all part of the same storm with the 1st part, the warm sector
- [Next weather system is slowing down a bit coming onshore between Monterey Bay and San Jose.....Southern Sierra in Bullseye...with Mammoth Somewhat lesser amounts.....Cold Chilly Breezy Weekend with snow showers possible....Next storm about the 28th....](https://mammothweather.com/2023/03/20/next-weather-system-is-slowing-down-a-bit-coming-onshore-between-monterey-bay-and-san-jose-southern-sierra-in-bullseye-with-mammoth-somewhat-lesser-amounts-cold-chilly-breezy-weekend-with-sn/) - Spring arrives at 2:24PM today the 20th! Last nights snowfall forecast was a bust with only 2 to 4 inches. Anyone complaining? Today Monday looks beautiful but very breezy over the higher elevations. Highs today will be in the 30s.. The forecast for more snowfall is still in for this Tuesday and Wednesday with another
- [Weak Subtropical Tap into the Sierra now with overall good snowfall amounts over the next 4 days.....Colder showery unsettled weather the remainder of the week......](https://mammothweather.com/2023/03/19/weak-subtropical-tap-into-the-sierra-now-with-overall-good-snowfall-amounts-over-the-next-4-days-colder-showery-unsettled-weather-the-remainder-of-the-week/) - Sunday Night 10:30PM (Please click on the title above for the correct format) Tonight's update for snowfall at the village through Wednesday (This is based upon the point forecast from the NWS at 8000) Sunday NGT through 5:00AM Monday 7 to 11 inches Monday
- [The Prospects for another AR are once again diminished.....However, Pattern to remain active over the next one to two weeks......](https://mammothweather.com/2023/03/17/the-prospects-for-another-ar-are-once-again-diminished-however-pattern-to-remain-active-over-the-next-one-to-two-weeks/) - The weather maps are once again back peddling on the early next week AR. As I mentioned earlier this week, the EAJ has retreated and will have little influence on west coast weather very soon....This next AR stream does not appear to be strong on shore and is further south. todays hype in the news
- [Bi-Generational Mammoth Pass Record close to be broken....1983 record has stood for 40 years......AR winding down as coast to coast upper East Asian Jet no more....Still....Several storms will bring more snowfall to the high county through months end......](https://mammothweather.com/2023/03/14/bi-generational-mammoth-pass-record-close-to-be-broken-1983-record-has-stood-for-40-years-ar-winding-down-as-coast-to-coast-upper-east-asian-jet-no-more-still-several-storms-will-bring-m/) - 10:30AM 3-16-2023 PS Double click on the title to get formatted discussion Its Mid March, the Sun is higher in the sky. The days are longer, but Winter is still hanging on! After a couple of Atmospheric Rivers, it appears that we are going to get one more Monday night and Tuesday. The storm
- [MJO Tropical Forcing is ending as Classic Anti Cyclone is dissipating over the North Pacific....Like a two mile long freight Train.....It will take time to slow down.....Mother nature takes her foot off the gas peddle and the extension of the EAJ pulls back later this week......](https://mammothweather.com/2023/03/12/mjo-tropical-forcing-is-ending-as-classic-anti-cyclone-is-dissipating-over-the-north-pacific-like-a-two-mile-long-freight-train-it-will-take-time-to-slow-down-mother-nature-takes-her-foot-o/) - 3/14/2023 9:00AM (Click on Title to get formatted discussion) Bishop picked up 2.31 inches storm total; Looking forward to the DWP update!! :-) Mammoth Mt at the base lodge reported 60 inches, upper mountain possibly picked up 7+ feet as it was colder. The Town got a few feet of Sierra Slop. The
- [Old Upper Low off the Oregon Coast gets the Boot in Wednesday...Temperatures finally become milder Thursday as pacific air invades.....Scripps has AR a Cat 4 for Friday......Pattern next week a bit more dubious this afternoon.....](https://mammothweather.com/2023/03/07/old-upper-low-off-the-or-coast-get-the-boot-in-wednesday-temperatures-finally-become-milder-thursday-as-pacific-air-invades-scripps-has-ar-a-cat-4-for-friday-pattern-next-week-a-bit-more-du/) - 3-9-2023 Quick update; AR has moved on shore over the Bay Area. It should begin to snow later this afternoon. The NWS Point Forecast for the Town of Mammoth at 8000 feet, forecasts between 2.5 to 4.5 feet by Sunday. Mammoth Mt above 9,000 feet "Point Forecast" is 6.5 to 9.5 feet by the same
- [Cold Storm to continue snowfall Sunday with moderate to heavy amounts.....Unsettled Weather will hang around through mid week......MJO continues to Crank and is now Modulating the Westerlies......Extension of East Asian Jet now Probable.....1st AR expected about next Friday for the Sierra.....](https://mammothweather.com/2023/03/05/cold-storm-to-continue-snowfall-sunday-with-moderate-to-heavy-amounts-unsettled-weather-will-hang-around-through-mid-week-mjo-continues-to-crank-and-now-modulating-westerlies-with-extension-o/) - The Dweebs were eagerly awaited the new 12Z run of the GFS this morning to see if there was consensus with the European model that turned bullish on a series of AR's to Affect CA beginning next weekend. Indeed it has... I will post below. Scripps just sent out an advisory stating that within the
- [After a couple of Beautiful Days...Another Winter Storm is on the way.....Still no confidence in the Week 2 Outlook yet!!](https://mammothweather.com/2023/03/03/after-a-couple-of-beautiful-days-another-winter-storm-is-on-the-way-still-no-confidence-in-the-week-2-outlook-yet/) - 3/4/23 Current storm will linger longer over California and it seems to have a better fetch with its over water trajectory. The Storm for the resort levels will be stronger with more snowfall than earlier forecasted. Snowfall amounts will be 2 to 3 feet in the Town of Mammoth with 3 to 4 feet possible
- [Storm system winds down with snow showers today and partly cloudy Sky's the next few days....Next storm becomes stationary Saturday night into next week with moderate amounts of Snowfall expected......The Week 2 Outlook still shows the East Asian Jet Progged to reach California the following weekend....](https://mammothweather.com/2023/03/01/storm-system-winds-down-with-snow-showers-today-and-partly-cloudy-skys-the-next-few-days-next-storm-becomes-stationary-saturday-night-into-next-week-with-moderate-amounts-of-snowfall-expected/) - >3/2/2023 Apparently, the (CPC) "Climatic Prediction Center" is "going for it" in their discussion today in regards to a pattern that can extend an "AR/Rs" to CA. I will wait a few more days to see if the European deterministic runs show the same. Read Below: 6-10 DAY OUTLOOK FOR MAR 08
- [Major Winter Snow Storm in Play...Break on Sunday with another Sunday Night into Tuesday Night.....Pattern Change is expected next weekend.....](https://mammothweather.com/2023/02/24/major-winter-snow-storm-in-play-break-on-sunday-with-another-sunday-night-into-tuesday-night-pattern-change-is-expected-next-weekend/) - 2/26/23 Great News this AM....The Road is open to LA and most of All....The Sun is/was out! Snow forecasts were right on with 4 to 4.5 feet on Mammoth Mt storm total. Temperatures were warming up today with highs approaching freezing. That's a big difference compared to the past week!! The next and may
- [Arctic Air Now Entrenched in the High Country.....Very Cold Temps along with gusty winds and strong wind chills....  Strong Winter Storm will exit through So-Cal Saturday with important effects for Southern Cal and the Owens Valley.....](https://mammothweather.com/2023/02/22/arctic-air-now-entrenched-in-the-high-country-very-cold-temps-along-with-gusty-winds-and-strong-wind-chills-strong-winter-storm-will-exit-through-so-cal-saturday-with-important-affects-for-so/) - Our Next winter storm has decided to make a change in its original track. Earlier, the track was to kick east through Baja, Mex. Now it is forecasted to kick inland over Southern CA. The center of the low will be over the Channel Islands at 1:00PM Saturday and over the Mojave Desert Saturday Evening.
- [Enjoy one more day of 40s in Mammoth....More Arctic Air on the way for Tuesday Night through Friday as a repeat of the pattern earlier in the month expected...However with more over-water trajectory...... "Platinum Powder" Alert hoisted for Friday and Saturday.....](https://mammothweather.com/2023/02/20/enjoy-one-more-day-of-40s-in-mammoth-more-arctic-air-on-the-way-for-tuesday-night-through-friday-as-a-repeat-of-the-pattern-earlier-in-the-month-expected-platinum-powder-alert-hoisted-for-fr/) - 2/21/23 Lee Vining just flushed out of the fog at 9:40 AM as winds came up. Storms on track. Friday into Friday Night System will be biggest snowfall producer. GFS now has the Closed Low ejecting Through Southern CA instead of Baja Saturday afternoon and evening. This would create a Pattern of Upslope Saturday into
- [Milder Temps on the way for the weekend with considerable high clouds......MJO now in favored 7/8 RMM phase space for retrogression of East Pac Ridge....Retrogression showing up in Global Models now over North Central Pac beginning this Monday the 20th.....A stormy week to begin about the 21/22st....](https://mammothweather.com/2023/02/16/milder-temps-on-the-way-for-the-weekend-with-considerable-high-clouds-mjo-now-in-favored-7-8-rmm-phase-space-for-retrogression-of-east-pac-ridge-retrogression-showing-up-in-global-models-now-o/) - 2/18/23 Saturday AM Quick update; After a dry and milder weekend in the high country, the next active pattern will begin this Tuesday with increasing wind and the chance of light snow. Winds will be at least at advisory levels Tuesday night. This 1st storm is an Arctic Storm with once again "CPK" air from
- [Drier than normal weather will continue the next 1 to 2 weeks with cold inside and coastal sliders....Only light amounts of snowfall expected.......Next Retrogression of the Eastern Pacific Ridge not expected until about months end....](https://mammothweather.com/2023/02/11/drier-than-normal-weather-will-contine-the-next-1-to-2-weeks-with-cold-inside-and-coastal-sliders-only-light-amounts-of-snowfall-expected-next-retrogression-of-the-eastern-pacific-ridge-not-e/) - 2/15/2023 Expect clearing sky's by this afternoon.... Brief update to indicate the current cold weather will be giving way to a milder weekend in the high country. Temps at 8000 feet will rise into the mid 40s Saturday and Sunday. Monday, Presidents Holiday, may possibly get into the upper 40s. Lows currently in the single
- [Next Storm System to bring Moderate Snowfall Sunday with gusty winds and cooler temps....Remainder of the week looks dry until next Sunday......](https://mammothweather.com/2023/02/03/next-storm-system-to-bring-moderate-snowfall-sunday-with-gusty-winds-and-cooler-temps-remainder-of-the-week-looks-dry-until-next-sunday/) - 2/4/2023 Saturday AM Update For our weekend storm, it appears that most recent model runs have continued the trend of Beefing Up the snowfall predictions. Here in Mammoth, a good two feet is now expected above 10,000 feet and over a foot in town by Sunday Evening. The storm is moving in sooner
- [Coldest Weather of the year expected tonight with most areas of Mono County near or Below Zero.....Moderating temperatures expected mid week with seasonal temps by the weekend.....Next Weather System Friday weakens then Snow possible again by Sunday....](https://mammothweather.com/2023/01/30/coldest-weather-of-the-year-expected-tonight-with-most-areas-of-mono-county-near-or-below-zero-moderating-temperatures-expected-mid-week-with-season-temps-by-the-weekend-next-weather-system-fr/) - For Mono County, it will be one cold night tonight. (CPK) Continental Polar that has been modified a bit has moved into Mono County last night. This will result in high temps in the mid teens today and lows near zero tonight. The weather system that brought 4 inches of Platinum Powder yesterday was off
- [An end to Mono Lake Fog late this weekend.....Coldest Air of the Season early next week....La Nina Pattern is Back...Mono Lake Fog to return next week.....](https://mammothweather.com/2023/01/26/an-end-to-mono-lake-fog-this-weekend-coldest-air-of-the-season-early-next-week-la-nina-pattern-is-back-mono-lake-fog-to-return-next-week/) - 1/27/2023 10:00AM This mornings global model runs show some interesting changes for the first half of the month of February. Here is what the Dweebs see. At this time, the Hudson Bay Low (Canadian Polar Vortex) has become very strong and deep. It is tied in with the strong, highly amplified ridge over the Eastern
- [<b>Strong Wind Chills of yesterday have abated while warming today will push highs into the mid 30s!....This weekend will be Breezy or Windy with the chance of Snow.....</b>](https://mammothweather.com/2023/01/24/strong-wind-chills-of-yesterday-have-abated-while-warming-today-will-push-highs-into-the-mid-30s-this-weekend-will-be-breezy-and-a-bit-unsettled-but-no-major-storm/) - 1/25/2023 Wednesday AM update; Model runs still look good but not as wet with the Sunday-Monday system. About .75 of an inch of QPF looks good for the Sierra Crest. This means a good foot of snow at the higher elevations as snow to water ratios by Monday afternoon, 15:1 or better. Modified Arctic Air
- [January to finish on a dry note with little or no precipitation....February to begin the same way with storminess developing during its first week.....](https://mammothweather.com/2023/01/23/january-to-finish-on-a-dry-note-with-little-or-no-precipitation-february-to-begin-the-same-way-with-storminess-developing-during-its-first-week/) - Cold Cold Cold! That's the way today will be. A cold Great Basin slider moved through yesterday and is now located over Southern Arizona. Gusty NE winds will continue today over the upper elevations of Mammoth Mt with somewhat lighter winds over the lower slopes. No matter where you ski or board today in the
- [Cold to continue through mid week next week before some relief comes toward that following weekend...Many below zero temperatures expected during the early morning....Highs mostly in the 20s to low 30s....Next Storm Cycle to begin about months end through first week of February....](https://mammothweather.com/2023/01/20/cold-to-continue-through-mid-week-next-week-before-some-relief-comes-toward-that-following-weekend-many-below-zero-temperatures-expected-during-the-early-morning-highs-mostly-in-the-20s-to-low-30/) - 1-21-2023 Recent posting from Snow Brains..... Its official! Mammoth Mt reported last Tuesday; Mammoth Mt has the deepest snowpack in North America! The upper mountain measured recently, is sitting at 504 inches! (42 feet!) Lower Mt has 378 inches. (31.5 feet) This is the most snow so early in the season. However, has a way
- [Colder Weather with drier than normal conditions will be the rule through the 27th...Retrogression in the long wave pattern still favors more snowfall first week of February....](https://mammothweather.com/2023/01/17/colder-weather-with-dryer-than-normal-conditions-will-be-the-rule-through-the-27th-retrogression-in-the-long-wave-pattern-still-favors-more-snowfall-first-week-of-february/) - North West Slider to drop another 3 to 5 inches Wednesday night and another 2 inches Thursday Snow to water ratios will be 15:1 or greater so "Platinum Powder" snow>>>>Then fair dry weekend into next week... With the exit of the Trof that brought wind, moderate snowfall Sunday night into Monday AM, much improved weather
- [Winter Storm Warning in Effect....Expiring at 10:00PM Tonight......White Out Conditions now in town with Gusts to 30MPH.....Snowfall will taper off later today......Tuesday will be dry......Light Snowfall expected Wednesday night and Thursday AM then dry Friday Saturday Sunday...](https://mammothweather.com/2023/01/16/winter-storm-warning-in-effect-expiring-at-1000pm-tonight-white-out-conditions-now-in-town-with-gusts-to-30mph-snowfall-will-taper-off-later-today-tuesday-will-be-dry-light-snow/) - Surface Low crossed the Sierra this morning and is located about Hawthorne, Nevada. Nice deformation zone set up between Hawthorne, NV and up into Reno providing snowfall over Western NV and the Eastern Slopes of the Sierra. SW flow has increased in Mammoth with whiteout conditions at this time. Please do not drive under these
- [Winter storm warning is still Hoisted for Mono County through Tuesday AM….Another smaller storm hits Wednesday night….Then a break Friday and Saturday……](https://mammothweather.com/2023/01/15/winter-storm-warning-is-still-hoisted-for-mono-county-through-tuesday-am-another-smaller-storm-hits-wednesday-night-then-a-break-friday-and-saturday/) - Platinum Powder Alert Tuesday!… Latest model simulations begin the snowfall in Mammoth toward Midnight tonight. Still Expecting up to 3 feet on Mammoth Mountain by Tuesday. Between 18 to 24 inches in town. The snow to water ratios will be much higher with this storm between 12 and 15:1. A Platinum Powder alert
- [Winter Storm underway with heavy snowfall this afternoon into the Night....Snow Showers Sunday then Heavy Snow returning late Sunday night into Monday......A Longer Break Developing Wednesday into the Weekend....](https://mammothweather.com/2023/01/14/winter-storm-underway-with-heavy-snowfall-this-afternoon-into-the-night-snow-showers-sunday-then-heavy-snow-returning-late-sunday-night-into-monday-a-longer-break-developing-wednesday-into-the/) - 1-15-2023 830am Exciting meteorological development with this last significant storm. The new ICON model 12z run shows the upper level wave with this last system, coming through Sacramento late morning while a surface low is over Monterey Bay at 400am and crosses the Sierra near Mammoth late AM. This will bring a bonus of snowfall
- [One more Major Snow Storm is expected Saturday through Tuesday AM....Then pattern trends dryer colder through that following weekend](https://mammothweather.com/2023/01/11/one-more-major-snow-storm-is-expected-saturday-through-tuesday-am-then-drying-trend-mid-week-leading-to-much-colder-weather-dry-weather-trend-should-wrap-up-the-month-of-january/) - 1-13-2023 1:15pm Interesting look at the longer range According to the RIMM Phase space, The MJO will be moving into Phase III which is wetter for CA than phase II See the composites for the MJO phase space for January. The week two GFS and ECMWF has retrogression around that time and storms over the
- [Heavy Snow Today and Tonight...Periods of Heavy Snow Tuesday with Snow tapering off Tuesday night...More smaller systems This weekend into early next week with pattern changing by end of 3rd week of January...](https://mammothweather.com/2023/01/09/heavy-snow-today-and-tonight-periods-of-heavy-snow-tuesday-with-snow-tapering-off-tuesday-night-more-smaller-systems-this-weekend-into-early-next-week-with-pattern-changing-by-end-of-3rd-week-of-j/) - Wow! snowfall rates are 3 inches an hour now on Mammoth Mountain! Between 5:00AM this morning and 9:30AM; 12.5 inches fell at the Main Lodge in 4.5 Hours. That's 3 inch's an hour! Total since Saturday evening is 27 inches. This is truly a dump, thanks to the Atmospheric River! Snowfall totals are on track
- [Storm winds down today…Moderate AR still on tap for Monday….Pattern beginning to show signs of Fatigue…](https://mammothweather.com/2023/01/08/storm-winds-down-todaymoderate-ar-still-on-tap-for-monday-pattern-beginning-to-show-signs-of-fatigue/) - 1/8/23 Storm system over night has brought about 4 to 7 inches in town with 6 to 14 inches on the mountain. Snowfall rates will taper off this afternoon with mainly light amounts. Next storm is the biggie with some 5 to 6 feet possible over the crest by Wednesday AM. Up to 2.5 to
- [Beautiful Day Friday with very light snow Saturday....Massive Storm with 1-2 punch beginning Sunday with strong AR Monday.....Snow Levels tricky!!](https://mammothweather.com/2023/01/06/beautiful-day-friday-with-light-snow-saturday-massive-storm-with-1-2-punch-beginning-sunday-with-strong-ar-monday-snow-levels-tricky/) - 1/7/2023 10:40AM Quick update: No change in the forecast for today. Flat light conditions, no significant snow today. Winds picking up over the upper elevations. Next wave comes in tonight with light to moderate snowfall. Expect about 6 to 12 inches over the upper elevations by mid day Sunday. About 3 to 6 inches in
- [Next AR moving in tonight with Heavy Snowfall expected toward midnight into Thursday AM....There will be a break Friday/Ngt with light snow first half of the day Saturday.....](https://mammothweather.com/2023/01/04/next-ar-moving-in-tonight-with-heavy-snowfall-expected-toward-midnight-into-thursday-am-there-will-be-a-break-friday-ngt-with-light-snow-first-half-of-the-day-saturday/) - This appears to be the year of the AR as the Scripps graphics shows 5 ARs between today and mid month. (See graphics below) of course the data can change but this is today's snap shot. The screaming message this mornings says that there are still a series of storms out there that have the
- [Happy New Year!   Mammoth Mt Reports 32 to 48 inches of new snow!.....More snowfall on the way for the first new week of 2023.....Strato Warming event on the way....](https://mammothweather.com/2023/01/01/happy-new-year-mammoth-mt-reports-32-to-40-inches-of-new-snow-more-snowfall-on-the-way-for-the-first-new-week-of-2023-strato-warming-event-beginning/) - 2:20 PM 1-2-23 Here are some estimates of timing, based upon the latest Europeans Model Ensemble from this morning; Minor fast moving system now on the coast will bring mainly light amounts of snowfall mainly late this afternoon up until midnight tonight. 5 to 7 inches is possible on the Mountain and 3 to 4
- [Nearly Zonal Flow pattern from Japan to the west coast with series of Wet Storms impacting the Sierra the next two weeks....QPF 7 to 8 inches by this weekend west of our Sierra Crest.....](https://mammothweather.com/2022/12/26/nearly-zonal-flow-from-japan-to-the-west-coast-with-series-of-wet-storms-impacting-the-sierra-the-next-two-weeks-qpf-up-to-10-inches-by-this-weekend-over-and-west-of-our-sierra-crest/) - 12-28-2022 Heavy Drought Busting Precipitation is forecasted the next two weeks as a series of Atmospheric River's are associated with and proceed most weather systems. This pattern will keep folks that are dealing with avalanche dangers on there toes as each wet storm contains a period of colder temperatures both before and after for lower
- [Dirty Ridge Continues to allow weak systems to bring considerable high clouds, breezes and mild temps to resort levels.....Longer Range Model trends keep the AR possibilities for next week.....Latest modeling suggest trend to wet January](https://mammothweather.com/2022/12/21/dirty-ridge-continues-to-allow-weak-systems-to-bring-considerable-high-clouds-breezes-and-mild-temps-to-resort-levels-longer-range-model-trends-keep-the-ar-possibilities-for-next-week-latest/) - It will be a fine morning for the last few hours of Fall. Winter Solstice occurs at 1:48pm. Expect Sunny Sky's today Wednesday with highs in the 40s with gusty winds this AM over the crest and some early day breezes in town as well. Tomorrow Thursday shows increasing high clouds. Breezy again with highs
- [Beautiful Weekend on Tap with Strong Inversions and Mono Lake Fog to continue in the Lee Vining Area until winds pick up Tuesday or Wednesday.....It will be milder over the Christmas Holiday then something to watch out for toward New Years....](https://mammothweather.com/2022/12/17/beautiful-weekend-on-tap-with-strong-inversions-and-mono-lake-fog-to-continue-in-the-lee-vining-area-it-will-be-milder-over-the-christmas-holiday-then-something-to-watch-out-for-toward-new-years/) - 12-19-22 No significant changes this morning to yesterday’s thinking. It’s a wait and see this week for next weeks mid week storm. On another note, it’s been touted that we will have a dry January. The Dweebs are not so bullish about that this morning. The NCEP Global Ensemble System extended forecast shows a significant
- [An extended period of dryness will take over the Central Sierra with little or no precipitation for several weeks.....Mammoth Mt has been gifted with a Generious Snowpack so early....Time to Enjoy!](https://mammothweather.com/2022/12/14/an-extended-period-of-dryness-will-take-over-the-central-sierra-with-little-or-no-precipitation-for-several-weeks-mammoth-mt-has-been-gifted-with-a-generious-snowpack-so-early-time-to-enjoy/) - The Weather has work out perfectly with a generious snowpack for the Holiday Season along with excellent weather to enjoy it with. The Hemespheric Pattern shift is under way as the strong blocking high that was over Alaska, retrogrades NW over or near Siberia replacing the large scale upper Vortex near that same area the
- [Very Wet Warm Sector, strong winds and high Dew Points gave "over-all" less snowfall amounts that expected...Models now headed toward cold, then Mild Pattern with possible snowfall expected the end of this week.....](https://mammothweather.com/2022/12/12/this-storm-was-biggest-bust-in-memory-sure-we-got-snow-but-some-of-it-did-not-make-sence/) - 12/13/22 So its cold outside...20s today... Some moderation in temps can be expected tomorrow Wednesday.....At least 10 degrees of warming. Were in a dry pattern now, as the main teleconnecting feature, the upper blocking high is headed for north of Sibera by early mid week next week. A cold upper low is moving into the
- [Crazy strong high latitude blocking pattern and strong negative AO to favor California all December with badly needed rain and mountain snow…..storm systems developing out over pacific will favor the state as long as block remains intact](https://mammothweather.com/2022/12/08/crazy-strong-high-latitude-blocking-pattern-and-strong-negative-ao-to-favor-california-all-december-with-badly-needed-rain-and-mountain-snow-storm-systems-developing-out-over-pacific-will-fa/) - 12-10-2022 QPF was increased yesterday AM and projected amounts are in the 4 to 6 foot range for Mammoth Mt by Monday. Winter storm conditions are developing now with most intense period tonight with AR. longer range forecasting is having major difficulty as high latitude blocking is so differently configured in the global models. They
- [Upper Low along the coast of Northern CA making its move slowly south today and Tuesday with a few more bands of snowfall.....A break is expected Wednesday into Thursday with more snow expected Friday through the weekend.....](https://mammothweather.com/2022/12/05/upper-low-along-the-coast-of-northern-ca-making-its-move-slowly-south-today-and-tuesday-with-a-few-more-bands-of-snowfall-a-break-is-expected-wednesday-into-thursday-with-more-snow-expected-friday/) - 12-8-22 2:15pm Platinum Powder Watch for Sunday WINTER STORM WARNING EARLY SATURDAY AM THROUGH 400AM MONDAY. Cold Pacific storm to bring 3.5 to potentially 5 feet over upper elevations Saturday and Sunday, lingering through Monday..Travel through the Sierra Saturday afternoon to become treacherous through Sunday night. This storm will be the largest so far this
- [Weak AR returns to Southern Mono County today and continues though Mid Day Sunday.....Heavy snowfall likley tonight above 8000 feet.....Snowfall Accumulations of 3 to 4 feet possible between 9000 and 11000 feet by Monday AM....](https://mammothweather.com/2022/12/03/weak-ar-returns-to-southern-mono-county-today-and-continues-though-mid-day-sunday-heavy-snowfall-likley-tonight-above-8000-feet-snowfall-accumulations-of-3-to-4-feet-possible-between-9000-and/) - A weak AR has returned from the south this morning and is bringing Mammoth light snowfall. lower elevations have yet to mix out and so it is snowing at Mammoth AP at the moment. Once the winds kick in over the lower elevations of the county, snow should turn to rain later this AM along
- [Series of storms headed into California over the next two weeks.....Squirrely Models doing their best to drive forecasters Nutty!](https://mammothweather.com/2022/11/30/series-of-storms-headed-into-california-over-the-next-two-weeks-squirrely-models-doing-their-best-to-drive-forecasters-nutty/) - 12-2-22 storm total at the main lodge was 23 inches. more over the top…. It will be a great day today before the next storm rolls in early Saturday! ___________________________________________________________________________ 12/1/2022 As of 4:30PM Mammoth Mt at the Main Lodge has picked up 12 inches of new snow since 6:00AM ____________________________________________________________________________________________________________________________________________________________________________________________________________ Normally, when you get
- [Chilly Upper Low is now dropping south into the Great Basin with high cloudiness....Increasing wind and falling temperatures....Model Solutions are becoming more inline as two cold short waves out of the Eastern Gulf of Alaska, Dive south into the far Eastern Pacific.....AR's still lurking for Southern and Central CA.](https://mammothweather.com/2022/11/28/chilly-upper-low-is-now-dropping-south-into-the-great-basin-with-high-cloudiness-increasing-wind-and-falling-temperatures-model-solutions-are-becoming-more-inline-as-two-cold-short-waves-out-of/) - Quick 11/29/2022 900pm update Shows 00Z Wednesday GFS run wetter scenario again like earlier this morning, for the 2nd storm. So 4 to 5 feet over the crest again possible by Monday. 700MB winds are Orthrogonal to the sierra both Thursday afternoon and Saturday afternoon. GFS = Global Forecast System (American Global Model) Z Times
- [Typical La Nina Pattern in Play with dumps of cold air into the Great Basin and Northern and Central Rockies....Too much over land trajectory for meaningful snowfall until later next week...Then Weak AR to visit Thursday/Ngt and Saturday/Ngt](https://mammothweather.com/2022/11/26/typical-la-nina-pattern-in-play-with-dumps-of-cold-air-into-the-great-basin-and-northern-and-central-rockies-too-much-over-land-trajectory-for-meaning-full-snowfall-until-later-next-week/) - 11/27/2020 Monday AM update It was interesting to watch a fairly significant MJO build into Phase 7 with projections into Phase 8. This is an area in the winter noted for Atmospheric Rivers. Up until just a few days ago, non were being forecasted by the global models. Yesterday and the day before, a moderate
- [Beautiful Thanksgiving Holiday in the making with upper ridge over the state for seasonal to above seasonal temps....Colder pattern taking shape early next week with first system NW Slider bringing light amounts of snowfall Monday.....Additional systems expected later in the week....](https://mammothweather.com/2022/11/23/beautiful-thanksgiving-holiday-in-the-making-with-upper-ridge-over-the-state-for-season-to-above-season-temps-colder-pattern-taking-shape-early-next-week-with-first-system-nw-slider-bringing-light/) - Outside of the areas of freezing fog like Lee Vining and Crowley Lake, our weather throughout Mono County has been Steller with highs well into the 40s at resort levels and low 20s at night. A stronger upper ridge will build into the region tonight into Friday. Valley inversions are likely to continue the next
- [The cold in the west will give way to milder pacific air next week...It continues to be unlikely that any meaningful precipitation will fall until months end....](https://mammothweather.com/2022/11/16/the-cold-in-the-west-will-give-way-to-milder-pacific-air-next-week-it-continues-to-be-unlikely-that-any-meaningful-precipitation-will-fall-until-months-end/) - 9:50AM 11-18-2022 The New IRI graph is out and is indicated below. It continues the trend of ENSO going neutral during the Boreal Spring 2023. What's encouraging is that the average in the graph shows -.5C by about March 2023. That is the threshold of La Nina. More importantly, AR's in CA, AKA Atmospheric Rivers,
- [After nearly 6 foot dump on upper mountain, snow pack on Mammoth Mountain one of best in years for the upcoming Thanksgiving holiday…. More coming!?](https://mammothweather.com/2022/11/11/after-nearly-6-foot-dump-on-upper-mountain-snow-pack-on-mammoth-mountain-one-of-best-in-years-for-the-holiday-more-coming/) - 11/15/2022 This is another quick update: This mornings coastal slider brought clouds and another shot of cold air to the Eastern Sierra. Pacific air will begin to modify our unseasonably cold airmass tomorrow Wednesday with highs backup into the low 40s by Thursday. Winds will be light by then. Our airmass is likely to modify
- [Warm Wet Portion of Storm brings snowfall above 10000 feet today....With Weak AR pushing south overnight.....Next portion of storm, very dynamic, will bring heavy snowfall and potential Blizzard conditions Tuesday.....Another storm lurking the end of next week?](https://mammothweather.com/2022/11/06/warm-wet-portion-of-storm-brings-snowfall-above-10000-feet-today-with-weak-ar-pushing-south-overnight-next-portion-of-storm-very-dynamic-will-bring-heavy-snow-fall-and-potential-blizzard-cond/) - 10:00AM 11/7/2022 Update Although Mammoth Mt reports 4 inches at the main lodge this AM, temperatures have been well below freezing on the top of Mammoth Mt, during the weak AR, Sunday. The weather plot at Sesame tallied over an inch of water in the data. Thus it is likely that the upper mountain above
- [Mammoth Mt picked up 11 to 16 inches storm total.....Cold Showery Wednesday AM to give way to more Sunshine this afternoon.....Good Base building system still headed our way for Late Weekend into Tuesday night....](https://mammothweather.com/2022/11/03/mammoth-mt-picked-up-11-to-16-storm-total-cold-showery-wednesday-am-to-give-way-to-more-sunshine-this-afternoon-good-base-building-system-still-headed-our-way-for-late-weekend-into-tuesday-nig/) - 11-5-2022 3:40pm Quick Update; GFS came over to EC solution late Saturday AM. That is digging a bit further west and about 12 hours slower solution with Trof Axis coming in Wednesday AM vs Tuesday night. So QPF was bumped up about .75 inches for Yosemite and Huntington Lake area by RFC.
- [First Storm of the Season is expected to move in on Tuesday with FROPA expected late afternoon into Tuesday Evening.....Generally Light amounts in town with a bit more over the Upper Elevations....Next Week will be very interesting!](https://mammothweather.com/2022/10/31/first-storm-of-the-season-is-expected-to-move-in-on-tuesday-with-fropa-expected-late-afternoon-into-tuesday-evening-generally-light-amounts-in-town-with-a-bit-more-over-the-upper-elevations-nex/) - 2:20PM 11-1-22 Bullet Points.. Models have come in slightly wetter this afternoon. Not that it will make a big difference. Snowfall should start around 5:00PM in Mammoth Longer range has the Euro with an IVT plume into our area, IVT 300kg ((ms)) (small) but respectable AR Sunday, while the GFS it Monday AM. Still
- [Fair Weather Trend Through Weekend Looks Good...Pattern Change next week looks very real now without any influence of Tropical Systems.... Its all about mid latitude forcing now as active pattern develops next week and beyond....](https://mammothweather.com/2022/10/28/fair-weather-trend-through-weekend-looks-good-pattern-change-next-week-looks-very-real-now-without-any-influence-of-tropical-systems-its-all-about-mid-latitude-forcing-now-as-active-pattern-deve/) - 10-29-22 Well....My concerns of the past week are beginning to occur. That is, a storm that has plenty of cold air, is trending inland sooner, then shearing N/S over California, before closing off into a closed low over AZ Late Thursday/Friday. This Saturday's 12z GFS slides inland the system too soon to bring lots of
- [Fairly Seasonal Temps...Some clouds and maybe a few showers by Sunday.....Next Focus is invest 93W for next week.....](https://mammothweather.com/2022/10/25/fairly-seasonal-temps-some-clouds-and-maybe-a-few-showers-by-sunday-next-focus-is-tnvest-93w-for-next-week/) - 10/27/2022: This mornings update shows both ECMWF and the GFS giving us a storm between the Tuesday and Thursday period. The Key is how the phasing is going to take place over the western pacific with tropical storm energy. In Constructive Phasing; the Energy comes into the westerlies and greatly amplifies the down stream pattern
- [Chilly Weather has returned to the high country....Breezy North West Winds....Cold overnight lows....Great snow making weather!](https://mammothweather.com/2022/10/23/chilly-weather-has-returned-to-the-high-country-breezy-north-winds-cold-overnight-lows-great-snow-making-weather/) - Mammoth is in its colder season now with below normal temps as periodic weather system's reinforce the Inter Mountain Long Wave Trof through months end. Expect highs for the upcoming week to be in the 40s and 50s now with lows in the Teens and 20s.... Accompanied with NW breezes in the 15 to 30
- [The Last of the Warm days are at hand as an active pattern develops this weekend into Next Week.....Strong Winds develop Saturday AM....](https://mammothweather.com/2022/10/18/the-last-of-the-warm-days-are-at-hand-as-an-active-pattern-develops-this-weekend-into-next-week-strong-winds-develop-saturday-am/) - 3:05 PM Well....The NWS in Reno blew it on the winds down here in Mono County As this is Wind Advisory criteria. Winds have been gusting 50MPH to 60MPH at the Mammoth AP since 9:30 this morning. Gusts in Mammoth have been 30 to 60 all day today in the Mammoth Meadow. Come on Guys
- [Mid Latitude Blocking pattern to continue through the weekend with no sensible change to the weather....Changes are in store next week.....](https://mammothweather.com/2022/10/14/mid-latitude-blocking-pattern-to-continue-through-the-weekend-with-no-sensible-change-to-the-weather-changes-are-in-store-next-week/) - 10-16-2022 10:40AM Another brief update; The idea yesterday that the MJO being in phase 6 with the Lagged composites' showing a Cold Pacific NW to Great Basin LW Trough in Laggs 3, 4 and 5 seems to be favored again today. The latest ensemble runs from both GFS and ECMWF continue to be in agreement
- [Weather to Remain Fair and Mild with above normal temperatures through the weekend.....Some cooling expected early next week.....Then First Winter Storm for the following Weekend?](https://mammothweather.com/2022/10/12/weather-to-remain-fair-and-mild-with-above-normal-temperatures-through-the-weekend-some-cooling-expected-early-next-week-then-first-winter-storm-for-the-following-weekend/) - 10-13-2022 Update No change in the short term with above normal temps in Mammoth to the tune of mid to upper 60s. The NE flow will keep our weather dry with chilly nights down into the Upper 30 and low 40s through the weekend. Longer Range: Last nights ensemble runs for week 2 show the
- [Beautiful Fall weather to continue the next 6 to 10 days with above normal temperature’s……](https://mammothweather.com/2022/10/01/beautiful-fall-weather-to-continue-the-next-6-to-10-days-with-above-normal-temperatures/) - October 5, 2022 The new European model seasonal forecast is now out. It is calling for a wetter than normal winter for the northern and central sierra. Remember, not all La Niña winters are dry for the central sierra. The ECMWF showed wet for the upcoming winter in their August update, then backed off on
- [Record Extra Tropical Cyclone near the Aleutians to Pump up large ridge into the GOA and in turn...Sets up major Storm for CA... Weeks end into the next week.](https://mammothweather.com/2022/09/15/record-extra-tropical-cyclone-near-the-aleutians-to-pump-up-large-ridge-into-the-goa-and-in-turn-sets-up-major-storm-for-ca-weeks-end-into-the-next-week/) - 9-18-2022 Update This mornings model runs are continuing the recent trends of strengthening the blocking high over Texas. Thus it is less likely now that this weather system will do much in the form of precipitation for the Eastern Sierra of Mono County. RFC this morning definitely shows most significant accumulations over the coastal plane
- [Weak upper jet continues the trend of drying here in Mono County today with a stronger trof moving in later this weekend...... a little Light snowfall is possible Monday night into Wednesday.....Fair warm dry weekend to follow](https://mammothweather.com/2022/09/14/weak-upper-jet-continues-the-trend-of-drying-here-in-mono-county-today-with-a-stronger-trof-moving-in-later-this-weekend-a-little-light-snowfall-is-possible-monday-night-into-wednesday-fair/) - Most of the moisture is gone now from the tropical influx of last week. Outside of a few remaining isolated showers today and tomorrow, temperatures will now be seasonal to a bit cooler than normal. Breezy weather to develop Saturday into Sunday as the Equinox Trof arrives Sunday into Wednesday next week. Some light snowfall
- [Heat Wave Breaks as Tropical Rains this Weekend followed by Fall Weather later Next Week...](https://mammothweather.com/2022/09/09/heat-wave-breaks-as-tropical-rains-this-weekend-followed-by-fall-weather-next-week-and-beyond/) - 9-11-2022 Update Yesterdays rainfall in the Mono County that began mid afternoon into the evening averaged between .25 and .50 with some amounts in isolated areas of over an inch. There were two areas noted for stronger storms. For Mono County was the area around Mono Lake. For the Inyo country area, Between Big Pine
- [Hot Hot California in process with Tropical Storm lurking for next weekend for some rain and relief!](https://mammothweather.com/2022/09/03/hot-hot-california-in-process-with-tropical-storm-lurking-for-next-weekend-for-some-rain-and-relief/) - The on again off again and now on again threat for areas of significant rain in CA next weekend is in play. An accumulation of ensemble members are becoming for numerous for for just that option. In the meantime, hope must folks can get relief for the heat. Best places are at the immediate coast
- [The Late Summer Heatwave of 2022 is in process over the state with hundreds of records expected to be broken....Models have backed off on on any significant rain chances for next week....](https://mammothweather.com/2022/09/01/the-late-summer-heatwave-of-2022-is-in-process-over-the-state-with-hundreds-of-records-expected-to-be-broken-models-have-backed-off-on-on-any-significant-rain-chances-for-next-week/) - 12z NAM 500MB Heights early this morning had the center of a developing continental high between Mammoth and Stockton with the Progg shifting the upper center over Eastern NV later today. Heights continue to rise as do surface temps. By around noon Friday, the center is near the NV/Utah border with 500mb heights well in
- [After a short break in the heat.....Heat comes back with Vengeance over protracted period through Labor Day Holiday followed by possible thunderstorm outbreak....!](https://mammothweather.com/2022/08/29/after-a-short-break-in-the-heat-heat-comes-back-with-vengeance-over-protracted-period-through-labor-day-holiday/) - 8/29/2022 After a slightly cooler weekend, a major heat spell will engulf California as the subtropical high rebuilds once again and a heat wave takes over the southern half of the state. High temps will be near record levels by mid week this week in Mammoth and hold through the holiday weekend (Low to mid
- [A very warm week ahead is expected with record or near record high temperatures....High Temps cooling to the Mid 70s over the weekend along with gusty winds...](https://mammothweather.com/2022/08/22/a-very-warm-week-ahead-is-expected-with-record-or-near-record-high-temperatures-isolated-thunderstorms-are-in-the-forecast-through-thursday-anomalous-500mb-heights-will-increase-further-by-labo/) - 8/29/2022 After a slightly cooler weekend, a major heat spell will engulf California as the subtropical high rebuilds once again and a heat wave takes over the southern half of the state. High temps will be near record levels by mid week next week in Mammoth and hold through the holiday weekend. For Southern CA,
- [Dry conditions with a stable airmass will continue for the Sierra through Sunday.....Thereafter a southerly jet brings another opportunity for Showers and Thunderstorms as Early as Monday with increasing chances Tuesday and Wednesday for Additional Rain....](https://mammothweather.com/2022/08/11/dry-conditions-with-a-stable-airmass-will-continue-for-the-sierra-through-sunday-thereafter-a-southerly-jet-poses-another-oppertunity-for-showers-and-thunderstorms-as-early-as-monday-with-increasi/) - A dry SW flow continues to keep the Owens Valley and the Sierra, storm free through Sunday. This is due to a closed low off the coast, that opened into a Trof and was responsible for ushering in of dryer air last Saturday. The behavior of the Trof will change early next week, as it
- [Monsoon Pattern will likely culminate today and Friday as both drier air moves in and a more stable air mass arrives Saturday and Sunday.....However, another surge arrives Monday....](https://mammothweather.com/2022/08/04/monsoon-pattern-will-likely-culminate-today-and-friday-as-both-drier-air-moves-in-and-a-more-stable-air-mass-arrives-saturday-and-sunday-however-another-surge-arrives-monday/) - It looks like a couple of very active days and nights for both Inyo and Mono County as Deep Monsoon Moisture remains in place and at the same time, and even more importantly, the aid of the jet stream comes to play. Today Thursday, The RT rear entry of a rather weak upper jet will
- [Fair and Dry through Weeks End with slightly above normal temperature's. A Monsoon Surge is expected early to middle of next week....](https://mammothweather.com/2022/07/21/fair-and-dry-through-weeks-end-with-slightly-above-normal-temperatures-a-monsoon-surge-is-expected-middle-of-next-week/) - 08/01/2022 At the moment, on the 850MB/ 250MB Lower Convergence/Upper Divergence couplet is developing West of Bishop over the Sierra then NE into Southern Mono County. Should be a very active day especially NE of that area. Flash flood watch for Owens Valley Through 10:00pm TONIGHT. Thunderstorms bringing Heavy rain are possible for
- [Monsoon Time....Where's the Rain?......Drier later next week.....Warm weather to continue...](https://mammothweather.com/2022/07/16/monsoon-time-wheres-the-rain-drier-later-next-week-warm-weather-to-continue/) - 7/18/2022 Monday AM update: Of note, dew points are on the increase from south to north over Inyo County this morning, as at the same time, temps are rising. PWAT's ranges from, .75 to 1,00 over the Owens Valley. Additionally, mid level moisture is increasing and being fed by two areas, one over
- [Expect a Gradual Cooling Trend this week through July 4th.....The holiday will be quite breezy especially Sunday and July 4th.....Then get ready for a major heatwave the following weekend as WX Maps have the dreaded 600 DM Upper High over the west!](https://mammothweather.com/2022/06/28/expect-a-gradual-cooling-trend-this-week-through-july-4th-the-holiday-will-be-quite-breezy-especially-sunday-and-july-4th-then-get-ready-for-a-major-heatwave-as-the-following-weekend-maps-has/) - 6/30/2022 After a rather cool breezy Fourth of July Holiday and weekend, a warming trend will begin by the middle of next week and by the following weekend, warmer than normal temps and much less wind is expected. The forecast model that is most consistent is the GFS Extended with the main height anomaly
- [Cold Breezy weekend....But the last!  Summer arrives this Tuesday and the Summertime Thunder starts the day after!](https://mammothweather.com/2022/06/19/cold-breezy-weekend-but-the-last-summer-arrives-this-tuesday-and-the-summertime-thunder-starts-the-day-after/) - Latest ECMWF 12z run today Fathers Day has the cold upper trof that has been bringing below normal temps to Mono County and freeze conditions at night, moving out today. Another chilly day today is in process and another freeze tonight likely, at least for a few areas. Rapid warming is expected to begin Monday
- [Winters Last Gasps are on their way.....One this weekend and the very last Fathers Day......Thereafter....Continental high sets up for the Summer.....](https://mammothweather.com/2022/06/10/winters-last-gasps-are-on-their-way-one-this-weekend-and-the-vary-last-fathers-day-there-after-continental-high-sets-up-fpr-the-summer/) - 9:15 AM 6/16/2022 High temperatures reached the mid 70s in Mammoth Wednesday with similar highs expected today Thursday. A trough of low pressure was centered off the Oregon Coast this morning destined to dig through California over the weekend. Expect strong gusty winds developing later today and stronger winds in the 50 to 60MPH
- [Current Pattern of Warming and Cooling with wind to continue a few more weeks before Spring's slide into Summer is Permanent](https://mammothweather.com/2022/05/31/current-pattern-of-warming-and-cooling-with-wind-to-continue-a-few-more-weeks-before-springs-slide-into-summer-is-permanent/) - Its interesting to note that the average high temperature for Mammoth now is 65 degrees and will move climatically up into the low 70s by Father's Day. Our Last freeze is usually Fathers Day. Over the next 5 days the MJO will be sailing through Phases 7/8 or out over the Western Pacific with
- [The current warming trend continues in the High Country through Mid Week...Then cooler, windy,  unsettled weather expected over the Holiday weekend](https://mammothweather.com/2022/05/24/the-current-warming-trend-continues-in-the-high-country-through-mid-week-then-cooler-windy-unsettled-weather-expected-over-the-holiday-weekend/) - The next couple of days will be Summer like with highs in the mid to upper 70s today and Wednesday... The Progs continue to show a progressive pattern with the next upper height anomaly progressing toward the coast today anti-cyclonically. As a result, expect today Tuesday to be the day with the least amount of
- [A beautiful weekend for the high country with low 70s at resort levels expected.....](https://mammothweather.com/2022/05/13/a-beautiful-weekend-for-the-high-country-with-low-70s-at-resort-levels-expected/) - With the upper jet pushing back up in the the pacific NW and moderate 500mb height rises currently occurring over CA , Mammoth Lakes high temps will climb into the low 70s this weekend with overnight lows in the upper 30 and low 40s. It will be a great weekend for all outdoor activities, especially
- [It’s the year of the NW Jet…..Another strong NW jet will buffet the Sierra this weekend…..](https://mammothweather.com/2022/05/05/its-the-year-of-the-nw-jet-another-strong-nw-jet-will-buffet-the-sierra-this-weekend/) - Not much to say about this next ugly NW Jet but nasty. The Dweebs cannot wait for the ENSO region to warm up! This weekend will be increasing windy with strongest winds developing Saturday afternoon through Sunday. 40 to 50mph plus is expected in town. Temps will cool to the low 40s for highs
- [Gusty Winds Thursday will give way to a great Fishing Opener Saturday and Sunday....Breezy weather to return Monday and Tuesday before a nice warm Cinco De Mayo...Cooler Breezy WX  follows Thursday and Friday.....](https://mammothweather.com/2022/04/28/gusty-winds-thursday-will-give-way-to-a-great-fishing-opener-saturday-and-sunday-breezy-weaather-to-return-monday-and-tuesday-before-a-nice-warm-cinco-do-mayo-cooler-breezy-wx-follows-thursday-a/) - Its a cooler day today as a rather large but benign upper trof pushes through the region. High temps are running some 5 to 7 degrees cooler today than Wednesday with highs in the upper 40s. A few gusts to 55mph around noon today were noteworthy. This fast moving trof will pass off into the
- [Windy Weather returns as another in a series of April Storms Greet the Sierra.....Snow Fall to be more plentiful with another system Thursday into Friday....](https://mammothweather.com/2022/04/18/windy-weather-returns-as-another-in-a-series-of-april-storms-greet-the-sierra-snow-fall-to-be-more-plentiful-with-another-system-thursday-into-friday/) - 8:30AM 4/20/22 A Wind Advisotry has been Hoisted by the NWS beginning at 8:00PM Tonight through 5:00AM Thursday AM. A Winter Storm Warning has been Hoisted; Beginning 5:00AM Thursday through 11:00AM Friday for strong winds....Blizzard conditions and heavy snowfall. NWS Comments; "Heavy snow expected. Total snow accumulations of 6 to 12 inches near
- [Clear Cold Morning in Mammoth with Single Digit Lows.....Milder Weather on the way this week with more snowfall.....](https://mammothweather.com/2022/04/12/clear-cold-morning-in-mammoth-with-single-digit-lows-milder-weather-on-the-way-this-week-with-more-snowfall/) - Yesterday's wind storm brought gusts over 60 MPH in town. Mammoth Mt reported 5 to 6 inches at the Main Lodge. The Dweebs figured some 8 to 9 inches fell on the upper mountain. Today...winter type skiing and boarding returns. Highs today will be in the 20s on Mammoth Mtn. The cold upper trough over
- [Current Near Record Warmth to be followed by Dreaded NW Jet Monday PM.....Batten Down the Hatches!](https://mammothweather.com/2022/04/08/current-near-record-warmth-to-be-followed-by-dreaded-nw-jet-monday-pm-batten-down-the-hatches/) - 8:00AM 4-11-22 Quick update for QPF California Rivers Forecast Center bumped up the QPF this AM. 1.06 over Yosemite So up to 10 inches to a foot a possibility now over the upper elevations of Mammoth Mt by Tuesday, The storm is cold and so Kuchera ratio's used. 10 to 15 inches over Upper Elevations
- [Nice Warm Weekend with Breezy Weather late and early next week....Mini Heat Wave Mid Week......](https://mammothweather.com/2022/04/02/nice-warm-weekend-with-breezy-weather-late-and-early-next-week-mini-heat-wave-mid-week/) - April 3rd Just a quick update Longer range outlook looking quite promising for chilly unsettled weather beginning about the 10th and continuing for a week. Questions continue to be where the Trof axis is going to set up. Gfs has it plenty far west for good April type storm, while Euro is a bit too
- [Record Warmth followed by a Moderate Storm in the high country, next 5 days.......A cool down is expected prior to the following weekend...](https://mammothweather.com/2022/03/24/record-warmth-followed-by-a-moderate-storm-in-the-high-country-next-5-days/) - SNOWFALL UPDATE: Mammoth expecting some 3 to 5 inches in town and 7 to 10 inches up on Mammoth Mountain Sunday night through Tuesday Morning. It will be a breezy day today with winds 25 to 30 MPH out of the WSW. Sky conditions parlty then mostly cloudy later today. Highs in the
- [A Series of Fast moving spring storms highlight the pattern this week....Tuesdays system will feature higher snow levels, wind and light snowfall.....A wetter systerm is probable next weekend....](https://mammothweather.com/2022/03/14/a-series-of-fast-moving-spring-storms-highlight-the-pattern-this-week-tuesdays-system-will-feature-higher-snow-levels-wind-and-light-snowfall-a-wetter-systerm-is-probable-next-weekend/) - After a raging wind storm Sunday morning, this morning was quite tranquel with sunny skys and calm winds. It will be a warmer day today Monday with clear skys and light to moderate breezes developing. The high temperature will be 54 in town today with lows tonight near 30 with wind. A fast moving front
- [Cold Upper Great Basin Trof Has pushed through this morning with Very Cold Temps in its wake.....Warming to follow into the weekend....Winter Passes on a dry note with better odds for meaningful snows with Springs Arrival....](https://mammothweather.com/2022/03/10/upper-cold-great-basin-trof-has-pushed-through-this-morning-with-very-cold-temps-in-its-wake-warming-to-follow-into-the-weekend-winter-passes-on-a-dry-note-with-better-odds-for-meaningful-snows/) - 3/11/22 Models beginning to react to the upcoming change of season with the upper flow becoming more progressive across the pacific and the La Nina pattern of predominantly meridional flow becoming less frequent in our future.. Like the Fall, until La Nina sets in, the upper jet sags ever so further south, with early season
- [This week will highlight another Cold Great Basin Trof windy weather in the high country Wednesday and gusty winds for the Owens Valley Thursday..........The weekend looks fair and warmer with highs recovering some 20 degrees from Thursday's temps......Longer range models still bring hope for a wet system about the 15th.....](https://mammothweather.com/2022/03/08/this-week-will-highlight-another-cold-great-basin-trof-windy-weather-in-the-high-country-wednesday-and-gusty-winds-for-the-owens-valley-thursday-the-weekend-looks-fair-and-warmer-with-highs-r/) - For all interested, the Snow Phone is back on line. Thank you for your patience. 9:25AM Wednesday 9th (Beautiful morning in the high country. Winds calm, temperature 42 degrees at 9:30AM) An inside slider type storm will push into Northern CA tonight, beinging an increase of wind beginning this afternoon. Highs today in Mammoth will
- [Pattern Change will bring low end moderate amounts of snow this weekend with a fair early next week...Milder Temps is possible next Thursday into Saturday the following weekend.....](https://mammothweather.com/2022/03/03/pattern-change-will-bring-low-end-moderate-amounts-of-snow-this-weekend-with-a-fair-early-next-week-milder-temps-is-possible-next-thursday-into-saturday-the-following-weekend/) - Mammoth Mt may pick up close to a foot of snow this weekend...Although not what we hoped for, still a decient amount to freshen up the base. There are two systems...One that is taking a track a bit more to our south tonight as compared to what it looked like earlier this week. The track
- [Long Awaited Pattern Change at Hand as Long Wave or Adjustment Wave develops offshore. Snowfall returns to the high country Thursday....Then possibly on and off into following week....](https://mammothweather.com/2022/02/27/long-awaited-pattern-change-at-hand-as-long-wave-or-adjustment-wave-develops-offshore-snowfall-returns-to-the-high-country-thursday-then-possibly-on-and-off-into-following-week/) - 1:25PM Monday. the 28th New ECMWF came in and splits the Trof more than GFS. So amounts at this time look to be more in the 3 to 6 inches range rather than 8 to 10 over the crest. However, there is always the possibility of getting a bit more. Another wave will come in
- [Cold Arctic Born System Moves Out Today with Clearing Skys and Even Colder Temperatures Tonight....A gradual warming trend is expected through early next week........MJO Forcing this Month to Produce Undercutting of the Westerlies Mid Week Next Week....](https://mammothweather.com/2022/02/23/cold-arctic-born-system-moves-out-today-with-clearing-skys-and-even-colder-temperatures-today-a-gradual-warming-trend-is-expected-through-early-next-week-mjo-forcing-this-month-to-produce-un/) - 2-24-2022 Quick update this morning to tout the record cold temperatures in the Owens Valley last night. A new record of 9 degree was set at the Bishop AP eclisping the old record set back in 1991 of 10 degrees for this Morning. A slow warming trend is expected as Cold Arctic Air leaves the
- [Seasonable Temperatures expected this weekend before another very cold Great Basin Low set up over the far west....Early to Mid Week....](https://mammothweather.com/2022/02/18/seasonable-temperatures-expected-this-weekend-before-another-very-cold-great-basin-low-set-up-over-the-far-west-early-to-mid-week/) - Expect light breezes along with seasonal temperatures this weekend before winds increase Sunday afternoon. Winds will guat up into the 30 MPH range with ridge top gusts about 60 MPH on Sunday PM. Mammoth Lakes Highs will be in the low to mid 40s with lows in upper teens. A dry cold front will push
- [Cold California Slider brings Wind Chills....Light amount of snowfall and Heralds a change in the pattern......Warmer Weekend Ahead....](https://mammothweather.com/2022/02/15/cold-california-slider-brings-wind-chills-light-amount-of-snowfall-and-heralds-a-change-in-the-pattern/) - 2-17-2022 Although not conclusive, an increasing number of Ensemble Members of the GFS are trending toward an undercutting scenario in the week 2 period which extends the outlook period through the 2nd day of March at this time. The way the pattern is set up over the EP, there are two ways to get a
- [Warmer Temperatures expected for the upcoming week with the next change a chilly slider through the Far West.....Long Long Range still looks very Encourging for Pattern change to wet during last week of the Month....](https://mammothweather.com/2022/02/06/warmer-temperatures-expected-for-the-upcoming-week-with-the-next-change-a-chilly-slider-through-the-far-west-long-long-range-still-looks-very-encourging-for-pattern-change-to-wet-during-last-week/) - 2-13-2022 The long awaited retrogression has begun in the models…. The upcoming week will be exciting in seeing how the new pattern develops during the outlook period, as pacific storms return to Ca again. Stay tuned! Dr Howard and the Dweebs…………😉 ___________________________________________________________________________________________________ 2/9/2022 The best news coming out of the CPC discussion yesterday
- [Forecast Outlooks remain dry through the next two weeks...Encourging signs from Tropical forcing developing after Mid February......](https://mammothweather.com/2022/01/29/forecast-outlooks-remain-dry-through-the-next-two-weeks-encourging-signs-from-tropical-forcing-developing-after-mid-february/) - Groundhogs Day>>>>= mid point of Winter Here is an excerpt from the CPC on tropical forcing and the emergence of an MJO. I think that this is all positive in the long run for a productive pattern shift. However, It may not happen for 3 to 4 weeks out though. From the climatic prediction
- [Coming into the Home Stretch of January....Crystal Balls anyone?](https://mammothweather.com/2022/01/24/coming-into-the-home-stretch-of-january-crystal-balls-anyone/) - 1/28/2022 Hope on the Horizon..... Here are some thoughts of mine that are encouraging about a pattern change for snowfall potential for the month of February. As mentioned earlier, storms from the pacific are shut out for the foreseeable future. The Eastern Pacific High must love the west coast because it is pretty much snuggled
- [Upper high to strengthen off shore into the weekend while weak great basin sliders kick up some north winds Friday....Longer range still clouded.....](https://mammothweather.com/2022/01/18/upper-high-to-strengthen-off-shore-into-the-weekend-while-weak-great-basin-sliders-kick-up-some-north-winds-friday-longer-range-still-clouded/) - 1 20 22 So far and at this time, I am not excited about the possibility of a significant storm the end of the month or even the first days of February. The maps are not shaping up well and Neither the MJO. What may happen is a slider pattern with light snowfall, periods of
- [Dry January Pattern to continue.....Possibly through months end.....Milder weather expected next weekend...](https://mammothweather.com/2022/01/16/dry-january-pattern-to-continue-possibly-through-months-end-milder-weather-expected-next-weekend/) - January 17th Both GFS and Euro ensembles are showing much more promise this morning of a stronger pacific undercutting pattern developing around the end of the month. A lot needs to be worked out in the meantime. However, AR moisture may come into play, confluent with a decent eastern pacific Trof. The Dweebs just
- [A Flip in the Hemispheric Pattern to +PNA will give us our January Thaw toward Mid-Month....A great time to enjoy all that December snowfall!!!!](https://mammothweather.com/2022/01/03/a-flip-in-the-hemispheric-pattern-to-pna-will-give-us-our-january-thaw-toward-mid-month-a-great-time-to-enjoy-all-that-december-snowfall/) - Jan. 11TH Pursuant to the last post, it is evident that there will be no major off-shore event for SOCAL on Friday. Nevertheless, there is one occurring now with warmer temps expected Wednesday. The upper low SW of Southern CA gets picked up early next week for a few showers in the LA area
- [Cold Western Trof Shifts East This Weekend bringing a beautiful ski weekend......Another potent storm sets up over the eastern pacific next week.....](https://mammothweather.com/2021/12/28/cold-western-trof-shifts-east-this-weekend-bringing-a-beautiful-ski-weekend-another-potent-storm-sets-up-over-the-eastern-pacific-next-week/) - 12/29/2021 The forecast remain the same through the weekend as the current western trough gets ready to exit. One more system today whose short wave is splitting off shore will bring the lions share of precipitation to Southern CA today and tonight. Here in the high country, some 6 to 10 inches is expected on
- [Heavy Snowfall this morning followed by a splitting system Wednesday....A bout of modified arctic air later this week....Chats about blocking pattern....](https://mammothweather.com/2021/12/27/heavy-snowfall-this-morning-followed-by-a-splitting-system-wednesday-a-bout-of-modified-arctic-air-later-this-week-chats-about-blocking-pattern/) - Were off to one of the best starts in a water year since winter 2018/19. The reason? A mid pacific Blocking Pattern that has persisted for several weeks.... It is important to note that blocking patterns are not all alike. A blocking ridge over the far eastern pacific brings cold to the east and dry
- [Platinum Powder Alert for Sunday AM.....with 1 to 2 feet of Platinum Powder possible....Additional Storm totals of 2 to 5  feet by Tuesday AM....Turning Colder....](https://mammothweather.com/2021/12/24/platinum-powder-alert-for-sunday-am-with-1-to-2-feet-of-platinum-powder-possible-additional-storm-totals-of-3-to-6-feet-by-tuesday-am-turning-colder/) - Oops! Not sure what’s happened with the pattern out over the pacific. It looks like the blocking high that would not die…. canceling the big change in the pattern for the time being…..concerned where the pattern is going….., Sunday the 26th, Latest update shows cold Trof to being additional amounts of snowfall through New
- [Major Storm Slows a  bit…..headed our way......Snow to begin Falling Wednesday AM with Heavy Snowfall Thursday and no end in sight!](https://mammothweather.com/2021/12/21/major-storm-slows-a-bit-but-headed-our-way-snow-to-begin-falling-late-tuesday-night-with-heavy-snowfall-thursday-and-no-end-in-sight/) - 4:30pm Wednesday 22; Some changes to atmospheric river now going from weak to moderate. Additionally, trof coming in later Thursday has lower portion splitting off into small closed low. This puts 6 day bulls eye over Sierra, west of Bishop. Where over 9 inches of water is forecasted over Huntington Lake. More importantly….there is the
- [Foggy valleys under weak ridge will give way to clearing skies as winds increase Sunday night into Monday…..](https://mammothweather.com/2021/12/19/foggy-valleys-under-weak-ridge-will-give-way-to-clearing-skies-as-winds-increase-sunday-night-into-monday/) - First of All, on the Mono Lake area, there is strong Pogonip fog in process at 9:30am this morning. If you are traveling into that area by car, turn on your defrosters and heat the windshield, to prevent glass related ice fogging. The fog should burn off later today. As winds increase due to the
- [Fab Weekend in Mammoth....Clear skies calm winds and plenty of snow!   More on the way...Might be excessive...Well see..](https://mammothweather.com/2021/12/18/fab-weekend-in-mammoth-clear-skies-calm-winds-and-plenty-of-snow-more-on-the-way-might-be-excessive-well-see/) - 12-19-2021 sudden stratowarm event first week of January… ______________________________________________________________________ Its a shoe in that the new week will bring a lot of snowfall. Were talking 5 to 6 feet in town beginning Tuesday PM with possibly 6 to 10 feet on the upper mountain by the 27th of Dec. A Christmas Eve and Christmas
- [SnowMegeddon!  Week two suggesting storm after storm through years end!](https://mammothweather.com/2021/12/12/snowmegeddon-week-two-suggesting-storm-after-storm-through-years-end/) - 12/13/2021 Todays guidance and the ensembles, continue the trend, that this stormy period for California is just beginning and that it is likely to continue beyond Christmas. The main point here is that the eastern pacific ridge "retrogrades" during week 2 ) next week and that pulls the long wave west for more storms with
- [Temperatures going below normal for protracted period of time as WX pattern shifts into active mode…..MJO shifts into phase 7 then phase 8 with possible Major AR resulting for Ca around Christmas….question is Where?](https://mammothweather.com/2021/12/08/temperatures-going-below-normal-for-protracted-period-of-time-as-wx-pattern-shifts-into-active-mode-mjo-shifts-into-phase-7-then-phase-8-with-possible-major-ar-resulting-for-ca-around-christ/) - So the long awaited Active Pattern is shaping up nicely. Upper high in the right position feeding short waves via AK south east into long wave trof. The combo of the Thursday storm and the Sunday night through Tuesday night may dump some 6 feet of snow on the upper mountain. Amounts forecasted will adjust
- [Transition underway with unsettled weather this Monday Night and the next system Thursday bringing the potential of a foot of snow……Larger storms lurking the following week..](https://mammothweather.com/2021/12/05/transition-underway-with-unsettled-weather-this-monday-night-and-the-next-system-thursday-bringing-the-potential-of-a-foot-of-snowlarger-storms-lurking-early-the-following-week/) - Monday night: GFS seems to have resolved it’s closing offer or cutting off scenario, as the massive storm for early next week is loaded with cold Alaskan Arctic air. It’s currently depicted slowly moving into California Sunday with its baroclinic zone somewhat stalled over Central CA, Sunday night through Monday night or Tuesday. Although
- [Stagnant weather Pattern to Continue through weeks end with mild days and cool nights....Ensemble members for following week show increasing confidence for more active pattern developing toward the end of week 2](https://mammothweather.com/2021/11/30/stagnant-weather-pattern-to-continue-through-weeks-end-with-mild-days-and-cool-nights-ensemble-members-for-following-week-show-increasing-confidence-for-more-active-pattern-developing-toward-the-en/) - 12-4-21 Everything coming together nicely! Nice weekend followed by cooler weather 1st half of next week with the chance of some snow showers Monday Night. Retrogression gives the next weather system some over water trajectory for Thursday into Friday with moderate snowfall amounts possible. Storm door opens to the pacific on the 13th with
- [Another Dry Week ahead with unseasonably mild temperatures.....Pattern change later next week.....](https://mammothweather.com/2021/11/29/another-dry-week-ahead-with-unseasonably-mild-temperatures-pattern-change-later-next-week/) - The forecast this week is more of the same. Clear Skys.. Strong temperature inversions. Highs at 8000 in the low 60s and lows in the low 30s. Light winds out of the north. Longer range shows slow height falls early next week with a gradual cooling trend. Strong height falls are expected the following week
- [Thankgiving holiday forecast continues the trend of dry weather with Seasonal Temperatures....It will be warmer this holiday weekend with a bit cooler weather the second half of next week.....](https://mammothweather.com/2021/11/24/thankgiving-holiday-forecast-continues-the-trend-of-dry-weather-with-seasonal-temperatures-it-will-be-warmer-this-holiday-weekend-with-a-bit-cooler-weather-the-second-half-of-next-week/) - From 11-22-2021 ________________________________________________________________________________________________________________________________________________________________________________________ Of course just about everyone wants to know when it will snow. And although there are not any absolutes, there are some important changes in the hemispheric pattern worth giving consideration. The process of touting a storm at distance has to do with confidence in the long range progs. That confidence
- [Cooling Trend this week with some light snowfall possible Early Friday AM....Gusty winds with better snowmaking conditions later this week.....Pattern going into transition months end.....](https://mammothweather.com/2021/11/15/cooling-trend-this-week-with-some-light-snowfall-possible-early-friday-am-gusty-winds-with-better-snowmaking-conditions-later-this-week-pattern-going-into-transition-months-end/) - Sunday the 21st. Beginning 3rd trimester of fall. To confirm, -NAO teleconnection setting up this week. This is our transition. Greenland Block will force a persistent ridge over the far eastern pacific. The are storms that will try to punch through. However, any that might get through will bring wind cooling and light amounts
- [PNA pattern setting up resulting in Ridge City for the West Coast this weekend....Well above normal temperatures expected....Cooler weather by the middle of next week.....](https://mammothweather.com/2021/11/11/pna-pattern-setting-up-resulting-in-ridge-city-for-the-west-coast-this-weekend-well-above-normal-temperatures-expected-cooler-weather-by-the-middle-of-next-week/) - 11-14-2021 Beautiful Sunday afternoon in town. 65 degrees and some very light breezes. A strong temperature inversion prevails. As an example, the early morning low at 11,000 was 40 degrees. In the town of Mammoth 28 degrees at the visitors center, 33 at the Bishop AP and 21 degrees at Bridgeport. Freezing Level was14,200
- [Weak AR moving out this morning with Moderate amounts of Snowfall on Mammoth Mt....Strong Ridging expected Wednesday through Sunday with Above Normal Temps expected](https://mammothweather.com/2021/11/09/weak-ar-moving-out-this-morning-with-moderate-amounts-of-snowfall-on-mammoth-mt-strong-ridging-expected-wednesday-through-sunday-with-above-normal-temps-expected/) - 11-10-21 Update Total Snowfall as reported by Mammoth Mt 9 to 11 inches; Pattern change underway with Upper High off shore building into California this weekend with much warmer than normal temperatures expected. The upper ridge is expected to begin flattening Tuesday as a weak extension of the westerlies shifts south. The pattern middle
- [Breezy Cooler Weather this weekend with a hint of snow Sunday......More unsettled weather the early part of next week with Light to Moderate amounts of snowfall expected Monday and Tuesday...](https://mammothweather.com/2021/11/04/breezy-cooler-weather-this-weekend-with-a-hint-of-snow-sunday-more-unsettled-weather-the-early-part-of-next-week-with-light-to-moderate-amounts-of-snowfall-expected-monday-and-tuesday/) - Monday night the 8th Rfc has cut back on QPF to 1.35 inches over Yosemite. Strong winds are buffeting Mammoth tonight. Snowfall on mammoth mountain likely lower end of forecast or about a foot. 2 to 6 inches possible in town; will up date in the morning. Note; very unusual the way models
- [Dry Weekend with Seasonal Temperatures expected for Mammoth....Potentially unsettled weather expected next week....Longer range outlook for week 2 have some good chances to add to the snowpack](https://mammothweather.com/2021/10/28/dry-weekend-with-seasonal-temperatures-expected-for-mammoth-potentially-unsettled-weather-expected-next-week-longer-range-outlook-for-week-2-have-some-good-chances-to-add-to-the-snowpack/) - November 3rd at 4:30PM Models are really struggling today with the up stream amplification that drives the upper low south Tuesday. If you read my early discussion Tuesday, I had in the Cons...The concern that the surface cyclogenesis off the coast of Japan is weak and out of place. That maybe affecting the models
- [Strong AR headed for California this weekend with Copious amounts of moisture to work with Dynamically.....Snow Level to remain high until the cold air arrives late Sunday night......](https://mammothweather.com/2021/10/19/moderate-ar-headed-for-california-this-weekend-with-copious-amounts-of-moisture-to-work-with-dynamically-snow-level-to-remain-high-untill-the-cold-air-arrives-saturday-night/) - Sunday 8:10 AM Everything on track for excessive wet event for October. Accumulating snow probably Monday Morning in town. Freezing level down to Village about 800AM to 900am Monday morning. This is a little earlier now than Fridays guidance. Amounts still look good for 3 to 5 feet above 9,000 feet now as snow
- [Unsettled weather returns to the high country with light snowfall Friday, Showers Saturday and some Upslope Snowfall potential Monday Night and Tuesday.....Temperatures will be colder than normal the next 5 to 7 days.....](https://mammothweather.com/2021/10/07/unsettled-weather-returns-to-the-high-country-with-light-snowfall-friday-showers-saturday-and-some-upslope-snowfall-potential-monday-night-and-tuesday-temperatures-will-be-colder-than-normal-the/) - 10-18-2021 "Potential" for Event History for precipitation for October.......Central and Northern Sierra...... 10-17-2021 Both GFS and ECMWF global models show 1 to 3 feet of snow over Southern Mono County above 7000 feet by months end, most of which will fall next Sunday through Monday night. It may be a cold All Hollow's Eve.
- [Warming Trend peaked Thursday with little change in Temps expected for the High Country Friday.....Overall the next few weeks will be highlighted by both warming and cooling periods....Although Low temps will return to freezing by mid week....Only snow showers are expected late Monday night and Tuesday.....Another warm-up is expected into that following weekend.....A "New" Kelvin Wave is Moving into the Indian Ocean.....](https://mammothweather.com/2014/05/02/warming-trend-peaked-thursday-with-little-change-in-temps-expected-for-the-high-country-friday-overall-the-next-few-weeks-will-be-highlighted-by-both-warming-and-cooling-trends-although-low-tem/) - PDATE VIA WEATHER LETTER MONDAY AM http://data.mammothweather.com/landing/ Monday AM: Nice break in the weather for the first 2 days of the week. Time to create snow storage for the next storm cycle that will begin this Wednesday. The next series of storms will be much colder and should for the most part be
- [Upper Trof to bring fall weather the next few days with breezy cooler weather and a refreshing of our smokey skies.....Some thoughts about the upcoming winter......](https://mammothweather.com/2021/09/27/upper-trof-to-bring-fall-weather-the-next-few-days-with-breezy-cooler-weather-and-a-refreshing-of-our-smokey-skies-some-thoughts-about-the-upcoming-winter/) - Expect cooler breezy weather through Tuesday with gusts in the 40 to 50 mph range at FROPA. Expect high temps cooling to the upper 50s/low 60s in Mammoth the next few days. Nights will chill down into the upper 20s and 30s. Upper Trof will push a mostly dry cold front through our area tonight,
- [Cool Breezy Weekend on tap as a strong late Summer weather maker dives into the pacific NW and Northern CA.  Showers possible for the Northern Sierra with mainly wind and cooling for Mono County....More breezy weather possible late next week as Summer comes to an end.......](https://mammothweather.com/2021/09/14/cool-breezy-weekend-on-tap-as-a-strong-late-summer-weather-maker-dives-into-the-pacific-nw-and-northern-ca-showers-for-the-northern-sierra-look-pretty-likley-with-mainly-wind-and-cooling-mono-county/) - Quick update for the Weekend: 9/15 Several runs of the Euro has a confluence of both the Polar and at least a weak branch of the subtropical jets on Sunday. This is a departure from the GFS runs that omits this merge as well as the polar jet being a bit further north in the
- [Record heat to end Thursday as moisture streams north with the chance of showers into Friday...A warm dry weekend to follow into the early following week.....A significant cool down is in the cards for the following weekend...](https://mammothweather.com/2021/09/08/record-heat-to-end-thursday-as-moisture-streams-north-with-the-chance-of-showers-into-friday-a-warm-dry-weekend-to-follow-into-the-early-following-week-a-significant-cool-down-is-in-the-cards-fo/) - SATURDAY 9/11/2021 Discussion: Upper Trough continues to lift out with a drying trend. Two more weak trofs will pass through Sunday PM and Monday PM. Expect a light to moderate Zephyr during these trof passages then light breezes Tuesday afternoon. Stronger breezes are possible Wednesday and Thursday. Expect 3 to 4 degrees of warming
- [Meteorological Fall Begins September 1st.....So far.....Not much in our outlook other than another warm up this holiday weekend into Wednesday.....A brief period of SSE flow will bring some monsoon moisture our way, early next week....](https://mammothweather.com/2021/08/31/meteorological-fall-begins-september-1st-so-far-not-much-in-our-outlook-other-than-another-warm-up-this-holiday-weekend-into-wednesday-a-brief-period-of-sse-flow-will-bring-some-monsoon-mo/) - September 3rd Update It's the holiday weekend and lots of travelers will be up this weekend. Here is a weather update... Those that awoke in the Eastern Sierra this morning noted lots of haze and smoke. The Southwest winds associated with the Trof in the pacific NW was a double edged sword. Initially, the
- [A series of troughs has brought cooling to the high country...and helped air quality as well...Cooling will be short lived as by mid week next week the heat will be on again...](https://mammothweather.com/2021/08/18/a-series-of-troughs-has-brought-cooling-to-the-high-country-and-helped-air-quality-as-well-cooling-will-be-short-lived-as-by-mid-week-next-week-the-heat-will-be-on-again/) - So far this Summer, the southern sierra has recieved a nice break without any major fires to deal with. For that reason, our air quality has been remarkably good, compared to many eastern sierra-Great Basin regions of Northern CA. Current weather pattern is highlighted by a series of troughs from the GOA, sliding into the
- [Although were past peak for Summers warmest temps in the high country...There are plenty of weather surprises yet to come this Summer, in addition to more heat.....Tropical Storms!!](https://mammothweather.com/2021/08/06/although-were-past-peak-for-warmest-temps-in-the-high-country-there-are-plenty-of-weather-surprises-yet-to-come-this-summer-in-addition-to-more-heat-tropical-storms/) - What an amazing Summer for Climatologists this year. All kinds of records falling; and of course the mega drought in the west. Lake Oroville Hydro shut down! Current weather shows the effect of troughs in the Pacific NW and Northern CA that have created a wind shift driving smoke back into Central CA. Its pretty
- [After a quiet day today.....More Thunder expected the rest of this week...........Drier weather expected Next Week with another heat spell the following week in August](https://mammothweather.com/2021/07/27/after-a-quiet-day-today-more-thunder-expected-the-rest-of-this-week-drier-weather-expected-next-week-with-another-heat-spell-the-following-week-in-august/) - 7-27-2021 Although yesterday’s wave that pushed north through Mono County did not bring any measurable rain to Mammoth Lakes, it brought .5 inch of rain to June Lake, .22 to Crestview, .38 to Bridgeport and between .5 to 1.00 of rain to the Tamarack Fire last night. Today guidence shows more of a stable airmass
- [The Southwest and Eastern CA getting into the Meat of the Monsoon Season now with a very healthy Easterly Wave headed for AZ....We'll be Juicing up soon!!](https://mammothweather.com/2021/07/23/the-southwest-and-eastern-ca-getting-into-the-meat-of-the-monsoon-season-now-with-a-very-healthy-easterly-wave-headed-for-az-well-be-juicing-up-soon/) - 7-24-2021 Update Easterly Wave now over AZ will track off the Pacific Coast Monday. The Wave lifts north Monday AM through Southern CA arriving over the Owens Valley during the afternoon, reaching Mono Country later in the day and into the Night. For the Mammoth Area, this surge will bring precipitable water up to about
- [Small Wave moving up along coast is weakening...Nocturnal storms not as likey tonight as earlier forecasted......Best Chance for thunder and rain is Monday now.....](https://mammothweather.com/2021/07/18/small-wave-moving-up-along-coast-is-weakening-nocturnal-storms-not-as-likey-tonight-as-earlier-forecasted-best-chance-for-thunder-and-rain-is-monday-now/) - Red Flag Warning still remain in effect Today Sunday into Monday AM for abundant lighting. WIth that said, the NWS is backing off on the over night action as the main wave comes through this afternoon now. This afternoons storms will mainly affect areas that are not so smokey like Southern Mono County. Tonights action
- [Heat Wave to come to an end the upcoming week with more seasonal temps by Thursday....The Arizona Monsoon to provide badly needed rains soon.....](https://mammothweather.com/2021/07/11/heat-wave-to-come-to-an-end-the-upcoming-week-with-more-seasonal-temps-by-thursday-the-arizona-monsoon-to-provide-badly-needed-rains-soon/) - 7/17/21 6:15PM NWS has issued red flag warning for high fire danger beginning 11:00AM Sunday to 11:00AM Monday. A small system moving up from the northern Baja coast and along the Southern CA coast will increase moisture and dynamics for both afternoon and night time thunderstorms in the Sierra. In that the lower levels will
- [Sweltering Heat Wave will Peak Sunday as Upper high settles into Southern CA early next week.....Significant cooling will not occur until Thursday into Weekend......Another Heat Spell is Possible the following week with the chance of Monsoonal Flow....](https://mammothweather.com/2021/07/10/sweltering-heat-wave-will-peak-sunday-as-upper-high-settles-into-southern-ca-early-next-week-significant-cooling-will-not-occur-until-thursday-into-weekend-another-heat-wave-possible-the-foll/) - 7/10/21 Death Valley had a high of 130 on Friday. Bishop today had a high of 111 today, breaking the all time temperature record of 110 on the 10th of July 2002. These two temps within 19 years of each other are the highest temps in 125 years.... ______________________________________________________________________________________________________________________________________________________________________________________________________________ It’s not often that you
- [Scorchin Week ahead for the Deserts with Heat Wave peaking this weekend.....No Monsoons to cool in sight.....Records once again in Jeopardy....Mono Zypher to bring relief to the High Country....](https://mammothweather.com/2021/07/06/scorchin-week-ahead-for-the-deserts-with-heat-wave-peaking-this-weekend-no-monsoons-to-cool-in-sight-records-once-again-in-jeopardy/) - Excessive Heat Warning begins Wednesday through Monday for the Owens Valley with highs 105 to 110 expected. It is very possible that this crazy heat wave may last well into next week...... This Weekend, Mammoth Lakes has one of those rare oppertunities to break 90 degrees. Other 90+ degree oppertunities will continue into early next
- [Warmer than Normal Summer Forecast Coming to Fruition as our first Summer heat wave develops this Weekend.....Monsoon Rains Develop Early over the Southwest....Not Surprisingly as Summer heat Cranks Up......](https://mammothweather.com/2021/06/22/warmer-than-normal-summer-forecast-coming-to-fruition-as-our-first-summer-heat-wave-develops-this-weekend-monsoon-rains-develop-early-over-the-southwest-not-surprisingly-as-summer-heat-cranks-u/) - July 3rd: New 12Z Saturday GFS still shows Scorching Heat for next weekend in California as the dreaded 500mb 600DM isoheight invades CA Saturday into Sunday... Very warm weather to return to the Pacific NW and BC as well. More later on this developing pattern.... Thunderstorms in the Mammoth area for the most part
- [Very warm weather event for the High Country Pails compared to deadly heat wave setting up for Deserts of Eastern CA and Southern Nevada](https://mammothweather.com/2021/06/13/very-warm-weather-weather-event-for-the-high-country-pails-compared-to-deadly-heat-wave-setting-up-for-deserts-of-eastern-ca-and-southern-nevada/) - June 16 Hot day in the Owens Valley with a high temp so far of 108 at 2:50PM at the Bishop AP. That shatters the old record of 104 set back in 1958. Another high temperature record is expected tomorrow Thursday with the old record of 104 in Jeopardy. Higth Temps will liley remain at
- [After record breaking temperatures last week, a major cool down is underway with wind....Cooling and Freezing Temps possible for the high Sierra Valley's Mid Week.....This apprears to be Winters Last Gasp.........](https://mammothweather.com/2021/06/06/after-record-breaking-temperatures-last-week-a-major-cool-down-is-underway-with-wind-cooling-and-freezing-temps-for-the-high-sierra-valleys-mid-week-this-apprears-to-be-winters-last-gasp/) - June 9th Just an update during this transition from Spring to Summer. Everything on track for the short and medium range. However. the following weekend of the 18th, 19th and 20th look pretty hot throughout the Owens Valley and very warm here in the high country, if the week two models work out. Here are
- [Fabulous Holiday Weekend shaping up with above normal temperatures and possibly a few Summer Like Thunderstorms Saturday Afternoon......Summer Like Temperatures take over Sunday with record highs expected by Tuesday in the low 80s.....Looks like one more cool down later in June before Summer Pattern Sets in........](https://mammothweather.com/2021/05/27/fabulous-holiday-weekend-shaping-up-with-above-normal-temperatures-and-possibly-a-few-summer-like-thunderstorms-saturday-afternoon-summer-like-temperatures-take-over-sunday-with-record-highs-expe/) - The Deer Herd is in town, please slow down and give them a break!! June 1st 11:00AM Just an update on the pattern this week. Near or record high temperatures are expected for Mono County today through Friday. This means in this pattern, that highs will average 79 to 81 degrees which are more
- [Weather Pattern has become Decisively Cooler and at times wetter through Months End......La Nina is offically Dead according to the CPC](https://mammothweather.com/2021/05/16/weather-pattern-has-become-decisively-cooler-and-at-times-wetter-through-months-end-la-nina-is-offically-dead-according-to-the-cpc/) - The Trend is a Weatherman's Friend and model trends point toward a cooler period over the next few weeks. All models in agreememt in moving the current upper low out of California this Evening while a rather cool airmass keeps unstable air over our area through Monday. Expect both highs and Lows to remain below
- [Warmer Days through Friday with Unsettled Weekend followed by warm dry weather early next week....](https://mammothweather.com/2021/05/11/warmer-days-through-friday-with-unsettled-weekend-followed-by-warm-dry-weather-early-next-week/) - The Weather pattern across the CONUS and off into the Atlantic will become more progressive toward the weekend. Initially, there is a decently amped ridge that is spreading over CA at the moment. It will result in some 7 to 10 degrees of warming through Friday. High Temps in Mammoth have been in the low
- [Typical May weather on Tap with periods of Warming and Cooling into next week....](https://mammothweather.com/2021/05/03/typical-may-weather-on-tap-with-periods-of-warming-and-cooling-next-chance-of-some-showers-sunday-and-monday-and-again-later-next-week/) - Looking at todays 12Z ECMWF day 5 means, it is apparent that although no significant storms are in the picture. There will be additional short wave Trofs that will deepen over the Northern Great Basin, producing a few showers during periods of daytime heating, into early next week. Warmer weather is expect the middle of
- [Late Winter Like Storm To bring Wind, Snow and Cold this weekend into early next week.....Warmer weather is expected Wednesday through Friday.....](https://mammothweather.com/2021/04/23/late-winter-like-storm-to-bring-wind-snow-and-cold-this-weekend-into-early-next-week-warmer-weather-is-expected-wednesday-through-friday/) - After a mellow day today....A late winter like storm will bring Wind, Cooling and Snow to the High Country This weekend into early next week... For the Fisher Folks at the opener Saturday AM out at Lake Crowley, Here is an excerpt from this mornings weather discussion from NWS Reno: For Saturday, the main weather
- [Some unstable air to bring Showers Wednesday followed by a fair warm Friday and Saturday......Late Season Storm Possible as MJO now strongest in Phase 7/8 in several years modulates the westerlies during week 2.....Moisture from Surigae may be entrained.....](https://mammothweather.com/2021/04/19/some-unstable-air-to-bring-showers-wednesday-followed-by-a-fair-warm-friday-and-saturday-late-season-storm-possible-as-mjo-now-strongest-in-phase-7-8-in-several-years-modulates-the-westerlies-dur/) - Thursday 4/22/2021 Quick Update about weather changes this weekend and Fishing Opener... No wind advisories expected for Mono County Saturday, however, SW winds will come up overnight with gusts 15 to 30 MPH with stronger gusts expected in the late morning and afternoon. It is likely to be choppy out on Lake Crowley, however, at
- [Chilly Upper Low over the Far West expected to bring light snow to the High Country Wednesday before Exiting Thursday......Fair Warmer weather expected for the weekend...](https://mammothweather.com/2021/04/13/chilly-upper-low-over-the-far-west-expected-to-bring-light-snow-to-the-high-country-wednesday-before-exiting-thursday-fair-warmer-weather-expected-for-the-weekend/) - It was quite the windy day across Mono County Tuesday as an area of low pressure deepened along the Northern CA/NV Border. Winds were clocked above 60 MPH in the mid afternoon in Bishop. The High Wind warning well advertised by the NWS nailed it! Cold Air advection poured into Mono County during the Mid
- [Breezy Weather with above normal temps to continue into the weekend....Possible pattern change middle of next week](https://mammothweather.com/2021/04/08/breezy-weather-with-above-normal-temps-to-continue-into-the-weekend-possible-pattern-change-middle-of-next-week/) - It's that time of the year again. Breezy afternoon and evenings are likely to continue for some time as we remain sandwiched between a subtropical ridge and trofing to our north. The upper jet is split too with the northern branch sending short wave trofs into the pacific NW and northern Rockies. Each one of
- [Spring weather has Sprung with a warm day expected Sunday....Dry Cold Front to bring Cooling and Wind Tonight through Tuesday with another warm-up Mid Week......Easter Sunday and beyond may be unsettled......](https://mammothweather.com/2021/03/28/spring-weather-has-sprung-with-a-warm-day-expected-sunday-dry-cold-front-to-bring-cooling-and-wind-tonight-through-tuesday-with-another-warm-up-mid-week-easter-sunday-and-beyond-may-be-unsettl/) - 3-31-2021 10:50AM (UPDATE) High pressure builds over CA today with ridging into Friday. Above normal temps are expected into the weekend with highs in the mid to high 50s in Mammoth with lows mostly in the 20s. Winds will be light today and Thursday. The weekend weather shows periods of high clouds as SW flow
- [Cold Great Basin Low brings light upslope snowfall to the high country Tuesday......Another on the way for Thursday....Then a fair warm spring weekend and beyond as MJO on the Move!](https://mammothweather.com/2021/03/23/cold-great-basin-low-brings-light-upslope-snowfall-to-the-high-country-tuesday-another-on-the-way-for-thursday-with-a-fair-warm-spring-weekend/) - 3-25-2021 Update No change in our weekend outlook: Addition to the outlook is a system that appears to be deepening a bit more over the Northern Great Basin Monday. Not enough to bring any precip. However, enough to bring some temporary cooling Monday to this weekends warm up. Although the cool down will be
- [Clearing Sky's Tuesday AM......Next Weather system is looking drier for Friday but may still drop another foot in the upper elevations.....Unsettled weather expected into Monday next week.....](https://mammothweather.com/2021/03/16/clearing-skys-tuesday-am-next-weather-system-is-looking-drier-for-friday-but-may-still-drop-another-foot-in-the-upper-elevations-unsettled-weather-expected-into-monday-next-week/) - Latest ITV Integrated transport system for the GFS showed a much weakened AR signal this morning with border line weak AR of 250 IVT MAG [KG/(MS)]; while the EURO had no AR signal at all for the same period now. (Friday AM) So the prospects for an AR of significance is now gone this weekend.
- [Up to 20 inches of fresh on Mammoth Mt Today.....Upslope snowfall to end this evening.....Next Storm Monday with another the end of the week.....](https://mammothweather.com/2021/03/12/up-to-20-inches-of-fresh-on-mammoth-mt-today-upslope-snowfall-to-end-this-evening-next-storm-monday-with-another-the-end-of-the-next-week/) - Sunday 1`:30PM.....Its later than you think!! ;-) No changes of the snowfall estimates for tonight and Monday as stated below. Winter Weather advisories were hoisted by the NWS beginning late tonight into Monday Evening. The mid-week period still looks dry, however, as also stated below, the next storm for the next weekend looks much warmer
- [Active Pattern returns to the Sierra as a series of cold storms begin their March into the West Coast next week.....](https://mammothweather.com/2021/03/03/active-pattern-returns-to-the-sierra-as-a-series-of-cold-storms-begin-their-march-into-the-west-coast-next-week/) - 4:35pm Sunday Models still beating the drum of a cold moderate storm. 6 to 18 inches with the average snowfall amount of about a foot. This is mainly a Tuesday through Thursday storm. There are several more systems expected the following week. More later...... The Dweeber......................... ___________________________________________________________________________________________________________________________________________________________________________________________________________________ It's March.....And what we would normally expect
- [Northwest Flow to continue for the foreseeable future....The Cold in the east shifts out over the Atlantic next week and by next weeks end...The West turns cooler.....](https://mammothweather.com/2021/02/18/northwest-flow-to-continue-for-the-foreseeable-future-the-cold-in-the-east-shifts-out-over-the-atlantic-next-week-and-by-weeks-end-the-west-turns-cooler/) - 2/25/21 4:07pm Longer Range: Prospects are still good for a Storm that begins next weekend the 6th. The European shows the IVT Atmospheric River tools in the weak range at our latitude. The Euro also shows a rather large broad slow moving trof developing off the west coast that weekend into the middle of that
- [Northwest Flow to Continue with another Small Breezy System Friday then warmer the end of the week into next....](https://mammothweather.com/2021/02/16/northwest-flow-to-continue-with-another-small-breezy-system-friday-then-warmer-the-end-of-the-week-into-next/) - The Eastern Pacific ridge out some 1200 miles off shore along with the Western Atlantic Ridge off the East coast is keeping Arctic Air intrenched in the nations mid section. Below Zero temperature's are common throughout much of the the mid west and Great Lakes States.... This is a pattern that will last more often
- [UGLY NW Jet Approaching Central CA Saturday...Its a powerhouse....Some areas may have damaging winds on Saturday.....Another is in the works for possibly Monday night and Tuesday......](https://mammothweather.com/2021/02/12/ugly-nw-jet-approaching-central-ca-saturday-its-a-powerhouse-some-areas-may-have-extreem-winds-onsaturday-another-is-in-the-works-for-possibly-monday-night-and-tuesday/) - High WInd Warning was issues by the National Weather Service beginning at 6:00AM Saturday to 4:00PM Saturday High Wind Warning in effect from February 13, 06:00 AM PST until February 13, 04:00 PM PST Stay in Touch with the advisories from the National Weather Service as they will be watching this developing situation through out
- [Bias Toward Undercutting is increasing next week as models trend wetter.....Model Consensus not strong yet.......](https://mammothweather.com/2021/02/07/bias-toward-undercutting-is-increasing-next-week-as-models-trend-wetter-model-consensus-not-strong-yet/) - Monday AM: There looks to be two periods of significant precipitation. Thursday night into Friday AM and Saturday Night into Sunday. The Dweebs do not have a lot of confidence in amounts yet. The Experts at CRFC gave the west side near Huntington Lake close to 3.00 of water between Thursday and Sunday AM.....That's pretty
- [Pattern change again spells drier outlook as next system splits....Limiting precipitation for the Central Sierra.](https://mammothweather.com/2021/01/31/pattern-change-again-spells-drier-outlook-as-next-system-splits-limiting-precipitation-for-the-central-sierra/) - 2-2 -2021 Ground hog no help this morning...... QPF on the decline with 1 to 3 inches forecasted...we’ll be lucky to get an inch in town... Hi temps in town expected in the 30s next few days with weekend temps in the upper 40s. Lows in the teens and twenties. The weather will be cooler
- [Cold Storm from the Gulf of Alaska With Moderate AR to bring Heavy Snowfall Wednesday and Thursday...Weekend looks Showery with another Storm and Smaller AR Monday and Tuesday....](https://mammothweather.com/2021/01/26/cold-storm-from-the-gulf-of-alaska-with-moderate-ar-to-bring-heavy-snowfall-wednesday-and-thursday-weekend-looks-showery-with-another-storm-and-smaller-ar-monday-and-tuesday/) - All systems look go for major snow producer Wednesday and Thursday with 3 to 5 feet possible in town and between 5 and 9 feet over Mammoth Mt. by Friday. This AR is considered moderate. A (2) on a scale of 1 to 5. This scale considers duration of the event and moisture transport. (IVT)
- [Major Sierra Storm headed for the Sierra....Winter Storm Watch for Mono County and the Owens Valley Tuesday Night through Thursday Night.....Cutting through the hype of the Atmospheric River Forecast........](https://mammothweather.com/2021/01/24/major-sierra-storm-headed-for-the-sierra-major-snowfall-expected-wednesday-and-thursday-cutting-through-the-hype-of-the-atmospheric-river-forecast/) - New update from CRFC at 12:21 PM shows about a 15% reduction in the QPF over this mornings output. Huntington Lake now 10.83 in Yosemite now 8.45 in So as an average 9.64 west of Mammoth Mt Most of which will fall by Friday AM.... (8 to 10 feet) at
- [Series of Storms are knocking on the Sierra Front with Cold Systems making their way down the coast....Then Bottling Up/Stalling over the state early next week....Better progressive pattern later next week....](https://mammothweather.com/2021/01/21/series-of-storms-are-knocking-on-the-sierra-front-with-cold-systems-making-their-way-down-the-coast-then-botteling-up-stalling-over-the-statejanuary/) - 1-22-2021 Update Models trending a bit wetter for the first system. It is not wet by any means but my get a few more inches of snow out of it. Here are the Dweebs best guesses.... Friday night into Saturday, 1 to 3 inches in town, 3 to 6 on the mountain by Saturday PM
- [Retrogression in process with first in series of systems initiating a strong Mono Wind Event for Tuesday.....Much cooler weather on the way!](https://mammothweather.com/2021/01/17/retrogression-in-process-with-first-in-series-of-systems-initiating-a-strong-mono-wind-event-for-tuesday-much-cooler-weather-on-the-way/) - After several days of beautiful weather, big changes are coming to our weather pattern. Currently, as expected, retrogression of the Eastern Pacific High is in progress. The first system will be headed in Monday AM with some snow showers and another one fast on its heals for late Monday night into Tuesday night. The Tuesday
- [Strong Ridging Develops the next two days with very mild temperatures for the high country.....Highly Amped ridge will begin to slowly retrograde early next week with cooling....Weather to remain dry through the 21st with a major change in the pattern taking place over the following weekend....](https://mammothweather.com/2021/01/13/strong-ridging-develops-the-next-two-days-with-very-mild-temperatires-for-the-high-country-highly-amped-ridge-will-begin-to-slowly-retrograde-early-next-week-with-cooling-weather-to-remain-dry/) - Our Weather in Mammoth is way too nice for the middle of January! The Dweebs were in short sleeve shirts today as highs approached 60 degrees in Town. Lows at night are now above freezing..... It will be warmer the next few days as the current ridge Trof pattern peaks out. Remarkably, It is quite
- [Flat Dirty Ridge to become highly amplified next week as Polar Vortex desends southward......Our Long Range Dry Outlook is not set in stone!!](https://mammothweather.com/2021/01/08/flat-dirty-ridge-to-become-highly-amplified-next-week-as-polar-vortex-desends-southward-our-long-range-outlook-dry-outlook-is-not-set-in-stone/) - The Strato Warming is in process. Temperatures have risen strongly over the stratosphere above the arctic, increasing high pressure below in the troposphere. It will be interesting to see what the long range models will do with the Polar Vortex's over the coming weeks. Over the western hemisiphier, the global models at 500MB show the
- [Global forecast models have back peddeled on precipitation prospects for the month of January.....Occasional fast moving systems likely to bring only light amounts for Mono County](https://mammothweather.com/2021/01/04/global-forecast-models-have-back-peddeled-on-precipitation-prospects-for-the-month-of-january-occasional-fast-morving-systems-likely-to-bring-only-light-to-moderate-amounts-for-mono-county/) - Tuesday Jan 5th; Central and Eastern Sierra to remain dry another 2 weeks..... Although there are a few more fast moving short waves that will pass through mainly Northern CA the next 7 days, none are expected to bring any signifacant precipitation to the Eastern Sierra. Last nights wind storm brought 3 to 4 inches
- [Will SSW be the Trigger that Saves California from drought this year?](https://mammothweather.com/2020/12/30/will-ssw-be-the-trigger-that-saves-california-from-drought-this-year/) - A "Major" Sudden Stratospheric warming event is underway over the Arctic at the moment. One that may change the course of one the driest beginnings of Winter to the Central and Southern Sierra in years..... The SSW, (Sudden Strato Warming Event) is a process that can rapidly warm the stratosphere of over 100F at times,
- [A transitory Ridge to bring a Sunny Day Wednesday...Followed by increasingly cloudy sky's Thursday....Active pattern to Resume Friday night into early next week....Snowfall amounts in the light to moderate amounts........](https://mammothweather.com/2020/12/23/a-transitory-ridge-to-bring-a-sunny-day-wednesday-followed-by-increasinglty-cloudy-skis-thursday-active-pattern-to-resume-friday-night-into-early-next-week-snowfall-amounts-in-the-light-to-mod/) - 12-25-2020 Models have come in drier with system tonight and Saturday.. 1 to 6 inches over the Sierra at elevations above 6500 feet. next system is colder for Sunday night and Monday.. However, it too will be a light precip producer for the east side. Two to 6 inches...... it will be colder than normal
- [Life is good on the Dark Side of the Sun.............](https://mammothweather.com/2020/12/21/life-is-good-on-the-dark-side-of-the-sun/) - Today's a special day... It's the shortest day of the year in the Northern Hemispheric. The suns rays are at their greatest angle away from us...Our day-light is at its dimest.....It feels like were on the Dark Side of the Sun..... However, its a very special night tonight as the Grand Conjuction of both Saturn
- [Storm Total Approaching 12 inches on Mammoth Mt......5 to 8 in town....Weather goes dry through Christmas....Pogonip Fogs Return this weekend over Lower Elevation Eastern Sierra Lake Basins](https://mammothweather.com/2020/12/17/storm-total-approaching-12-inches-on-mammoth-mt-5-to-8-in-town-weather-goes-dry-through-christmas-pogonip-fogs-return-this-weekend-over-lower-elevation-eastern-sierra-lake-basins/) - _______________________________________________________________________________________________________________________________________________________________________________ December 18th Storm Total 12 to 15 inches... The Forecast is now dry through Christmas day. Temperature inversions will allow Pogonip fogs to develop over nearby lakes from time to time when east winds are not breezing... High temps will move into the 40s this weekend with lows in the teens.....It is
- [Beautiful Weekend shaping up with above normal temperatures at resort levels and Pogonip fog in the valleys.....Cold inside slider to bring chilly weather Tuesday and Wednesday with as possible dusting Tuesday......Snowfall chances increase Christmas weekend....](https://mammothweather.com/2020/12/19/beautiful-weekend-shaping-up-with-above-temperature-at-resort-levels-and-pogonip-fogs-in-the-valleys-cold-inside-slider-to-bring-chilly-weather-tuesday-and-wednesday-with-as-possible-dusting-tuesd/) - It is a spectacular weekend here in the high country with highs in the upper 40s to low 50s....High pressure this weekend will give way to a cold inside slider Tuesday. High temps will cool a good 15 degrees Tuesday with a dusting of light snow expected. The weather will warm up Wednesday into Christmas
- [Light Snowfall is expected in town today with light to low end moderate amounts on Mammoth Mt by mid morning Monday.....A moderate storm is expected Wednesday night and Thursday....](https://mammothweather.com/2020/12/13/light-snowfall-expected-in-town-today-wioth-light-to-low-end-moderate-amounts-on-mammoth-mt-by-mid-morning-monday-a-moderate-storm-expected-wednesday-nigth-asnd-thursday/) - December 15th, 2020 Another light to moderate snow producing storm in on its way for Late Wednesday and Thursday.... Taking a good look at the next weather system, It is not all the impressive QPF wise as compared to the last storm. The last system dropped between 10 amd 12 inches on top of Mammoth
- [New Development over Western Pacific lends confidence to progged Storm in the Week Two forecast period....More below.....](https://mammothweather.com/2020/12/06/new-development-over-western-pacific-lends-confidence-to-progged-storm-in-the-week-two-forecast-period-more-below/) - Dec 9th.... After a day of high clouds....with little change of temps, winds will increase Thursday as an inside slider approaches and moves through our area Thursday night and Friday AM. It will be a chilly day Friday with highs in the 30s with breezy weather. Measurable precipitation chances are slim and none but a
- [Although current dry pattern over the far west continues....A few small systems may bring some breeze, cooling and light snow or snow showers early next week and the 11th......](https://mammothweather.com/2020/12/02/although-current-dry-pattern-over-the-far-west-continues-a-few-small-systems-may-bring-some-breeze-cooling-and-light-snow-or-snow-showers-early-next-week-and-the-11th/) - 10:15AM Thursday the 3rd. Yesterday, a system droping south from the mid-west to the Texas Panhandle spread cooling through the desert southwest where it reached the Eastern Sierra over night. As a result, it was a cooler morning in Bishop CA with a low of 18 degrees and Mammoth with a low of 16. Today,
- [November to Go Out on a Dry Note with December Looking Much the Same.....La Nina Running the Show....](https://mammothweather.com/2020/11/28/november-to-go-out-on-a-dry-note-with-december-looking-much-the-same-la-nina-running-the-show/) - Its Definetly a Dry Nina this year, with strong convection confined over the tropics over the far western pacific... The MJO will stall over the phase 5 area Maritime Pacific/Western Pacific and it will be Ridge City "into" the 2nd week of Dec.....There is a system indicated toward the middle of the month. However, little
- [Storm Total 6 to 9 inches......Upper jet to pull through this weekend with mainly dry weather expected.....MJO moving into Circle of Death....](https://mammothweather.com/2020/11/19/storm-total-6-to-9-inches-upper-jet-to-pull-through-this-weekend-with-mainly-dry-weather-expected-mjo-moving-into-circle-of-death/) - Saturday 11/21/2020 Series of Northwest sliders will bring periods of breeze, cooling and maybe a few flurries or showers. 1st slider moves through Monday the 23rd, another Thanksgiving and the last in the series on the 30th. That one on the 30th may pinch off a closed low and give us some snow showers. Will
- [Breezy Today...Windy tonight! .....Light snowfall expected in town with low end moderate amounts over the crest Wednesday....](https://mammothweather.com/2020/11/17/breezy-today-windy-tonight-light-snowfall-expected-in-town-with-low-end-moderate-amounts-over-the-crest-wednesday/) - Lots of wind today but so far, not nearly as much as we had last Saturday..... The main upper jet comes in tonight just to the north of us. So winds should get stronger tonight and really Howell by Midnight!. Again the Main theme here is that the upper jet is still to our north
- [Drier Medium Range.....Recap of weather past week.....New Indian Ocean MJO Event Possible in our future.....](https://mammothweather.com/2020/11/12/drier-medium-range-recap-of-weather-past-week-new-indian-ocean-mjo-event-possible-in-our-future/) - Lucky Friday the 13th.... Mammoth Mt opens for the season.... See: http://www.mammothmountain.com I Just finished looking at this mornings guidence and the many weather sites around. Lots of discuessions! Lots of pretty maps! What do thay all mean? Then I remembered what an old friend of mine that used to work for the National Weather
- [Cold Winter Like Weather to bring snowshowers over Mammoth Mt today along with Mid Winter Temperatures.....After a break early next week another wetter storm moves in Friday......](https://mammothweather.com/2020/11/08/cold-winter-like-weather-to-bring-moderate-snowfall-over-mammoth-mt-today-along-with-mid-winter-temperatures-after-a-break-early-next-week-another-wetter-storm-moves-in-friday/) - Tuesday AM the 10th: Beautiful morning with Mammoth snow covered. Cold with morning lows in the single digits and teens. Weather pattern this morning shows NW flow with short wave bringing high clouds to our area. Precip in Pacific NW with sheering trof and energy forecasted mainly east over the Northern Rockies. A warm air
- [Another 3 to 4 days of Mild Weather then Major Pattern change this weekend to one of which is much colder with.......Snowfall......30 degree drop in temperatures expected by Sunday.....](https://mammothweather.com/2020/11/02/another-3-to-4-days-of-mild-weather-then-major-pattern-change-this-weekend-to-one-of-which-is-much-colder-with-snowfall/) - 10:00AM Wednesday the 4th of November.... Not much change to the forecast other than the Sunday system may be a little colder. System one is slowing a bit which is a good point. Most of the precip will be behind the front. CRFC is painting between 4 and 5 tenths between Huntington Lake and Yosemite.
- [Beautiful Sunny Mild Days and chilly nights on tap through the Weekend.....Forecast models continue to hang on to the ENE flow a bit longer.....So Smoke to remain west for another day....MJO on the Move.....](https://mammothweather.com/2020/10/29/beautiful-sunny-mild-days-and-chilly-nights-on-tap-through-the-weekend-forecast-models-continue-to-hang-on-to-the-ene-flow-a-bit-longer-so-smoke-to-remain-west-for-another-few-days-mjo-on-t/) - 10:40AM Saturday; All Hallows Eve Mother Nature is giving us a nice day today as winds at 10,000ft (500MB) increased out of the ENE to 25MPH after 5:00AM this morning. Those ENE winds will continue today. This will give us a steller day with clear skys and warm temps by early afternoon. Winds will continue
- [North East Wind Subsiding over the Crest Today....Might be a bit of haze Thursday....Friday into the Weekend looks a bit unhealthy Air Quality Wise....MJO Presenting some interesting possibilities....](https://mammothweather.com/2020/10/28/north-east-wind-subsiding-over-the-crest-today-might-be-a-bit-of-haze-thursday-friday-into-the-weekend-looks-a-bit-unhealthy-air-quality-wise-mjo-presenting-some-interesting-possibilities/) - As highlighted....Our NE winds are subsiding as high pressure from the west spreads into CA. At the sametime, the upper low over the Desert SW is moving east. So the NE gredient weakens and terrain driven wind systems can allow the smoke and or haze to move back into the south county, as early as
- [Mono Wind Event Set for the West Side of the Sierra Sunday Night.....Smoke to Begin Clearing Sunday Morning...However, Models are slower with NE flow developing...Now not untill this evening......Colder Weather Ahead...](https://mammothweather.com/2020/10/23/mono-wind-event-set-for-the-west-side-of-the-sierra-sunday-night-smoke-to-begin-clearing-later-saturday-with-good-air-quality-sunday-and-monday-colder-weather-ahead/) - Sunday 11:40AM 12Z WRF is slower to back the flow out of the NNE today. The latest guidence pushes it back to between 5:00PM and 8PM Sunday tonight. Good news is that once the NE flow sets in, It should be around through Wednesday Evening... Looking at a cold night tonight with lows in
- [Its the end of the 70s.....And welcome to the big chill?   Best throughts would be to clean up Mammoth's Air this weekend!....Before it gets warmer again!](https://mammothweather.com/2020/10/21/its-the-end-of-the-70s-and-welcome-to-the-big-chill-best-throughts-would-be-to-clean-up-mammoths-air-this-weekend-before-it-gets-warmer-again/) - Were on the home stretch ending the month of October. The MJO is stuck in phase 5, and for this time of the year, because of where the tropical convection is over the far Western Pacific, the Rossby Wave train is up and over the top of the "far west". Actually, the fact that the
- [Little change in the Forecast with Poor Air Quality through Wednesday....Transitional pattern underway as MJO finally forecasted through phase spaces 6 and 7......Major Cooling expected over the next Weekend...](https://mammothweather.com/2020/10/18/little-change-in-the-forecast-with-poor-air-qual-through-wednesday-transitional-pattern-underway-as-mjo-finally-forecasted-through-phase-spaces-6-and-7-major-cooling-expected-over-the-next-wee/) - Little in the way of change in sensable weather the next few days.... Highs in Mammoth will be in the low 70s with lows in the mid 30s. Expect very light NE breezes in the morning but not enough to help much in the poor air quality as westerly flow will resume later in the
- [High Pressure aloft over the far west will continue with light winds.....Warmer than normal temperatures and more often than not...Smoky Skies for Mammoth untill better control is gained over the Creek Fire....](https://mammothweather.com/2020/10/17/high-pressure-over-the-far-west-will-continue-with-light-winds-warmer-than-normal-temperatures-and-more-ofdtern-than-not-smoky-skies-for-mammoth/) - After a decent day yesterday Friday, the smoke rolled in again early this morning with PM 2.5 counts in the hazardous range. There was a wind shift noted at 8:00AM from the north that will improve our air quality for a while this morning. Howver the flow backs from the west again this afternoon and
- [Eastern Pacific Ridge Will Dominate the Weather This Week with Above Normal Temps.....Off Shore Flow to highlight the weather Wednesday with good air quality returning....](https://mammothweather.com/2020/10/12/eastern-pacific-ridge-will-dominate-the-weather-this-week-with-above-normal-temps-off-shore-flow-to-highlight-the-weather-wednesday-with-good-air-quality-returning/) - Saturday AM Updating.................. Thursday 8:15 PM the 15th Nasty Morning in Mammoth Thursday with PM 2.5 counts off the chart. Good air quality tonight, but tomorrow...the smoke models stink us up again. This time with out a break in the afternoon... The weekend does not look great but stay tuned, I will
- [Smokey Days and Nights likely to continue through Mid Week.....Moisture from Tropical Storm Maria may bring upper elevations of Mammoth Mt an inch or two of snow Friday night.....Models doing poor job in forcasting weekend storm...](https://mammothweather.com/2020/10/05/smoky-days-and-nights-likely-to-continue-through-mid-week-moisture-from-tropical-storm-maria-may-bring-upper-elevations-of-mammoth-mt-an-inch-or-two-of-snow-friday-night-models-doing-poor-job/) - Thursday PM: Ugly!! That what I see for next 2 weeks. I love Falls in October that have cool spells. The pattern next week does feature some NNE Breeze which will help with the smoke a little but nasty fire weather ahead for California with high temperatures well above normal later next week! Its likely
- [Smoke for Creek Fire to Retreat again Thursday....Upper Ridge Breaks Down this Weekend.....Slow Cooling Trend Next Week.....Slight chance of showers by Thursday the 8th.....Windy Cooler Weather to close out next week.....](https://mammothweather.com/2020/09/30/smoke-for-creek-fire-to-retreat-again-thursday-upper-ridge-breaks-down-this-weekend-slow-cooling-trend-next-week-slight-chance-of-showers-by-thursday-the-8th-windy-cooler-weather-to-clo/) - Wednesday 11:10 AM: Smoke rolled in Tuesday as expected. Expect another day of poor air quality today Wednesday. This high pressure system aloft, (upper ridge) has been behaving in a manor that gave Northern CA strong east winds Sunday, NE winds to the Eastern Sierra Monday. The upper high has two lobes. Sunday and Monday
- [Beautiful Clear Day Monday will Give Way to some smoke Tuesday....Then Better Air Quality Wednesday.....PNA Pattern to break down this weekend, leading to better weather for the fire fighters](https://mammothweather.com/2020/09/28/beautiful-clear-day-monday-will-give-way-to-some-smoke-tuesday-then-better-air-qual-wednesday-pna-pattern-to-break-down-next-week/) - 9:45 PM Monday Monday nights Rapid Refresh Smoke model really pushes the smoke back into Mammoth during the afternoon hours Tuesday....More hacking and coughing ahead.... ________________________________________________________________________________________________________________________________________________________ The highly amplified pattern across the pacific and North America, responsible the for heightened fire season is still in play. This is actually +PNA Redux. Its a very similar
- [Summer goes out on a quiet note and Autumn Equinox arrives at 6:31 AM Local time Tuesday.....Some Increase in SW breeze this week then Quiet weather Wednesday and Thursday with more breeze Friday......Another heat spell on the Horizon...](https://mammothweather.com/2020/09/21/summer-goes-out-on-a-quiet-note-and-autume-equanox-arrives-at-631-am-local-time-tuesday-some-increase-in-sw-breeze-this-week-then-quiet-weather-wednesday-and-thursday-with-more-breeze-friday/) - The Tempo really picking up in the long range with potential for record high temps early next week and more critical fire weather, Beginning Sunday and well beyond.......See discussion from two days ago below. _____________________________________________________________________________________________________________________________________________________________________________________________ Today is the last full day of Summer. Like many days of 2020, I am looking forward to getting on
- [Light Rains Overnight brought Air Quality Relief and Lifted Spirits of Residences of Mammoths as Creek Fire's growth slowed....Upper Jet and Surface front still concerning this afternoon.....Creek fire smoke still in our future...](https://mammothweather.com/2020/09/18/light-rains-overnight-brought-air-quality-relief-and-lifted-residences-of-mammoths-spirits-as-creek-fires-growth-slowed-upper-jet-and-surface-front-still-concerning-this-afternoon-creek-fire/) - Residents of Mammoth woke up to a pleasant surprise with a light rain falling from our skies. Moisture from remnants of tropical depression Karina was channeled across, mainly Southern Mono County, bringing 1/4 inch of rain as measured by the RAWs site at Devils Post Pile. The rain had stopped, however, the airmass continues to
- [Extremely Hazardous Air Quality Conditions continue throughout Mono County.....Cold Front approaching Mono County Thursday.....All eyes are on the Weather!](https://mammothweather.com/2020/09/16/extremely-hazardous-air-quality-conditions-continue-throughout-mono-county-cold-front-approaching-mono-county-thursday-all-eyes-are-on-the-weather/) - If you weren't able to tune in to last night's community presentation about the Creek Fire, you can view it here: https://www.facebook.com/townofmammothlakes/videos/685327858759647 Its been reported by other media sources that the Creek Fire has burned over 220,000 acres. Great Basin Monitoring had extremely hazardous air quality conditions for Mammoth the past few days. It appears
- [Zephyr Breezes to transport more smoke.....Troughing this week increases SW flow......Dry weather the next 7 days....](https://mammothweather.com/2020/09/12/zephyr-breezes-to-transport-more-smoke-toughing-this-week-next-week-increases-sw-flow-dry-weather-the-next-7-days/) - Once again smoke moved into our area from the SW with resulting poor air quality. The advancing cloud of smoke from the Creek Fire, seen by many was the leading edge of a late afternoon zephyr that brought hazardous air quality to our immediate area. PM 10 counts were well over 600 parts per million.
- [Air quality improved from last night....Update on the Fire from the Chief.......Weather Outlook...](https://mammothweather.com/2020/09/11/air-quality-improved-from-last-night-update-on-the-fire-from-the-chief-weather-outlook/) - A message from Frank Frievalt Fire Chief, Mammoth Lakes Fire Protection District The Quick Facts: The Creek Fire is the closest fire to Mammoth Lakes and is the source of the majority of the smoke impacts. There is no current or projected evacuation order for the Town of Mammoth Lakes at this time. Based on the
- [Rumors of Fire in Reds Meadow put to bed as drift smoke from Creek Fire moves east.....A Dense Smoke Advisory is in effect for Mono County.....](https://mammothweather.com/2020/09/10/rumors-of-fire-in-reds-meadow-put-to-bed-as-drift-smoke-from-creek-fire-moves-west-a-dense-smoke-advisory-in-in-effect-for-mono-county/) - 7:30pm: Air quality is off the chart; at 7:30pm air now reported the PM10 count was 1818; the PM 2.5 was 826. These readings are probably historic for this area. Stay indoors, do not go outside as air quality is very hazardous this evening.. Update regarding fires distance to Mammoth Lakes. Fire Chief
- [Record Smashing Heat Wave on this holiday weekend for California....Clearing up misconceptions about Mammoth Lakes temperatures....](https://mammothweather.com/2020/09/04/record-smashing-heat-wave-on-this-holiday-weekend-for-california-clearing-up-misconceptions-about-mammoth-lakes-temperatures/) - Sunday 3:40PM September 6th. For documentation, excerpt from LOX discussion: EPIC Heat Event: The ingredients for this unprecedented heat wave were perfect today, with morning soundings showing a warm layer of 96 to 102 deg from about 1600-3200 feet, LAX-DAG gradient were significantly offshore to the N and E and continued offshore into the
- [End of August to be seasonal....Next Heat Wave Shaping up 2nd half of next week through Holiday Weekend....](https://mammothweather.com/2020/08/28/typical-end-of-august-weekend-shaping-up-next-heat-wave-shaping-up-2nd-half-of-next-week-through-holiday-weekend/) - Monday Night; August 31st. All systems go for excessive heat event for California.... Quick look at new GFS 00z Tuesday Sept 1st, shows the same ugly 600DM at 500MB upper high over Nevada Saturday afternoon and it stays right around that strong through Sunday PM. 850 MB temps warm through Sunday. The upper high weakens
- [The last week of August should be pretty uneventful with warm sunny days....periods of haze and cooler nights....Meteorological Summer comes to an end....Heat returns to CA on September 3rd and builds through Labor Day weekend....100s in LA and Bishop....80s in Mammoth](https://mammothweather.com/2020/08/25/the-last-week-of-august-should-be-pretty-uneventful-with-warm-sunny-days-periods-of-haze-and-cooler-nights-meteorological-summer-comes-to-an-end/) - The highlights of the last post was subtropical moisture that brought some thunder and brief heavy rain showers Monday afternoon. Our highs have been in the low to mid 80s and have recently pulled back into the mid 70s. Yesterday Monday, we had southerly flow and that brought up smoke from the Sequoia Fire.
- [Pattern Change initiates Dry SW flow aloft for drying trend into Friday.....Although little change in temps are expected for Mammoth Lakes.....Subtropical Moisture returns at weeks end...](https://mammothweather.com/2020/08/19/pattern-change-initiates-dry-sw-flow-aloft-for-drying-trend-into-friday-although-little-change-in-temps-are-expected-for-mammoth-lakes/) - RECAP: Yes its been been very warm to hot across the State. Down in Southern California, the protracted heat wave has caused misery for many. At resort levels at Mammoth Lakes, we actually had some very pleasant weather over the weekend with highs in the 70s. That was because when we really moisten up, we
- [After an overall mild Summer, Southern CA will experience its first long term heat and humidly wave this weekend into next week....](https://mammothweather.com/2020/08/12/after-an-overall-mild-summer-southern-ca-will-experience-its-first-long-term-heat-and-humidly-wave-this-weekend-into-next-week/) - Saturday AM update: The hottest dome of air of the Summer is expected to continue building today through Tuesday. A 600+DM at 500MB subtropical high builds into South Eastern Nevada with 600DM iso heights extending to the CA NV boarder Monday and Tuesday. This is quite the heat pump. Upper Flow will be mainly SSE
- [Late July Heat wave on tap as subtropical high sets up over Southern California today....Pattern is Dry through the weekend....Isolated thunderstorms return the following week....](https://mammothweather.com/2020/07/28/late-july-heat-wave-on-tap-as-subtropical-high-sets-up-over-southern-california-today-pattern-is-dry-through-the-weekend-isolated-thunderstorms-return-the-following-week/) - TGIF Everyone.... As we come to the end of July, The Dweebs have come to the realization that its been an A-Typical Summer. The June Gloom season has lasted much longer than usual along the southern coasts of California. LA has not had any significant heat waves so far. The waters off the Southern CA
- [Weak Upper level low keeps temps seasonal this week with isolated thunderstorms for Southern Mono County through Monday.....A warm up is expected for the first week of August .....](https://mammothweather.com/2020/07/26/weak-upper-level-low-keeps-temps-seasonal-this-week-with-isolated-thunderstorms-for-southern-mono-county-through-monday-a-warm-up-is-expected-for-the-first-week-of-august/) - The weather pattern along the west coast thus far this Summer, affecting Mono County has resulted in drier, more temperate weather. Southern Mono County has had fewer heat spells as compared to many summers and fewer thunderstorm days in Mammoth. Early in the summer there was an enhanced zephyr, as the Pacific NW trof was
- [Warm Sierra Weather to continue with slightly warmer than normal temps....Upper divergence Mid Week to begin Summertime Thunderstorms Tomorrow Wednesday and Thursday.....However the long awaited Summertime Monsoon will begin during the second half of next week...](https://mammothweather.com/2020/07/14/warm-sierra-weather-to-continue-with-slightly-warmer-than-normal-temps-upper-divergence-to-begin-summertime-thunderstorms-wednesday-and-thursday-however-the-long-awaited-summertime-monsoon-will/) - Our Summer weather thus far has been warm and dry with stronger afternoon Zephyr. This is about to change as a weak upper low has developed west of the Bay Area this evening. This feature will move further south with time putting the high country of Mono County under at least weak upper divergence. Our
- [Beautiful sierra weather is in store for the high country the next 7 to 10 days.....After Mid Month, the heat builds along with thunderstorms possibilities...](https://mammothweather.com/2020/07/02/beautiful-sierra-weather-is-in-store-for-the-high-country-the-next-7-to-10-days-by-mid-month-the-heat-builds-along-with-thunderstorms/) - Dry Comfortable weather with breezy afternoons are expected through the 12th of July with Summer heat and the arrival of the Summer Monsoon not expected until after the 15th of July. Weather Summery: A Trof of low pressure aloft over the Pacific Northwest will remain stationary for the next 8 to 14 days. This will
- [Last week of Spring begins with breezy conditions Monday through Tuesday and ends on a calm note with above normal temperatures next weekend as Smooth Spring hand-off expected to Summer......](https://mammothweather.com/2020/06/15/last-week-of-spring-begins-with-breezy-conditions-monday-through-tuesday-and-ends-on-a-calm-note-with-above-normal-temperatures-next-weekend-as-smooth-spring-hand-off-of-the-baton-expected-to-summer/) - Fathers Day: It's the first full day of Summer and it feels like it. Temps today should hit 80 degrees in Mammoth. At 12:00PM a light zephyr had begun. For those that have never experienced Mammoth in the Summer, I can say without reservation, that Summers in Mammoth are nothing short of heaven on
- [Weather pattern of variablity likley to continue another week...It will be cooler this weekend after a Troughs Passage...Then warming Sunday into following mid week....Another trough is likely the 2nd half of next week....](https://mammothweather.com/2020/06/10/weather-pattern-of-variablity-likley-to-continue-another-week-it-will-be-cooler-this-weekend-then-warming-sunday-into-following-mid-week-another-trough-is-likely-the-2nd-half-of-next-week/) - Seasonal temperatures are expected the next two days as short wave ridging build over the area. Another late season trough descends from the GOA Friday bringing gusty winds and cooler temps Friday through Saturday. Winds may reach advisory level Friday afternoon and night. Temperatures will cool some 10 to 15 degrees between Thursday and Saturday.
- [The weather will be variable this week....Chance of Showers and Thunderstorms.....Then Breezy and Cooler over the weekend....Even a slight chance of some snow showers late Saturday or Sunday AM....](https://mammothweather.com/2020/06/01/the-weather-will-be-variable-this-week-chance-of-showers-and-thunderstorms-then-breezy-and-cooler-over-the-weekend-even-a-slight-chance-of-some-snowfall-by-early-next-week/) - Thursday: Weather update shows a nice day today with minimal daytime convection in the late afternoon... Highs in the mid to upper 70s...Then cloudy weather developing Friday with showers and thunderstorms possible in the afternoon and evening hours....Upper jet and its front left exit region will focus lift over the Owens Valley Friday afternoon. Thereafter,
- [Record Heat for Eastern California developing the next few days with summer like late afternoon thunder expected....Cooler breezy weather to return by weeks end....More breezy weather next week with seasonal temps....](https://mammothweather.com/2020/05/25/record-heat-for-eastern-california-developing-the-next-few-days-with-summer-like-late-afternoon-thunder-expected-cooler-breezy-weather-to-return-by-weeks-end-more-breezy-weather-next-week-with-s/) - Tuesday May 26th Update This Morning's GFS shows the Cut-Off Low shifting further east before turning northward Thursday. Should this new track of the Cut Off verify, this puts the favored NE quad of the Upper Cut Off far enough south over CA to bring upper divergence over the our portion of the sierra Friday
- [Cold Upper Low off the Northern CA Coast Monday AM will move south...then inland over the Bay Area Monday night.....Cold Pool will shift east later today bringing light snowfall to the Town of Mammoth with Moderate snow to Mammoth Mt today and tonight......Cold Unstable Air Tuesday will keep snow showers going Tuesday....A glance at Memorial Day weekend....Weather fair and breezy 1st part then warmer Sunday and Monday......](https://mammothweather.com/2020/05/18/cold-upper-low-off-the-northern-ca-coast-monday-am-will-move-south-then-inland-over-the-bay-area-monday-night-cold-pool-will-shift-east-later-today-bring-light-snowfall-to-the-town-of-mammoth-wi/) - This mornings weather pattern is highlighted by a long wave trof just off the west coast the first part of this week. The current system is highlighted by a significant upper low and cold pool off the Northern CA coast with 500MB heights of 545 centered just west of the OR/CA border at 12Z Monday.
- [First Week Of May will be Warmer than Normal.....Extended Outlook (6 to 10 day) shows warm tranquil weather with out any significant wind or precipitation....](https://mammothweather.com/2020/05/04/first-week-of-may-will-be-warmer-than-normal-extended-outlook-6-to-10-day-shows-warm-tranquil-weather-with-out-any-significant-wind-or-precipitation/) - It is almost like mother nature flipped a switch that took us from the cold season to the warm... There was some anomalous weather Sunday as the front right portion of the upper jet over Northern CA brought strong down sloping, compressional type heating to the Owens Valley. As a result, Bishop was some 30
- [April Ends with Record Heat followed by Seasonal Temperatures by Weeks End....Cooler weather will be short lived with a rapid warm up by Mid Week.....](https://mammothweather.com/2020/04/27/april-ends-with-record-heat-followed-by-seasonal-temperatures-by-weeks-end/) - It appears that April will end with a record breaking heat wave for the Sierra. A flat ridge of high pressure aloft gets pumped up over the Golden State with today's 12z GFS 500mb heights progging a peak of 588 dm by 06z Wednesday, while 500mb-1000mb Thicknesses peak at 572DM Tuesday night and 571DM again
- [Wrapping up April Precipitation the next Few Days then serious warm-up 2nd half of the next week with 60s possible by weeks end 26th....](https://mammothweather.com/2020/04/18/wrapping-up-april-precipitation-the-next-few-days-then-serious-warm-up-2nd-half-of-the-next-week-with-60s-possible-by-weeks-end-25th/) - Another 3 to 5 inches of snow fell on Mammoth Mt the past 36 hours. A few showers are still possible today Saturday as the small storm exits to the east....Sunday looks fair with highs near 50. The next and last upstream system weakens as the upper blocking ridge in the GOA shifts east to
- [Variable Spring Weather to continue another 6 to 10 days with Sun and Snow.....Tomorrow Wednesday is one of nicest days ahead....](https://mammothweather.com/2020/04/14/variable-spring-weather-to-continue-another-6-to-10-days-with-sun-and-snow-tomorrow-wednesday-is-one-of-nicest-days-ahead/) - A highly amplified upper ridge continues full latitude into the Gulf of AK this week. Upper flow today and tomorrow is right out of the north. Tomorrow, some of that ridge will spread higher heights into California for about 10F degrees of warming while a small upper low comes through the ridge and down the
- [Active Weather pattern to return this weekend with moderate to heavy snow possible Sunday and Monday.....Improving Weather by Mid Week..Then AR Lurking in GFS around the 12th while The EC is dry.....](https://mammothweather.com/2020/04/01/active-weather-patter-to-return-this-weekend-with-moderate-to-heavy-snow-possible-sunday-and-monday-improving-weather-by-mid-week-then-ar-lurking-in-gfs-around-the-12th-while-the-ec-is-dry/) - 10:10AM Monday Mammoth Pass had 24 hour amounts of 3.64 inches. At 10:1 that's about 3 feet. Mammoth Mt Should have between 3 and 3.5 feet total for the second storm. Town of Mammoth averaged 21 inches Storm now will favor Southern Sierra, Owens valley and Southern CA. At 500MB the Upper low
- [Last in the Series of weather system to bring light snowfall Saturday into Sunday evening......Fair to Partly cloudy next week with warmer temperatures....](https://mammothweather.com/2020/03/27/last-in-the-series-of-weather-system-to-bring-light-snowfall-saturday-into-sunday-evening-fair-to-partly-cloudy-next-week-with-warmer-temperatures/) - It's ironic that the best Skiing and Boarding conditions since last December have occurred this month and the Mountain is closed......No thanks to COVID 19. The parttern that dumped between 16 and 19 inches on Mammoth Mt this past week and another possibly 1 to 3 inches this weekend is winding down A March Miracle?
- [Two more weather Systems to affect our area through Mid Week....Light to Moderate snowfall possible.....EPO to go positive in April....](https://mammothweather.com/2020/03/21/two-more-weather-systems-to-affect-our-area-through-mid-week-light-to-moderate-snowfall-possible/) - 3-23-2020 6:45PM Although Mammoth Mt is closed, they reported 4 to 6 inches of snow from the Sunday afternoon/night system. The last in the series will be moving in Tuesday, bringing more wind and snowfall into early Thursday AM This would be considered a low end moderate storm. The main upper low is more
- [Cold Upper Low to slowly head south the next few days....Eventually bringing Mod to Hvy Snowfall to the Eastern Sierra Sunday/Ngt.....After a small break by Thursday and Friday.... Another system affects the west coast by weeks end.....A series of storms look to bring more snowfall to the Sierra through months end....](https://mammothweather.com/2020/03/14/cold-upper-low-to-slowly-head-south-the-next-few-days-eventually-bringing-mod-to-hvy-snowfall-to-the-eastern-sierra-sunday-ngt-after-a-small-break-by-thursday-and-friday-another-system-affe/) - 5:30pm Sunday This storm is certainty the creeper. Although yesterdays forecast below indicated that the front would be near Mammoth at 00z Monday. (Sunday at 5:00PM), the updated forecast shows it will not come through until about 11:00AM Monday. So do not expect snowfall to become heavy until well after midnight tonight...Heaviest snowfall will probably
- [Mammoth Mt adds 2 inches to its base with another light snowfall expected for Monday - Wednesday...Main focus of next storm targets Southern CA, with best precipitation expectations......Change in Pattern comes later next week as short wave energy returns, closer to the west coast with moderate snowfall potential and colder than normal temperatures....](https://mammothweather.com/2020/03/08/mammoth-mt-adds-2-inches-to-its-base-with-another-light-snowfall-expected-for-tuesday-and-wednesday-main-focus-of-next-storm-targets-southern-ca-with-best-precipitation-expectations-change-in/) - 3-10-20 9:00AM Just to be brief....Although areas of Heavy Rain are expected to develop in the southern portions of the Owens Valley late today and this evening, Expectations is that this continues to be a light snowfall producing system for the Mono County High Country, with 1 to 4 inches expected above 7000 to 8000
- [Cooler weather expected by the weekend with some light snowfall possible......Series of Closed Lows to slowly take aim on California next week.....Periods of moderate precipitation possible....](https://mammothweather.com/2020/03/04/cooler-weather-expected-by-the-weekend-with-some-light-snowfall-possible-series-of-closed-lows-to-slowly-take-aim-on-california-next-week-periods-of-moderate-precipitation-possible/) - 3-6-20 TGIF Focus now will be the big rain maker getting set up for Southern CA. There is a rich source tropical plume just north of the dateline associated with the low frequency base state that has connection east, then North Eastward to Northern Baja and Southern CA. next week. A short wave, in back
- [Forecast models looking a bit better with the next weather system keeping the Trof open moving South....Light to moderate snowfall amounts looking more likely now....](https://mammothweather.com/2020/02/26/forecast-models-looking-a-bit-better-with-the-next-weather-system-keeping-the-trof-open-moving-south-light-to-moderate-snowfall-amounts-looking-more-likely-now/) - The Euro model has been pretty consistent in keeping the next weather system, open as it move south, down the CA coast, at least through Central CA. The American models have been leaning that same way over the past 24 hours. So as weather folks say, the trend is our friend.... Quantitative precipitation forecasts have
- [Closed low now formed will drop SSE today then move into Southern CA Saturday.....Light snowfall expected....Mainly Saturday for Mono County.....This will be followed by another dry week.....](https://mammothweather.com/2020/02/20/closed-low-now-formed-will-drop-sse-today-then-move-into-southern-ca-saturday-light-snowfall-expected-mainly-saturday-for-mono-county-this-will-be-followed-by-another-dry-week/) - February 25th Of Public interest; The driest winters with less than 225 inches 2007 222 inches 1990 214 1977 197.5 inches 1987 195.8 2015 176 1977 94 Winter of 2020 so far 138 with March, April and May to go. What's different between most of these winters and the winter of 2020? We have
- [Another Cool Dry week on tap with the possibility of some light snow or snow showers Friday afternoon and Sunday Night....Major Pattern Change Expected for North America toward the end of Week Two...](https://mammothweather.com/2020/02/18/another-cool-dry-week-on-tap-with-the-possibility-of-some-light-snow-or-show-showers-friday-afternoon-and-sunday-and-sunday-night/) - Wednesday the 19th of Feb It is a beautiful Morning in the high country with little if any wind top to bottom. Today's temps will be in the mid 40s in town and in the 30s on Mammoth Mt. Very little wind is expected....Nights in the 20s. This Mornings 500mb/250MB maps show a SW /NE
- [Northerly Flow Aloft will continue this week.....Although next Sunday's System the end of the week is digging a bit more to the West...Euro still keeps enough of the system overland for it to be pretty dry....](https://mammothweather.com/2020/02/10/northerly-flow-aloft-will-continue-this-week-although-next-sundays-system-the-end-of-the-week-is-digging-a-bit-more-to-the-west-euro-still-keeps-enough-of-the-system-overland-for-it-to-be-pret/) - February 14th....Happy Valentine day!! I am not going to post anymore this week so have a nice holiday..... Some thoughts...... "March Madness" is not only a term used in college basketball. It is a term that I use in climatology for the month of March. There is a reason why March comes in like a
- [WX pattern once again to revert to one of January.....Cold Dry and Breezy......Some light snow possible next week](https://mammothweather.com/2020/02/06/wx-pattern-once-again-to-revert-to-one-of-january-cold-dry-and-breezy-some-light-snow-possible-next-week/) - No surprises today as another in a series of northerly sliders heads for CA Saturday night. It seems that the pattern of January continues with more cold, Dry, Breezy weather ahead. There is a slight change in the trajectory. At least early on with the systems dropping south into the Great Basin before backing west
- [Exceptionally strong cold front will sweep south through Mono County Sunday afternoon.....And Owens Valley Sunday Night.....Exceptionally Strong Winds possible for the Owens Valley and Western Nevada Sunday night!](https://mammothweather.com/2020/02/01/exceptionally-strong-cold-front-will-sweep-south-through-mono-county-sunday-afternoon-and-owens-valley-sunday-night-exceptionally-strong-winds-possible-for-the-owens-valley-and-western-nevada/) - Sunday AM 9:15 Long Range Update: Both European and GFS are showing -Phase EPO with Deepening Kona low-negative height anomaly developing toward mid month while cold negative height anomaly develops off the coast of the pacific NW. stay tuned........:-) _____________________________________________________________________________________________ 40 degree drop in temperatures are expected over the next 48/hours....we will go from a
- [Gradual warming trend through Saturday....Then cloudy breezy cooler Sunday.....Ground Hog (Mammoth Marmot) May not see shadow Sunday AM......Cold Northwest slider to bring wind...Cold and light snow Sunday night and Monday......](https://mammothweather.com/2020/01/30/gradual-warming-trend-through-saturday-then-cloudy-breezy-cooler-sunday-ground-hog-mammoth-marmot-may-not-see-shadow-sunday-am-cold-nort-west-slider-to-bring-wind-cold-and-light-snow-s/) - It’s been the winter of the Northwest Slider so far. As we know, these are primarily cold, windy systems that descend out of the northern latitudes, bring the Pacific Northwest rain and snow, while they move inland over Northern CA, and dry out. There is nothing that can be done about them. They will bring
- [Unsettled Weather to continue through Tuesday...Sunday Storm to freshen Up the Snow-pack with up to 4+ inches of Powder on the Upper Mountain....Lighter amounts in town.....It looks likely that the Ground Hog will see his Shadow on Mammoth Mt on Super Sunday......](https://mammothweather.com/2020/01/24/unsettled-weather-to-continue-through-tuesday-sunday-storm-to-freshen-up-the-snow-pack-with-up-to-4-inches-of-powder-on-the-upper-mountain-lighter-amounts-in-town-it-looks-likely-the-the-gro/) - 8:00pm. Monday Fellow Dweebs, if you looking for a big storm anytime soon, it is very unlikely. However, Mammoth Mt is doing some amazing grooming every night turning up the surface of the snow so that skiing and boarding is excellent each day. After all, 4 to 7.5 feet of snow is very good.
- [High clouds continue to flood into Central California creating more grey days......Forecast Models have now backed off favorable tropical forcing for CA......next significant system the end of this week.....](https://mammothweather.com/2020/01/20/high-clouds-continue-to-flood-into-central-california-creating-more-grey-days-forecast-models-have-now-backed-off-favorable-tropical-forcing-for-ca-next-significant-system-the-end-of-this-we/) - ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ January 21st Update: No real changes today with the wave coming through tonight and again Sunday. I had a look the 500mb Vort field for the 26th. The consensus is that the short wave is going to split over Central CA, including the vorticity field Sunday. This makes for a challenging outlook precip wise,
- [Unsettled Weather to continue through Tuesday with the storm track mainly to our north.....Expect light Snow Sunday with Snow Showers possible Tuesday.....Warm up and Dry Thursday through Sunday Next Week.....](https://mammothweather.com/2020/01/24/unsettled-weather-to-continue-through-tuesday-with-the-storm-track-mainly-to-our-north-expect-light-snow-sunday-with-snow-showers-possible-tuesday-warm-up-and-dry-thursday-through-sunday-next/) - This is just a quick update on the Sunday AM storm. CRFC came out slightly wetter this morning for the Sunday system for Yosemite than yesterday. Snowfall still in the light category. (1 to 6 inches.) My Estimate is 2 to 4 inches on Mammoth Mt with 1 to 2 inches in town by Sunday
- [Moderate storm dumps 7 to 10 inches on Mammoth Mt....Next weather system warmer for Tuesday, with track mostly to the north....Still tracking the MJO](https://mammothweather.com/2020/01/17/moderate-storm-dumps-7-to-10-inches-on-mammoth-my-next-weather-system-warmer-for-tuesday-with-track-still-i-question-still-tracking-the-mjo/) - 1-18-2020) 3:00PM FLASH!! New 6 to 10 day CPC outlook shows -EPO!! Westerlies undercutting the Western AK Block. This is the First Model Alert of a Possible wet pattern developing for the central west coast in the 6 to 10 day outlook!! (Possible AR) More Later..... ___________________________________________________________________________________________________________________________________________________________________________________________________________ Our strong short wave Trof did
- [Another Cold NW  Slider on the way for late tonight with strong winds into Tuesday AM....A  winter storm expected for Thursday then dry over the weekend........](https://mammothweather.com/2020/01/13/another-cold-nw-slider-on-the-way-for-late-tonight-with-strong-winds-into-tuesday-am-a-winter-storm-expected-for-thursday-then-dry-over-the-weekend/) - 5:00PM Update 1-14-2020 The CPC report was very encouraging for the MJO moving into phase 7/8. I keep blogging about this because this is the area associated with blocking over Alaska. This is critical for the shunting of the EAJ into the west coast. (AR) If this does not happen it may be dry for
- [Series of NW sliders to Keep the Chill on in the High country with colder weather, windy Show Showery weather ahead.....The Pacific finally opens up for a good Storm Late Wednesday into Friday.......](https://mammothweather.com/2020/01/10/series-of-nw-sliders-to-keep-the-chill-on-in-the-high-country-with-colder-weather-windy-show-showery-weather-ahead-the-pacific-finally-opens-up-for-a-good-storm-late-wednesday-into-friday/) - THE PACIFIC FINALLY OPENS UP!! Its been pretty scary for a longer range forecaster to go out into the week two period with a meaningful storm that may deliver well over a foot of snow during the 2nd half of next week. As touted in past discussion, the MJO is strong now in phase
- [Series of NW sliders to bring cold to the high country Wednesday into next week....Storms will arrive about every other day.....Gusty winds over the upper elevations.......Only light accumulations expected with each system......Will the MJO put the Kabash on our off shore storm later next week....](https://mammothweather.com/2020/01/07/series-of-nw-sliders-to-bring-cold-to-the-high-country-wednesday-into-next-week-storms-will-arrive-about-every-other-day-gusty-winds-over-the-upper-elevations-only-light-accumulations-exp/) - 4:00PM Tuesday Read the new CPC discussion this morning....They are still bullish on the storm the 2nd half of next week. The CPC new 6 to 10 and 8 to 14 day outlooks are wet for the Central and Northern Sierra in today's update. Obviously they like the GFS and are going with it. Still
- [Long Wave Trof to Deepen over the Great Basin this week and into the Weekend....Models are toying with the idea of retrogression week 2 to set up possible snow storm Friday the 18th....](https://mammothweather.com/2020/01/05/long-wave-trof-to-deepen-over-the-great-basin-this-week-and-into-the-weekend-models-are-toying-with-the-idea-of-retrogression-week-2-to-set-up-possible-snow-storm-wednesday-the-15th/) - Monday the 6th of Jan 3:45PM Just looked at the ensembles of the GFS and EC. Looking better for significant snow storm but pushed by to the 18th... I still do not like that the MJO is not supporting this Pattern Change. Not sure why? More Later. SUNDAY PM 12-05-2020 Had a
- [Positive Phase Indian Ocean Dipole weakening now.....Positive Phase AO keeping Arctic Air Bottled up but not for much longer!!!! Retrogression of the Eastern Pacific High to begin Mid Month......](https://mammothweather.com/2020/01/03/positive-phase-indian-ocean-dipole-weakening-now-positive-phase-ao-keeping-arctic-air-bottled-up-but-not-for-much-longer-retrogression-of-the-eastern-pacific-high-to-begin-mid-month/) - It's a great time to be an Amateur Weatherman. All sorts of fun tools available. I have some great friends, now retired that have taught me much over the years...... Today I thought I would include a bit more in my discussion as there is a lot going on over the Hemisphere. Earlier in the
- [No Relief in our dry spell with below normal precipitation expected into Early November...... Chilly Western Canadian Air to pay a visit early next week.....](https://mammothweather.com/2019/10/22/no-relief-in-our-dry-spell-with-below-normal-precipitation-expected-into-early-november-chilly-western-canadian-air-to-pay-a-visit-early-next-week/) - 10-25-2019 Just a quick update; Our warm up will peak today in the high country. Expect highs mid to upper 60s today... Then a strong dry cold front will sweep through Mammoth with breezy weather Saturday night followed by a temperatures drop of greater than 20 degrees Sunday over Saturday. Highs inn the upper 30s
- [Happy New Year from the Dweebs!!!....End of Year Forecast and Long Range Ahead!!.................................](https://mammothweather.com/2019/12/31/happy-new-year-from-the-dweebs-end-of-year-forecast-and-long-range-ahead/) - Short Term, Most the of the short term is about wind and milder temperatures.... The Dweebs believe that the Arctic Oscillation in its positive phase will tend to keep most Arctic Air bottled up well to our north. As a result, our wet storms of late November and cold storms of mid to late December
- [Weak.....Fast moving Closed Low to bring light amounts of Snowfall to the Eastern Sierra this afternoon into Monday....Low is tracking further off shore which will impact snow fall amounts......Arctic Air retreats to the north as AO goes increasing positive....This will be the last storm of 2019....First week of January looks dry......](https://mammothweather.com/2019/12/29/weak-fast-moving-closed-low-to-bring-light-amounts-of-snowfall-to-the-eastern-sierra-this-afternoon-into-monday-low-is-tracking-further-off-shore-which-will-impact-snow-fall-amounts-arctic/) - 12/30 7:50AM Partly Cloudy today with a chance of light snow showers. Very light if any accumulations today.... Mammoth Mt reports 1 to 2 inches of new snow over night.. Our weather system was just too weak and too of shore to do us any good... Expecting a dry week ahead....With clouds
- [Cold Weather to persist through Christmas and the day after with Snow showers....Milder Temps over the weekend...Then some more snow shower expected Monday the 30th...No Major Storminess through the New Years day.....](https://mammothweather.com/2019/12/24/cold-weather-to-persist-through-christmas-and-the-day-after-with-snow-showers-milder-temps-over-the-weekend-then-some-more-snow-shower-expected-monday-the-30th-no-major-storminess-through-the-n/) - 12-25-2019 Update 9:45PM A cold upper low was located west of Paso Robles at this time and will slowly making its way south down the coast. The Eastern Sierra near Mammoth Lakes will experience some light snowfall tonight into the morning hours. Amounts will be light., 1 to 3 inches. However, the Owens Valley is
- [Unimpressive front falling apart today and this evening......Upslope snowfall Monday coming to the rescue....](https://mammothweather.com/2019/12/22/unimpressive-front-falling-apart-today-and-this-evening-upslope-snowfall-monday-coming-to-the-rescue/) - Noon Sunday: So far the Front has been very unimpressive over Southern Mono County. However, to the north...Even as far south as June Lake or Tioga Pass may have been better. The Front is dis -jointed...and will fall apart this afternoon and evening. The Dweebs are not expecting more than between 2 to 6 inches
- [Mild Weather with seasonal temperatures to continue through Saturday....Then cooler weather arriving with light snowfall mid to late Sunday morning through Monday with cold unsettled weather through much of next week...](https://mammothweather.com/2019/12/19/mild-weather-with-seasonal-temperatures-to-continue-through-saturday-then-cooler-weather-arriving-with-light-snowfall-mid-to-late-sunday-morning-through-monday-with-cold-unsettled-weather-through-m/) - Friday 8:00 AM Update The only change in the forecast from below is that the Freezing level is now forecasted to begin lower in the Mammoth Area. At Yosemite, 8,400 feet at 4:00 AM but drops to 6100 by 10:00 am. The snow level is typically 1000 to 1500 feet lower than the freezing
- [Colder temperatures will begin the new week followed by some Snow Showers Wednesday....Next Significant storm expected Late Saturday night....](https://mammothweather.com/2019/12/15/colder-temperatures-will-begin-the-new-week-followed-by-some-snow-showers-wednesday-next-significant-storm-expected-late-saturday-night/) - UPDATE THIS AFTERNOON>>>>>>>>>>>>> _______________________________________________________________________________________________________________ 12-17-2019 1:35pm Update New 12z Euro today shows less emphasis on the Sunday storm now as the upper flow becomes too southerly to do much good. It is the secondary short wave (Tuesday) on its back side that is closer to the coast with the upper flow that is more "natural"
- [Moist belt of westerlies to push into high country Thursday night..initially rain then snow to follow...](https://mammothweather.com/2019/12/11/moist-belt-of-westerlies-to-push-into-high-country-thursday-night-initially-rain-then-snow-to-follow/) - A moist belt of westerlies will bring light rain and high elevation snow to the high country Thursday night and Friday, followed by colder weather over the weekend. The snow level will rise above 9500 feet Friday. However, as the belt moves south, Colder air with lowering snow levels will follow over the weekend. Overall,
- [Dry Weather to hold through mid week then more precipitation expected by the weekend of the 14th.....AR Moisture lurking to the west later this week....](https://mammothweather.com/2019/12/08/dry-weather-to-hold-through-mid-week-then-more-precipitation-expected-by-the-weekend-of-the-14th-ar-moisture-lurking-to-the-west-later-next-week/) - The weekend storm ended up on the lower end of the Dweebs snowfall estimates. The Mammoth area received on the average between 1 and 2 feet. An active jet stream remains out over the pacific and our pattern is likely to become wet by Friday as a weak AR approaches California this Friday. Snow levels
- [Winter Storm Warning has been hoisted for the Eastern Sierra For Friday Night through Sunday Noon.....1 to 2 feet expected for the Town and 2 to 3 feet for Mammoth Mt by Sunday Noon.....The Following week looks Dry......](https://mammothweather.com/2019/12/05/winter-storm-warning-has-been-hoisted-for-the-eastern-sierra-for-friday-night-through-sunday-noon-1-to-2-feet-expected-for-the-town-and-2-to-3-feet-for-mammoth-mt-by-sunday-noon-the-following/) - 4:00PM Saturday the 7th... Its been a wet day in the high country. Mammoth Mountain has picked up about 6 inches at the main lodge at 4:00PM with just slop in town. It is possibly that the upper Mt may have received about 9 inches as an est. Tonight is the night for snow as
- [Mammoth Mountain Reports 6 feet of snow at Main Lodge kicking off the 2019/2020 ski season.....Off shore warmer-wetter system to bring light amounts of snow through Wednesday with higher snow levels.......Next colder wetter system moving in later Friday with heavy snowfall Friday night through Saturday.....Then fairly long break....](https://mammothweather.com/2019/12/02/mammoth-mountain-reports-6-feet-of-snow-at-main-lodge-kicking-off-the-2019-2020-ski-season-off-shore-warmer-wetter-system-to-bring-light-amounts-of-snow-through-wednesday-with-higher-snow-levels/) - 3:50PM Monday the 2nd... Snowfall is riding to our north.....Do not expect much over night or tomorrow. _________________________________________________________________________________________________ Temperatures have been pretty remarkable the past several days with strong inversions in the deserts. Last Sunday at noon it was 29 degrees at the main lodge, 23 in the Town while in bishop, 26 degrees....
- [All Systems Go For the First Major Storm for the Eastern Sierra....This will be a one two punch as a warmer wetter system arrives Saturday over Cold Air in place....](https://mammothweather.com/2019/11/26/all-systems-go-for-the-first-major-storm-for-the-eastern-sierra-this-will-be-a-one-two-punch-as-a-warmer-wetter-system-arrives-saturday-over-cold-air-in-place/) - Winter Storm Warnings are hoisted for the Eastern Sierra beginning at 7:00PM Tonight through 7:00PM Thursday night. For the Owens Valley, the Warning begins at 5:00PM this afternoon through Friday Morning at 5:00AM The highlights with the Sierra part of the storm will be Blizzard conditions tonight and the potential for temporary road closures during
- [Winter Storm Warnings Have been hoisted by the NWS beginning 7:00PM Tuesday through 7:00PM Thursday.....Winter Storm will move out Friday.....](https://mammothweather.com/2019/11/24/winter-storm-warnings-have-been-hoisted-by-the-nws-beginning-700pm-tuesday-through-700pm-thursday-winter-storm-will-move-out-friday/) - 11:45pm Sunday Quick look at the 00z Mon Euro shows a slight jog of the upper low toward the coast. It also stalls it out near the Bay Area Thursday morning into the early afternoon. A little better..... ___________________________________________________________________________________ Latest Guidance shows a powerful winter storm headed for the Sierra Tuesday night and should continue
- [Chilly weather to give way to a milder weekend.....Then Ready-Set-Go for Snow!!](https://mammothweather.com/2019/11/21/chilly-weather-to-give-way-to-a-milder-weekend-then-ready-set-go-for-snow/) - 11-24 I will be posting this afternoon... just a quick note to say that the storm looks very good. Although it may lift out more like Friday instead of Saturday.... It still looks like at least 1 to 2 feet and possibly more on the mountain by the next weekend.
- [In a flash...the Warmth of Fall is Gone....New weather Types Await the Eastern Sierra........](https://mammothweather.com/2019/11/20/in-a-flash-the-warmth-of-fall-is-gone-new-weather-types-await-the-eastern-sierra/) - It was just two days ago, our highs were in the upper 60 and today upper 20s.. That's pretty remarkable and difference in 40 degrees of cooling over two days.... Our closed low that brought us rain and snow showers to town yesterday afternoon has moved inland and located over Kern County. it will meander
- [Impressive heat wave to end today with 30 to 35 degrees of cooling expected by Wednesday...light snow in forecast for Tuesday night and Wednesday with fair dry weekend...,](https://mammothweather.com/2019/11/18/impressive-heat-wave-to-end-today-with-some-35-degrees-of-cooling-is-expected-by-wednesday-light-snow-in-forecast-for-tuesday-night-and-wednesday-with-fair-dry-weekend/) - 3:45PM Tuesday the 19th There was a very encouraging update for the CPC this Morning. They chat about the extreme IOD out over the Indian Ocean. That is bringing flooding to parts of Africa and drought to parts of Australia. They now expect a response to the mid latitudes which is surprising! This
- [Fair mild weather to last through Monday with the last of the 60 degree highs in Mammoth for this season and next.....Enjoy those last hikes in the Back Country Sunday and Monday...Major change in the pattern coming mid-week with cold and snowshowers......Tropical moisture may get involved with the system from Tropical storm Raymond Mid week.....Will update later.......](https://mammothweather.com/2019/11/15/fair-mild-weather-to-last-through-monday-with-the-last-of-the-mammoth-60-degree-highs-for-this-season-and-next-enjoy-those-last-hikes-in-the-back-country-sunday-and-monday-major-change-in-the-pa/) - Enjoy the last few days of early fall like weather as more "winter like" weather is on the way by Mid Week. A wave from the westerlies pinches off from the Gulf of AK and spins up off the Central Ca Coast and stalls out over Southern CA. This brings the good possibility of upslope
- [Cooler Days to begin Wednesday then through Friday....Models showing some interesting changes next week.....](https://mammothweather.com/2019/11/12/cooler-days-to-begin-wednesday-then-through-friday-models-showing-some-interesting-changes-next-week/) - 2:40PM Thursday The Trend is my friend...... Just a quick note to say that the new 18Z GFS brings in the low a bit more north with the 18Z run, so it may be converging more toward the Euro solution. This would move the deformation line northward in the Sierra, (Central Sierra) increasing the
- [Another warm few days ahead then cooler weather to follow beginning mid week into Saturday AM....Warmer weather to return by Sunday.....Time for Weather Extras.....](https://mammothweather.com/2019/11/11/another-warm-few-days-ahead-then-cooler-west-to-follow-beginning-mid-week-into-saturday-am-warmer-west-to-return-by-sunday-time-for-weather-extras/) - 2:42 PM November the 11th...Longer Range Outlook. The European model's version of the MJO is still not expecting a strong showing in Phase 8 (Western Hemisphere and Africa) and is very weak or non existent in the ensembles in phase 1 (Africa), which is the key for Central CA in the MJO precip
- [Blocking Pattern to continues through Mid Week then weakens a bit toward next weekend.....However, East Asian Jet Stream remains retracted from the west coast......](https://mammothweather.com/2019/11/09/blocking-pattern-to-continues-through-mid-week-then-weakens-a-bit-toward-next-weekend-however-east-asian-jet-stream-remains-retracted-from-the-west-coast/) - The weather sensibly over the next 3 to 4 days remains virtually unchanged. Thereafter, expect a gradual cool down beginning Wednesday through the following Friday with considerable high clouds over head and WSW breezes. This change comes about as the current portion for the large scale pattern affecting California weakens enough, allowing short wave action
- [Stable weather with above normal temperatures to continue this week as Large Scale Omega Block in the mean persists.......Expect the current Ridge Trough pattern to weaken a bit about mid month with some unsettled weather possible....](https://mammothweather.com/2019/11/05/stable-weather-with-above-normal-temperatures-to-continue-this-week-as-large-scale-omega-block-in-the-mean-persists-expect-the-current-ridge-trough-pattern-to-weaken-a-bit-about-mid-month-with-s/) - NOVEMBER 6TH, 7:00AM No changes in the short or medium range Some changes are showing up in the GFS this morning around the 15th to the 21st. The GFS tries to bring in some short wave energy to the west coast. The Dweebs have indicated for sometime that the pattern would de-amplify around then,
- [Near Record Cold Over the Weekend supplying wind energy for the Southland today......Next shot of Great Basin energy on the way......](https://mammothweather.com/2019/10/28/near-record-cold-over-the-weekend-supplying-wind-energy-for-the-southland-today-next-shot-of-great-basin-energy-on-the-way/) - November 1st; The weather pattern continues dry for the eastern sierra. Stronger inversions are developing now and so temperatures aloft are not as cold. There are two global models that I usually compare most of the time. The ECMWF (euro) The GFS (american) On occasion, the JMAN Japanese (ensemble) and Canadian. (GEM) All are dryer
- [After a Brief Warm up...Pattern to bring cooler breezy weather into our region Thursday through Saturday....The Possibility of PSPS are once again on the table.....California Heat Wave looming later next week.....](https://mammothweather.com/2019/10/16/after-a-brief-warm-up-pattern-to-bring-cooler-breezy-weather-into-our-region-thursday-through-saturday-the-possibility-of-psps-are-once-again-on-the-table/) - Wednesday Evening the 16th; Most of the global models have the MJO in Phase II with some now pushing the Phase III idea. Odds are, it going to get very warm in CA later next week.....Could be critical fire situation for Southern CA... Overall, its looking like a pretty slow start to the ski
- [Next Windy System Arriving Tuesday night....PSPS is again possible......Turning colder Mid Week.....No Precipitation expected](https://mammothweather.com/2019/10/07/next-windy-system-arriving-tuesday-night-psps-is-again-possible-turing-colder-mid-week-no-precipitation-expected/) - Another dry cold front will be approaching Mono County Late Tuesday with moderate winds again expected....Strongest Winds will be with the steepest gradient. The timing is between 5:00AM and 11:00AM Wednesday morning. The Planned Power Outage may occur, well before this time.... Otherwise, expect cooler weather Wednesday and Thursday in Mammoth Lakes with highs in
- [Warming trend this week with above normal temps this weekend......The forecast looks dry for the next week....](https://mammothweather.com/2019/10/02/warming-trend-this-week-with-above-normal-temps-this-weekend-the-forecast-looks-dry-for-the-next-week/) - After the Big Chill the past few days, Mammoth was climbing out of cold temperatures and warming up quickly. The Dweebs expect temperatures in the upper 60s this weekend! Today, the high temperature in Bishop Wednesday was 73 degrees and in Mammoth, 57 degrees. Lows this morning were 32 degrees and 24 degrees respectfully... The
- [After a Beautiful Start to Fall....Weather pattern to turn cold over the weekend with snow showers possible....weather to remain colder than normal much of next week.....](https://mammothweather.com/2019/09/25/after-a-beautiful-start-to-fall-weather-pattern-to-turn-cold-over-the-weekend-with-snow-showers-possible-weather-to-remain-colder-than-normal-much-of-next-week/) - High temperatures moved into the low 70s in Mammoth Wednesday and will remain in the low 70s for Thursday as well. However a strong cold front will invade the Eastern Sierra Saturday morning with much cooler temperatures, rain showers to begin with then snow showers possible developing later Saturday. Light snow showers may continue through
- [Cool Breezy weather for Monday with warmer weather mid week.....Global models trending drier for next weekend system....with cold showery weather more likely.....](https://mammothweather.com/2019/09/22/cool-breezy-weather-for-monday-with-warmer-weather-mid-week-global-models-trending-drier-for-next-weekend-system-with-cold-showery-weather-more-likely/) - 9/24/2019: Forecasting week two periods Forecasting week 2 periods can be tricky as we all know. We can all use the ensemble members as well as the various global models plus an extra tool called the MJO. When the Global models are all in agreement that a cold trof will deepen down the west coast,
- [Beautiful Weekend......Breezy Sunday PM...Then Fall to begin with brief heat wave Tuesday-Wednesday.....MJO Stalls in Phase one with Winter Like weather the following weekend....](https://mammothweather.com/2019/09/21/beautiful-weekend-breezy-sunday-pm-then-fall-to-begin-with-brief-heat-wave-tuesday-wednesday-mjo-stalls-in-phase-one-with-winter-like-weather-the-following-weekend/) - 9/21/2019 No changes in the forecast through Mid-Week. IE. Warming Through Sunday. A little cooler Monday and warming Tuesday Through Wednesday. However, with a strong Trof coming in Friday and antecedent warmth due to the anomalous warmth mid-week, a possible wind event is in the cards for either Thursday or Friday. Critical Fire Weather? Prospects
- [First dusting of the season!!  Chilly Day in Mammoth Thursday with highs in the upper 40s... Expect a warmer weekend then.....Look out for the MJO in Phase 1.](https://mammothweather.com/2019/09/19/first-dusting-of-the-season-chilly-day-in-mammoth-thursday-with-highs-in-the-upper-40s-expect-a-warmer-weekend-then-look-out-for-the-mjo-in-phase-1/) - Friday 9/20/2019 Warm Up still on track with highs in the upper 60s this weekend. Purrrfect for the Mammoth Ocktober Fest. Lows at night will be in the 30s so take the parka to be sure if venturing out tonight! The outlook beyond the weekend shows a dry NW slider affecting our area
- [It's the last week of Summer and the weather is turning unsettled....Expect cooler weather this week with periods of wind...Near freezing temps in the morning then a fair mild weekend....](https://mammothweather.com/2019/09/16/its-the-last-week-of-summer-and-the-weather-is-turning-unsettled-expect-cooler-weather-this-week-with-periods-of-wind-freezing-temps-in-the-morning-then-a-fair-mild-weekend/) - September 17th Mammoth was in the dark last night with Edison shutting the power off throughout many areas of the Eastern Sierra. With a significant amount of power lines above ground, in forested and brushy areas, the power company can no longer afford to take risks during critical fire weather periods. The planned power outage
- [Warmer than normal temperatures will give pause to a strong cold front Monday with gusty winds and cooler temperatures...A dusting of light snow on Mammoth Mountain is possible by Tuesday morning....It will be warmer Wednesday into the following weekend](https://mammothweather.com/2019/09/13/warmer-than-normal-temperatures-will-give-pause-to-a-strong-cold-front-monday-with-gusty-winds-and-cooler-temperatures-a-dusting-of-light-snow-on-mammoth-mountain-is-possible-by-tuesday-morning-i/) - Updating....
- [Afternoon Thunderstorms Rattle the Eastern Sierra through Thursday then drier weather into the weekend with a cooling trend....Say good by this week to the Four Corners High as Summer weather shifts into Fall....But Summer weather may return again by Mid-Month!](https://mammothweather.com/2019/09/04/afternoon-thunderstorms-rattle-the-eastern-sierra-through-thursday-then-drier-weather-into-the-weekend-with-a-cooling-trend-say-good-by-this-week-to-the-four-corners-high-as-summer-weather-shifts-i/) - What remains of the Summertime four corners high will dissipate over the next few days as late summer troughs from the Gulf of AK head to the west coast. The transitory short waves will bring cooler air to our region and even the Desert SW. This in turn breaks up the upper high in that
- [Late Summer Heat Wave to give to a few thunderstorms Wednesday then a little cooler over the holiday weekend.....A dry weekend is expected with above normal temperatures....](https://mammothweather.com/2019/08/27/late-summer-heat-wave-to-give-to-a-few-thunderstorms-wednesday-then-a-little-cooler-over-the-holiday-weekend-day-weekend-expected-with-above-normal-temperatures/) - Some light North East Flow developed early this morning bringing some light smoke from the Spring Fire into Mammoth. That pattern is not likely to occur Wednesday with an increase of westerly flow. Thunderstorm action should it occur, would be in the late morning for Mammoth, (Just a slight chance) as westerly afternoon winds push
- [Extended Models Suggest that the warmest temperatures of the summer may still lie ahead.....Some Seasonal wind possible by end of next week....](https://mammothweather.com/2019/08/17/extended-models-suggest-that-the-warmest-temperatures-of-the-summer-may-still-lie-ahead-some-seasonal-wind-possible-by-end-of-next-week/) - Some of the finest weather in the eastern sierra in years, continues this weekend with daytime highs in the mid 70s and lows at the night in the 50s. Afternoon zephyr winds have been typical, in the 10 to 20 MPH range, with late afternoon breezes up to 25 MPH at times today Saturday, and
- [A rather cool weekend shaping up as off shore Trofing pushes east through California....A little frost possible in the wind protected valleys, Sunday AM...Warmer early next week ....](https://mammothweather.com/2019/08/09/a-rather-cool-weekend-shaping-up-as-off-shore-trofing-pushes-east-through-california-a-little-frost-possible-in-the-wind-protected-valleys-sunday-am-warmer-early-next-week/) - This Summer has shown to be quite the trough'y one with very low thunderstorm days. Highs in Mammoth have run a good 5 to 6 degrees below normal this Summer. In fact our average warmest day in July is 88 degrees, while 80 was the warmest. We are settling in on a cool breezy weekend
- [The return of troughing along the west coast will bring slightly cooler temperatures this week along with an enhanced Zephyr...The pattern will ensure a dry week for Mammoth Lakes....](https://mammothweather.com/2019/07/29/79254/) - Latest update shows an upper off-shore trough will keep our air-mass dry through at least Saturday. The Southwest flow brings both stability to our atmosphere as well as a drier air-mass. Some cooling will occur by midweek with high temps settling back to the mid 70s from a high of 79 on Sunday. Lows at
- [Weather to turn dry again following a wet Thursday...Warmest temps of the Summer Sunday and Monday.....Dry weather to continue through next Friday....Will the Monsoon deliver the final act of the Bluesapalooza?](https://mammothweather.com/2019/07/27/weather-to-turn-dry-again-following-a-wet-thursday-warmest-temps-of-the-summer-sunday-and-monday-dry-weather-to-continue-through-next-friday-will-the-monsoon-deliver-the-final-act-of-the-blue/) - After a brief encounter with the SW Monsoon, The series of upper trofs moving through the pacific NW will deepen, pushing drier air into the region. As the same time, the Continental High will retrograde westward and become stretched East-West, shunting Monsoon moisture to the south over old Mexico. The core of the warm air
- [Southerly flow to provide more showers today and Thursday for Southern Mono County...A drying trend to begin later Friday with a dry and warm Saturday through Tuesday expected....](https://mammothweather.com/2019/07/24/southerly-flow-to-provide-more-showers-today-and-thursday-for-southern-mono-county-a-drying-trend-to-begin-later-friday-with-a-dry-and-warm-saturday-through-tuesday-expected/) - Although Mammoth Lakes did not pick up any showers on Tuesday, showers and thunderstorms developed from the north, to the east and southeast with ground reports indicating of over an inch of rain over the Rock Creek Lake area as reported by the owners of the resort. Other areas including Tioga, Bodie Hills, Doe Ridge,
- [Warmer Days ahead as Continental High strengthens over the Desert SW initiating Monsoon Pattern next week.....Although this is late this year...This completes the transition to Mid Summer Weather.....](https://mammothweather.com/2019/07/18/warmer-days-ahead-as-continental-high-strengthens-over-the-desert-sw-initiating-monsoon-pattern-next-week-although-this-is-late-this-year-the-completes-the-transition-to-mid-summer-weather/) - Wednesday Evening the 17th. The global models are making the change to a warmer pattern beginning this weekend and next week in Mammoth with a strengthening Continental Upper High, retrograding further west. Expect an increase of precipitable water early next week. The Owens Valley will become more humid with a chance of thunderstorms beginning Tuesday.
- [Slightly cooler weather ahead with stronger Zephyr expected into early next week...Another dry 7 days ahead....Monsoonal flow becomes more likely between the 21st and 27th of July.](https://mammothweather.com/2019/07/13/slightly-cooler-weather-ahead-with-stronger-zephyr-expected-into-early-next-week-another-dry-7-days-ahead/) - Wednesday Evening the 17th. The global models are making the change to a warmer pattern next week in Mammoth with a strengthening Continental Upper High, retrograding further west. Expect an increase of precipitable water early next week. The Owens Valley will become more humid with a chance of thunderstorms beginning Tuesday. The flow becomes southerly
- [Cooler Breezy Weather the next few days followed by a warm up mid week.....A few isolated thunderstorms are possible Wednesday thru Friday.....High temperatures still running below seasonal norms....](https://mammothweather.com/2019/07/07/cooler-breezy-weather-the-next-few-days-followed-by-a-warm-up-mid-week-a-few-isolated-thunderstorms-are-possible-wednesday-and-friday-high-temperatures-still-running-below-seasonal-norms/) - Wow! Temps really warmed up today....74 in town. That may not seem like much, however, the spread was only 6 degrees from the Mammoth AP vs 10 yesterday. We have lost a lot of the cool air associated with the trof as it is gone. Expect highs to climb now into the upper 70s this
- [Forecast models now delay the demise of the West Coast Trof until the 9th....Transition to much warmer pattern now about mid week next week....](https://mammothweather.com/2019/07/01/forecast-models-now-delay-the-demise-of-the-west-coast-trof-until-the-8th-transition-to-summery-pattern-now-about-mid-week-new-week/) - Our persistent west coast trough looks likely to hang on now through the end of this week. This will delay the normal lapse rates between Mammoth and Mammoth AP until early next week. Expect our afternoon and evening zephyr stronger than desired. High temps have been running mid to upper 60s at 8K with afternoon
- [Upper Trof off the west coast will weaken by weeks end and allow temperatures to rise next week with lighter afternoon winds.....Much warmer temperatures in our future the week following July 4th......Monsoon weather may accompany WX pattern between the 8th and 15th of July....](https://mammothweather.com/2019/06/28/upper-trof-off-the-west-coast-this-week-will-weaken-by-weeks-end-and-allow-temperatures-to-rise-next-week-with-lighter-afternoon-winds-much-warmer-temperitures-in-our-future-the-week-following-jul/) - The quasi permanent upper Trof off the west coast is showing signs of weakening and disappearing the week following July 4th. High pressure building over Alaska -(Negative EPO) will begin to stretch the upper trof more west-east this Sunday into next week allowing height rises over the far west (Warmer Temperatures) . This will bring
- [Warmer Days ahead as high pressure builds strongly into California, highs in Mammoth mid to upper 70s by mid week.....upper ridge shifts east Wednesday as heat related thunderstorms develop here and there...it will be a bit cooler into the following weekend..](https://mammothweather.com/2019/06/08/warmer-days-ahead-as-high-pressure-builds-strongly-into-california-highs-in-mammoth-mid-to-upper-70s-by-mid-week-upper-ridge-shifts-east-wednesday-as-heat-related-thunderstorms-develop-here-and-t/) - Looks like the idea of winter weather going more directly into a Summer is becoming more of a reality in the weather charts. Periods of strong heights rises show up in several periods weeks one and two. It looks to be a mix of sunshine... some periods of afternoon thunder as periodic weak trofs come through
- [Showers and thunder will begin to diminish Monday as high pressure builds over the region....Temperatures will climb well above normal  by midweek..... Breezy weather with cooler temps to return by Friday](https://mammothweather.com/2019/06/02/showers-and-thunder-will-begin-to-diminish-monday-as-high-pressure-builds-over-the-region-temperatures-will-climb-well-above-normal-by-midweek-breezy-weather-with-somewhat-seasonal-temps-to-r/) - As the upper low moves out of Southern California, expect diminishing chances of showers and thunder Monday through Tuesday with Wednesday’s weather the nicest since late last summer..... highs will be in the low 70s. Winds will come up as early as Thursday and may continue at least moderate into Friday, as a vigerious
- [Current Long wave Trof over the west reloads one last time with showers increasing again.....Block over NW Territories breaks down by Sunday and weather returns more seasonal like next week.....](https://mammothweather.com/2019/05/29/current-long-wave-trof-over-the-west-reloads-one-last-time-with-showers-increasing-again-block-over-nw-territories-breaks-down-by-sunday-and-weather-returns-more-seasonal-like-next-week/) - Our West Coast Trough is forecasted to deepen again as more energy is diverted anomalously south over the far west. This will lead to an increase in moisture, dynamics and showers and thunderstorms. The process begins Wednesday with mainly afternoon and evening showers increasing each day through Friday. The Weekend looks unsettled as well with
- [Another cold spring storm to add to record May snowfall.....blocking pattern to break down next week.....](https://mammothweather.com/2019/05/25/another-cold-spring-storm-to-add-to-record-may-snowfall-blocking-pattern-to-break-down-next-week/) - Monday AM May 27th Chilly! Mammoth Mt reported 3 inches of new. Not nearly what was forecasted but fresh powder.... 25 degrees early this AM. Yesterday’s high 35. 30 degrees below normal. Were deep in the solar minimum... The weather this week is highlighted by the break down of the blocking pattern over NW territories
- [Another Cold Storm headed for Mammoth Saturday night into Sunday with well below normal temperatures.....Weather to remain cold next week with additional snowfall.....](https://mammothweather.com/2019/05/17/another-cold-storm-headed-for-mammoth-saturday-night-into-sunday-with-well-below-normal-temperatures-weather-to-remain-cold-next-week-with-additional-snowfall/) - Mammoth Locals enjoyed a chilly dry Friday with winter ski and board conditions on 12 to 18 inches of fresh powder. The mountain is open for skiing and boarding from 7:00AM to 2:00PM daily. The next weather system has another smaller subtropical connection that will allow for another 6 to 12 inches of snowfall on
- [A Series of Strong Springs storms will bring wind...Cold and Snow to the high country....High temperatures Thursday will be more early March like with some moderation upwards into the weekend.....](https://mammothweather.com/2019/05/14/a-series-of-strong-springs-storms-will-bring-wind-cold-and-snow-to-the-high-country-high-temperatures-thursday-will-be-more-early-march-like-with-some-moderation-upwards-into-the-weekend/) - Wednesday AM Update: The QPF has been grossly increased for this first storm as a powerful for May, Atmospheric River slams into the Southern Sierra. Here are the point forecasts for snowfall for the Mammoth Lakes area from the NWS, through Friday AM Mammoth Mt: Tonight - 5 to 9 inches; Thursday - 6
- [Short term warm up to be followed by more unsettled weather....Beginning as early as Saturday...Then more likely Sunday and Monday....After a Warm up Thursday into Saturday...It will be cooler Sunday into next week.....](https://mammothweather.com/2019/05/02/short-term-warm-up-to-be-followed-by-more-unsettled-weather-beginning-as-early-as-saturday-then-more-likely-sunday-and-monday-it-will-be-cooler-sunday-into-next-week/) - Saturday night....5-4-2019 Several forcing mechanisms will be affecting our weather this new week with the current upper low moving into Southern Ca and yet another that will develop off the coast of So Cal later this week. It all adds up to an active week of showers and thunderstorms for Mono County with high elevation
- [Cooler Days Ahead through Tuesday as a small upper low heads east, south of Mammoth then Dry Northerly Cold Front furthers cooling Tuesday into Wednesday AM....Cool showery weather may return the following weekend....](https://mammothweather.com/2019/04/29/cooler-days-ahead-through-tuesday-as-a-small-upper-low-heads-east-south-of-mammoth-then-dry-northerly-cold-front-furthers-cooling-tuesday-into-wednesday-cool-showery-weather-may-return-the-followi/) - Its been a fabulous few days, enjoying the spring thaw and the warm high country sun.... The Forecast models show a small upper low moving the Southern CA and Northern Baja today and tonight. Unstable air will interact with the high mid August like sun today for a chance of mainly high elevation showers Monday.
- [Weak double hit this weekend will provide some showers and cooler weather.....Warm up expected early next week.....Long Range models not showing any signifacant storms for the rest of April.....](https://mammothweather.com/2019/04/19/weak-double-hit-this-weekend-will-provide-some-showers-and-cooler-weather-warm-up-expected-early-next-week-long-range-models-not-showing-any-signifacant-storms-for-the-rest-of-april/) - No surprises this morning...upper low over Vegas. It will move slowly east...Then begin to accelerate eastward Tuesday, with the affect of lighter winds as the day goes on. Light breezes are expected Tuesday night and Wednesday. It will warm between 10 and 15 degrees by Wednesday. It will be a bit cooler next weekend with
- [More snow showers on tap for Thursday/Ngt....then the on again off again unsettled weather makes an exit by the middle of next week with Spring Thaw conditions insight prior to the following weekend....However, the last Week of April looks stormy again.....](https://mammothweather.com/2019/04/10/more-snow-showers-on-tap-for-thursday-ngt-then-the-on-again-off-again-unsetteled-weather-makes-an-exit-by-the-middle-of-next-week-with-spring-thaw-insight-prior-to-the-following-weekend-however/) - Typical unsettled Spring Weather will continue with nice days interlaced with days offering snow showers. Thursday afternoon and evening will offer some snow showers as well as late Sunday Night through Tuesday. Amounts will be light on Mammoth Mt with 5 day totals of a few inches. Another weather system Monday night into Tuesday
- [Changes ongoing over the Western Hemisphere will deliver more wind than anything else....Some rain possible in town by Early Tuesday AM....followed by Snow Showers Tuesday....Thursday and Friday...Blustery Weather at Resort Levels expected Thursday night and Friday....followed by much calmer Weekend...](https://mammothweather.com/2019/04/08/changes-ongoing-over-the-western-hemisphere-with-deliver-more-wind-than-anything-else-some-rain-possible-in-town-by-early-tuesday-am-followed-by-snow-showers-tuesday-thursday-and-friday-blu/) - Our upper air Alaskan High has broken down in the mean and low pressure is developing in its place as the EPO teleconnection switches Positive.....The transition spells out a windy period for the high country as the last in the series of western progressive trofs come through Tuesday. This will lend to a Springtime Great
- [Alaskan blocking pattern still keeping CA unsettled with no end in sight.....light to moderate snow producing systems likely to continue through mid April....](https://mammothweather.com/2019/04/01/alaskan-blocking-pattern-still-keeping-ca-unsettled-with-no-end-in-sight-light-to-moderate-snow-producing-systems-likely-to-continue-through-mid-april/) - April 5th Fridays weather system continues to weaken as it lifts to the NE. Amounts of snowfall will be very light with little accumulation. Mammoth will have a bit cooler weakend than what was forecasted but certainly milder than past days. Highs will climb into the low to mid 50 while lows at night in
- [A Spring Storm System will bring heavy snow overnight with showers Wednesday afternoon and Thursday......Skies will clear by Friday with seasonal temperatures expected by weeks end.......No major storms expected the following week.....](https://mammothweather.com/2019/03/26/a-spring-storm-system-will-bring-heavy-snow-over-night-with-showers-wednesday-afternoon-and-thursday-skies-will-clears-by-friday-with-seasonal-temperatures-expected-by-weeks-end-no-major-st/) - The winds have been blowing throughout the high country the past 24 hours with stronger gusts expected today. Expect increasing cloudiness today with a slight chance of snow this afternoon.....A Winter Storm Warning is in effect, beginning at 1100pm tonight through 1100pm Wednesday night. Snow fall amounts are expected in the 6 to 12 inch
- [Beautiful Weekend in Play with Spring in the Air.....Vernal Equinox arrives early this year as Winter shifts into Spring...Unsettled weather returns Wednesday into the weekend..](https://mammothweather.com/2019/03/16/beautiful-weekend-in-play-with-spring-in-the-air-vernal-equinox-arrives-early-this-year-as-winter-shifts-into-spring-unsettled-weather-returns-wednesday-into-the-weekend/) - March 20th....7:15am Mammoth Mt reports 7 to 10 inches of snow overnight.....the WX front with this storm is through Mammoth....However there are several VORT centers that will keep the weather showery today through Thursday. There is another 2 to 4 inches over the upper elevation possible through tomorrow. So the secondary’s will roll in tonight
- [Cold unsettled pattern to continue through mid-week next week.......As Winter winds down....A hole new set of concerns arrive....localized and lower level flooding Throughout California.......](https://mammothweather.com/2019/03/08/cold-unsettled-pattern-to-continue-through-mid-week-next-week-as-winter-winds-down-a-hole-new-set-of-concerns-arrive-localized-and-lower-level-flooding-throughout-california/) - March 18th 8:30AM After a beautiful weekend, another series of storms will approach for mainly Southern and Central CA. High pressure aloft has formed a block over British Columbia Canada. The westerlies are forced underneath into CA. The systems are coming in negative tilt and so southerly flow will highlight the precipitation probabilities and thus
- [One more slider system to bring showers tonight while upper ridge builds in Wednesday and Thursday......Fair and warm St Patty’s Day......Then beware of the ides of March.....](https://mammothweather.com/2019/03/12/one-more-slider-system-to-bring-showers-tonight-while-upper-ridge-builds-in-wednesday-and-thursday-fair-and-warm-st-pattys-day-then-beware-of-the-ides-of-march/) - Thursday PM Quite weather pattern to continue through Monday with highs climbing to the low 50s by Sunday and Monday, lows at night will in the teens then 20s late weekend.... Pattern next week looks wimpy compared to the storms of February. Nevertheless, mainly light to moderate precipitation is expected Tuesday night into Wednesday. There
- [Stormy February into March Pattern transition underway with much less snowfall in our medium range.....Longer Range seems to be continuing the trend through the next week.....](https://mammothweather.com/2019/03/07/stormy-february-into-march-pattern-transition-underway-with-much-less-snowfall-in-our-medium-range-longer-range-seems-to-be-continuing-the-trend-through-the-next-week/) - Our stormy pattern associated with this winters robust eastern pacific trof is weakening. This particular trof seems to be coming in, in parts now. As a result, different parts of California will have different experiences with this pattern. We may have some light snowfall into tonight. However, light snow showers seem to be the way
- [Current storm system continues to dump snow on Mammoth Mt Saturday,  while next AR takes aim on the High Country Tuesday.....Several low pressure systems expected to migrate through our area Wednesday through Friday.....Colder air on the way for Friday.......MJO starting to be affected by ENSO....Diving into the circle of death.....](https://mammothweather.com/2019/03/02/storm-system-continues-to-dump-snow-on-mammoth-mt-saturday-while-next-ar-takes-aim-on-the-high-country-tuesday-several-low-pressure-system-expected-to-migrate-through-our-area-wednesday-through-fr/) - Wednesday 9:40AM The snow plot at 9000 Feet showed about 3 inches of water and at the ambient temperatures at the summit in the mid 20s that would translate to at least 2.5 feet of new snow at the summit. Another 2.5+ inches is expected through mid day Friday and so we may hit that
- [Main Upper Jet continues to be aimed at Northern CA with its Moderate AR....Snow for Mammoth to begin late very tonight into Thursday.....Unsettled weather likely this weekend and next week...](https://mammothweather.com/2019/02/26/main-upper-jet-continues-to-be-aimed-at-northern-ca-with-its-moderate-ar-snow-for-mammoth-to-begin-late-tonight-into-thursday-unsettled-weather-likely-this-weekend-and-next-week/) - 2/27/2019. 5:00am The AR has weakened and moved south into Mono County this morning and light to moderate snow fall can be expected through Thursday. Amounts above 7500 feet including the town will vary between 4 and 12 inches by Thursday afternoon. There will be a break Friday with a small storm Saturday. There appears
- [Cold weather to remain this week with light snowfall Wednesday night and Thursday......Pattern Transition likely next week....](https://mammothweather.com/2019/02/19/cold-weather-to-remain-this-week-with-light-snowfall-wednesday-night-and-thursday-pattern-transition-likely-next-week/) - Thursday AM the 21st... looking at the 00z ecmwf and gfs...they come to agreement at this time of bringing the bulk of the precipitation with the initial AR to Northern California with the biggest push of precipitation for Mammoth beginning about March 1st through that 1st weekend of March. There after, there will be a
- [Mammoth Mt 5 Day Summit Storm Total 102 inches with base at top closing in on 20 Feet....The remainder of week will be cold with periods of light snow.....Week 2 still in question.....](https://mammothweather.com/2019/02/18/mammoth-mt-summit-storm-total-102-inches-the-remainder-of-week-will-be-cold-with-periods-of-light-snow-week-2-still-in-question/) - It appears that we have come to an end of the big storm for the month of February. The weather will be cold through the end of this week with temperatures running some 15 to 20 degrees below normal. A California slider will bring a reinforcing shot of cold air into California Wednesday night and
- [Mammoth Mt Boasts biggest February on Record with up to 23 feet of New Snow.....Current storm total  up to 7 feet with another 12 to 18 inches on the way.....](https://mammothweather.com/2019/02/16/mammoth-mt-boasts-biggest-february-on-record-with-up-to-27-feet-of-new-snow-current-storm-total-up-to-7-feet-with-another-12-to-18-inches-on-the-way/) - Sunday...the 17th, The GFSX just finished running and not surprisingly it too has picked up on the retrogression of the eastern pacific ridge next weekend and the eventuality of the -EPO blocking pattern over Alaska. The resulting westerly flow undercuts the block and sets up a milder mid pacific storm track, compared to the more
- [Although the end in storms may be near....It is now unlikely through next weekend with more of the same headed our way.......MJO stuck in Phase 8....is another AR looming for week 2 or 3?](https://mammothweather.com/2019/02/15/although-the-end-in-storms-may-be-near-it-is-now-unlikely-through-next-weekend-with-more-of-the-same-headed-our-way-mjo-stuck-in-phase-8-pattern-is-more-like-a-el-nina/) - Mammoth had a good old-fashioned blizzard today. Strong gusty winds, and white out conditions challenged the best of drivers. Although in the longer term, the american models (GFS) want to shift the big trof in the west to the east, (WEEK 2), The euro is stuck with its western trof and as long as the
- [The End is Near!......That is the end of the Big February storms....Next week looks dry and cold......](https://mammothweather.com/2019/02/12/the-end-is-near-that-is-the-end-of-the-big-february-storms-next-week-looks-dry-and-cold/) - Wednesday Evening.... So Far about 8 inches of the wet stuff has fallen on the snow plott at the main lodge. With about 2.75 inches of water EQ. Pretty Wet! As far as the storm....It has barely started! What we have had is warm air advection without any vertical motion to speak of. Tomorrow,
- [Mammoth Braces for yet another storm...This time it will be wet with moisture flowing NE from the Hawaiian Islands followed by Colder snow on Thursday.....Pattern to remain mostly active throught he weekend with weaker storms....then cold inside slider pattern setting up next week...](https://mammothweather.com/2019/02/11/mammoth-braces-for-yet-another-storm-this-time-it-will-be-wet-with-moisture-flowing-ne-from-the-hawaiian-islands-followed-by-colder-snow-on-thursday-pattern-to-remain-mostly-active-throught-he-w/) - Abundant moisture is one again headed for the Eastern Sierra as a storm from the Gulf of Alaska reaches back and phases with a Kona Low north of Hawaii. This pattern has been in the cards for well over a week now, and in some cases, there are still many unanswered questions,. Where will the
- [Mammoth Still digging out from 5 to 6 feet in town...A couple of more storms are on the way.....Another 2 to 3 feet possible for Mammoth Mt over the weekend......MJO Drums are beating the AR Snare for later next week over the Southern Sierra and Southland......](https://mammothweather.com/2019/02/07/a-mammoth-digs-out-from-5-to-6-feet-in-town-a-couple-of-more-storms-are-on-the-way-another-2-to-3-feet-possible-for-mammoth-mt-over-the-weekend-mjo-drums-are-beating-the-ar-snare-for-later/) - Sunday February 10th On the road today Sunday..........just a quick couple of the notes... We’re getting closer to the mid week period and the AR is definetly trending more toward the Central and Southern Sierra for the upcoming week. The AR gets energized by a cold short wave coming from the Gulf of
- [Storms total on Mammoth Mt 7.5 feet to 11 feet and 5 to 6 feet in the Town.....Looks like a two day break before next weather system.....Prey for Sun.....](https://mammothweather.com/2019/02/06/storms-total-on-mammoth-mt-7-5-feet-to-11-feet-and-5-to-6-feet-in-the-town-looks-like-a-two-day-break-before-next-weather-system-prey-for-sun/) - It’s over....At least a repreave. Short wave ridging moving in and there may have been a chirp from a blue bird. The powder is so deep today that you have to be careful when skiing or boarding off trail because of the possibility of immersion suffocation. So take a deep breath when down weighting and
- [Mammoth reports 6.5 to 10 feet of new.....More snow today.....platinum powder alert......](https://mammothweather.com/2019/02/05/mammoth-reports-6-5-to-10-feet-of-new-more-snow-today-platinum-powder-alert-m/) - Our protracted winter storm will be winding down today. However, not before dropping another 5 to 10 inches of Platinum Powder.....the upper low passes to our south this afternoon and so we will see the sun today. The bluebirds will squawk by Wednesday and Thursday.....it will be cold with highs in the teens and twenties.
- [Mammoth Mountain reports storm totals of up to 5 feet over the summit and so we are half way through the sequence....expect double this amount by Tuesday night.......the next storm tonight could be a trans-sierra road closer.....With blizzard conditions developing....Platinum Powder Alert Tuesday and Wednesday AM](https://mammothweather.com/2019/02/03/mammoth-mountain-reports-storm-totals-of-up-to-5-feet-over-the-summit-and-so-we-are-half-way-through-the-sequence-expect-double-this-amount-by-tuesday-night-the-next-storm-tonight-cound-be-a/) - Monday AM Mammoth mt reports 4 to 6 feet storm total so far.... MJO is forecasted to travel to phase spaces 7 8 and most likely 1.....significant atmospheric possible later next week.....southern half of state favored at this time but stay tuned...... —————————————————- Although the polar vortex does not visit the Golden
- [Biggest Storm of the Winter heads for the Sierra bringing Heavy Snow Blizzard Conditions and in the end.....Platinum Powder](https://mammothweather.com/2019/02/01/biggest-storm-of-the-winter-heads-for-the-sierra-bringing-heavy-snow-blizzard-conditions-and-in-the-end-platinum-powder/) - 3:00 PM Saturday, Cold Front now climbing the Sierra with the heaviest snowfall per hour now occurring. Would expect WX front to be through by about 5:00PM and so there may be a brief break and actually some Blue Sky's in back of the front before instability showers redevelop. Note: There is a band of
- [Weather Pattern to turn Active again as 3 Day Winter Storm could bring the largest totals of the season per storm this Winter!  Wound up surface low to bring periods of strong gusty winds with blizzard conditions during two important periods.....Heavy Snowfall to develop Friday Night...with periods of heavy snow Saturday morning, Sunday and Monday......](https://mammothweather.com/2019/01/31/weather-pattern-to-turn-active-again-as-3-day-winter-storm-could-bring-the-largest-totals-of-the-season-per-storm-this-of-the-winter-wound-up-surface-low-to-bring-periods-of-strong-gusty-winds-with/) - The Weekend looks quite stormy with periods of heavy snow with little let up in the snowfall through Monday night....snow showers may continue into Tuesday. Latest guidance from the NAM shows a surface low undergoing rapid cyclogenesis with the surface low deepening from 1002MB 12Z friday to 979mb by 15Z Saturday west of Monterey Bay.
- [Strong Ridge Trough Pattern to Break This Week as Eastern Pacific High Retrogrades just west of 140W Early Week 2.....Long Wave Trof to set up over the inter- mountain west for cold storms and fluffy snow Early Week 2....There may be a few small storms later this week....](https://mammothweather.com/2019/01/27/strong-ridge-trough-pattern-to-break-this-week-as-eastern-pacific-high-retrogrades-just-west-of-140w-long-wave-trof-to-set-up-over-the-inter-mountain-west-for-cold-storms-and-fluffy-snow-beginnin/) - The pattern change at this distance in time is a bit tricky as the Arctic air that is setting up over the Northern Midwest and Great Lakes region is forced to flush east and off shore by the next weekend... Initial track of pacific storms will be from the NW, through the west coast ridge
- [Familiar Ridge-Trough Pattern across the Country brings an end to the Active Pattern of the past several weeks....With Sierra Snowpack now above normal....Winter Sports are in Full Swing!!](https://mammothweather.com/2019/01/22/familiar-ridge-trough-pattern-across-the-country-brings-an-end-to-the-active-pattern-of-the-past-several-weeks-with-sierra-snowpack-now-above-normal-winter-sports-are-in-full-swing/) - Friday; Ok, Sabbatical off but time off to move early next week....We do have a pattern change next week. Both the GFS and CFS, but not yet the ECMWF, are showing the MJO going into Phase 7 which can be wet in early February. SEE: http://www.cpc.noaa.gov/products/precip/CWlink/MJO/CLIVAR/clivar_wh.shtml I use the Phase Space as support for the
- [Stormy Week on Mammoth Mt had resulted in 4 to 7 feet of fresh powder.....One Last smaller storm to bring up to another 8 to 14 inches Sunday Night...Week Long Break likely with next possible storm series beginning about February 1st....El Nino atmosphere coupling no where to be found....All the better!!](https://mammothweather.com/2019/01/18/stormy-week-on-mammoth-mt-has-resulted-in-4-to-7-feet-of-fresh-powder-one-last-smaller-storm-to-bring-up-to-another-6-to-10-inches-sunday-afternoon-and-night-week-long-break-likely-with-next-pos/) - A Winter Weather Advisory is hoisted for Sunday night.... No change in the expected snowfall amounts for either the Mountain or the Town of Mammoth Lakes. 4 to 8 inches in town and some 8 to 14 inches on Mammoth Mt by Monday morning.... After a fair dry Saturday....Snowfall will begin mid to late afternoon Sunday and continue through Sunday night....Snow Showers are expected through Mid Morning Morning.... Snow showers ended this
- [The last but not least of the 3 sierra storms getting ready to hit the high county by Tonight.....Winter Storm Warnings hoisted with a special emphasis on Blizzard Conditions later tonight! A break in the Weather is expected Friday and Saturday with another smaller system expected Sunday night....Next week looks dry with milder temps....](https://mammothweather.com/2019/01/16/the-last-but-not-least-of-the-3-sierra-storms-getting-ready-to-hit-the-high-county-by-tonight-winter-storm-warnings-hoisted-with-a-special-emphasis-on-blizzard-conditions-later-tonight-a-break-in/) - 9:00Am Thursday AM Update: Mammoth Mt Reports 24 hour snowfall amounts up to 4 feet of fresh snow. Winter Storm Warning is in effect until 4:00AM Friday. Upper elevations for the period 4:00AM this morning through 4:00AM Friday could pick up another 1 to 2 feet for a total 5 day snowfall of between 7
- [Series of Storms headed for Central and Southern California...Wet Pattern but no El Nino......](https://mammothweather.com/2019/01/11/series-of-storms-headed-for-central-and-southern-california-wet-pattern-but-no-el-nino/) - Drought Stricken California will likely pick up a Bonanza of rainfall next week, as the next series of storms hits predominantly the southern half of the state. The first in the series hits the South Central Coast Tonight with the focus unfortunately on many of the the burn areas. Being that the storm is coming
- [First in Series of Sierra Storm drops 16 to 24 inches of snow Saturday and Sunday with Winter Storm Warnings hoisted for Sunday afternoon and night....Dangerous Travel conditions expected for the Trans-Sierra highway later this afternoon and tonight as heavy snow and high winds combine for full on blizzard in many areas of Highway.....](https://mammothweather.com/2019/01/06/first-in-series-of-sierra-storm-drops-16-to-24-inches-of-snow-saturday-and-sunday-with-winter-storm-warnings-hoisted-for-sunday-afternoon-and-night-dangerous-travel-conditions-expected-for-the-tran/) - 6:20pm Update: Snowfall rates have increased in the Town of Mammoth with about 4 inches of new on the ground. We are expecting between 1 and 2 feet between the Town of Mammoth and the Mammoth Crest by Morning. Winds:The prime time for high winds will be after 9:00-11:00 PM as precipitation rates in Mono
- [Forecast Models Still Struggling with Split flow over or just west of California...Trend of late is for storms to be more consolidated as they come in with SSW flow offering high end moderate precipitation totals..... A winter Weather Advisory has been issued for Mono County beginning at 10:00AM Saturday....to 10AM Sunday...](https://mammothweather.com/2019/01/03/forecast-models-still-struggling-with-split-flow-over-or-just-west-of-california-trend-of-late-is-for-storms-to-be-more-consolidated-as-they-come-in-with-ssw-flow-offering-high-end-moderate-precipit/) - Updated Saturday AM 5:00AM: Officially our forecast area is under a winter weather advisory for Saturday at 10:00AM through Sunday 10:00AM. However, the models did come in a bit wetter this afternoon. So in order to keep from yo-yoing the winter weather advisory will remain, Nevertheless, I believe that it is quite possible to reach
- [Another Cold Shot of Energy dropping South through the Great Basin with Snow Showers Monday then Moderating Temperatures into the first week of the New Year.....There are an increasing number of ensemble members of most global models touting the return of an Active Pattern by next weekend.....However, this is a pattern with a lot of splitting going on.....](https://mammothweather.com/2018/12/30/another-cold-shot-of-energy-dropping-south-through-the-great-basin-with-snow-showers-monday-then-moderating-temperatures-into-the-first-week-of-the-new-year-there-are-an-increasing-number-of-ensem/) - January 1st, 2019 Days will be milder beginning Wednesday with seasonal temps for Thursday and Friday....There will be a return of the 40s for highs Thursday and Friday. Lows near zero of late, will rise to the 20s....lighter winds aloft will be highlighted. Upcoming pattern shows promise to bring significant snowfall beginning this weekend. However,
- [Cold Inside Slider pattern will bring snow showers and cold temperatures to the high country...Gusty Winds over the higher elevations prompts the awareness of a Wind Chill-Factor..... Temperatures to moderate over the weekend....No Major Storms in sight....](https://mammothweather.com/2018/12/27/cold-inside-slider-pattern-will-bring-snow-showers-and-cold-temperatures-to-the-high-country-gusty-winds-over-the-higher-elevations-prompts-the-awareness-for-wind-chill-wind-factor-temperatures/) - 12/29/2018 10:00AM Thoughts about the long range.... When ever I see a possible series of storms during any month of Winter in the week 2 period, IE in this case, between January 5th and the 11th, I always look to see where and how strong the MJO is. The MJO has a statistical relationship to the
- [Forecast Models Coming in a Bit wetter today for the Christmas eve storm.....thereafter...inside slider pattern to wrap up the year with below normal temps and periods of mainly light snowfall....January will begin mostly on a dry note](https://mammothweather.com/2018/12/23/forecast-models-coming-in-a-bit-wetter-today-for-the-christmas-eve-storm-thereafter-inside-slider-pattern-to-wrap-up-the-year-with-below-normal-temps-and-periods-of-mainly-light-snowfall-janu/) - Warm Frontal precip began in Mammoth around 3:30PM, however UVM related precip will start about 8:30pm tonight.. 12:30pm Christmas Eve; looks like our storm has slowed a bit. It's beginning looks to start between 8:00pm to 9:00pm tonight. Looking for snowfall accumulations between 12 and 18 inches between Main lodge and the upper bowls by
- [Christmas week to be quite cold throughout California with Snowfall for the Sierra....Longer range has a lot to do with what the MJO does....El Nino going to play a major role this winter!](https://mammothweather.com/2018/12/18/christmas-week-to-be-quite-cold-throughout-california-with-snowfall-for-the-sierra-longer-range-has-a-lot-to-do-with-what-the-mjo-does-el-nino-going-to-play-a-major-role-this-winter/) - Dec 21, 2018 Dynamic Models Showing MJO into Phase 6 Toward end of year....Pattern to shift to inside slider pattern after Christmas, then potentially Strong Upper Eastern Pacific Ridge for a period of time afterwards in early January. 12-19-2018 Wednesday 9:15AM:Observations and thoughts:1. MJO now moving into phase space 52. Both GFS and ECMWF have
- [Winds Coming up Sunday will usher in Light to Moderate Storm System with some 5 to 10 inches expected over the upper elevations....2 to 5 inches in the Town of Mammoth....Pattern transition to colder NW sliders Christmas week with a hint of Retrogression in Western Hemi Pacific Pattern toward the New Year...](https://mammothweather.com/2018/12/15/winds-coming-up-sunday-will-usher-in-light-to-moderate-storm-system-with-some-5-to-10-inches-expected-over-the-upper-elevations-2-to-5-inches-in-the-town-of-mammoth-pattern-transition-to-colder/) - Weather Update at 1:00pm Tuesday..... Saturday 4:40PM Update: Just had a peak at the Euro this afternoon, and it too is on board for either northwest or inside sliders beginning Christmas Day and another later that week. This is a chilly pattern with generally light amounts of snowfall. Snow to Water Ratios will be high....13:1
- [Unsettled weekend on Tap with Wind...Sun and Cloudiness...Seasonal Temps to continue through weeks end....MJO in Phase 3 then 4 will put the Kabash on Storms beyond this Monday for next week....](https://mammothweather.com/2018/12/13/unsettled-weekend-on-tap-with-wind-sun-and-cloudiness-seasonal-temps-to-continue-through-weeks-end-mjo-in-phase-3-will-put-the-kabash-on-storms-beyond-this-monday-for-next-week/) - 12/14/2018 6:45am Global models coming in more consolidated and a bit wetter with the Sunday night system so that's a good point. Still looks like no more than a foot over the crest.... MJO in Phase 4 now propagating quickly according to most models....That's excellent! Contrary to the 8 to 14 outlook, This is an
- [It will be a bit cooler this week with periods of Clouds and Sun and even a little light snow at times....Pattern Change for the weekend will favor better chances of snowfall....](https://mammothweather.com/2018/12/10/it-will-be-a-bit-cooler-this-week-with-periods-of-clouds-and-sun-and-even-a-little-light-snow-at-times-pattern-change-for-the-weekend-will-favor-better-chances-of-snowfall/) - 12/11/18 5:15pm Attended CPC meeting....Presenter indicated that the MJO will remain active and will propagate East into the Maritime Continent. With phases 3 and 4 into well into December. That goes against the idea of a cold period the weekend before Christmas and leans toward above normal temps Christmas Week. More later..... December 11th, 2018:
- [Excellent Snowpack for the beginning of the 2018-2019 Ski Season with up to a 6 Foot Base....Split flow pattern returns to Eastern Pacific offering a Drier Pattern for the next week to ten days with only a few periods of snow showers.....Next Signifacant Stormy Period about the 17th......](https://mammothweather.com/2018/12/07/excellent-snowpack-for-the-beginning-for-the-2018-2019-ski-season-with-up-to-a-6-foot-base-new-split-flow-pattern-will-return-to-eastern-pacific-offering-a-drier-pattern-for-the-next-week-to-ten-d/) - Saturday AM: The headliner says it all...Storm systems will run into Higher Heights as they approach the west coast next week, causing them to weaken, dampen out and even split once inland. This is likely to continue for a full week. There are a few quasi NW or inside sliders that will traverse through as
- [Upper low to move through Southern CA Tomorrow....There will be areas of some heavy rain....Split flow Blues arrives for California through mid month....](https://mammothweather.com/2018/12/05/upper-low-to-move-through-southern-ca-tomorrow-there-will-be-areas-of-some-heavy-rain-split-flow-blues-arrives-for-california-through-mid-month/) - With a 6 foot Base on top, Mammoth Mt has the most snow reported in the country!! Thursday AM: As the upper low off the coast of Southern Ca kicks inland to day, expect lingering snow showers with little or no accumulations. Highs to day will be near freezing in town with lows in
- [Mammoth Mountain Reports 3 to 5 feet of fresh snowfall bottom to top....With another 4 to 7 inches possible tonight and Saturday...Then a nice break Sunday into next week...Only Light to Possibly Moderate snowfall expected next Tuesday and Wednesday...](https://mammothweather.com/2018/11/30/mammoth-mountain-reports-3-to-5-feet-of-fresh-snowfall-top-to-bottom-with-another-4-to-7-inches-possible-tonight-and-saturday-then-a-nice-break-sunday-into-next-week-only-light-to-possibly-mode/) - No surprises this morning... Warm air advection precipitation to began around midnight tonight. CRFC gives the west side about .5 to .6 of an inch of QPF over the next 3.5 days. Amounts on Mammoth Mt look to be less than a foot with the town possibly between 2 and 5 inches over a 3.5
- [Series of Storm Systems to affect the high county through weeks end....Each storm will be colder than its predecessor....Then a welcome break next week.....](https://mammothweather.com/2018/11/27/series-of-storm-systems-to-affect-the-high-county-through-weeks-end-each-storm-will-be-colder-than-its-predecessor-then-a-welcome-break-next-week/) - 1:50PM 11/28/2018 In that the Dweebs will not be updating for a few days or longer, it is noteworthy to let you know that; The Wednesday Through Friday storm is expected top bring storm totals of some 4 to 5 feet by Friday AM on Mammoth Mt. There should be a break Friday afternoon in
- [Major Storm developing by Mid Week with Subtropical Connection....Heavy snowfall and strong winds over higher elevations with Colder Portion of Storm expected Thursday....Several feet of new is expected over Mamoth Mountain by Next Weekend Then....???](https://mammothweather.com/2018/11/25/major-storm-developing-by-mid-week-with-subtropical-connection-heavy-snowfall-and-strong-winds-over-higher-elevations-with-colder-portion-of-storm-expected-thursday-several-feet-of-new-is-expect/) - After a break in the storminess Saturday, Sunday on into Monday, winds will increase again Tuesday with light precipitation developing as early as Tuesday mid day. There appears to be a weak AR that becomes quasi stationary early Tuesday evening and possibly stall through Wednesday over the Central Sierra. So the High country remains in
- [Storm Door Opening first time since last Spring as Moderate Precipitation Producer Approaches....Snowfall expected later Wednesday into Thanksgiving day.....Then a windy system with unsettled weather expected Friday/Ngt.....New storm expected by Mid Week........](https://mammothweather.com/2018/11/21/strom-door-opening-first-time-since-last-spring-as-moderate-precipitation-producer-approaches-snowfall-expected-later-wednesday-into-thanksgiving-day-then-a-windy-system-with-unsettled-weather/) - Sunday 1130am... The Dweebs are traveling today....will update Monday morning. However, get ready for a massive storm midweek. Three feet + over crest. The week 2 forecast looks potentionally omanious as well.....MJO is strengthening in phase space 8 into 1 late this week and next, leading to The potential for a strong negative phase EPO
- [Winter Storm Warning Hoisted for Mono County.....Pattern Change over Eastern Pacific continues with a few more nice days ahead before 1st Winter Storm arrives later Wednesday.....Moderate amounts of Snowfall Expected Wednesday night through Thursday.....Some light wet snow will follow Friday....with some Snow Showers possible Saturday......Sunday Looks Fair.....](https://mammothweather.com/2018/11/19/pattern-change-over-eastern-pacific-contnues-with-a-few-more-nice-days-ahead-before-1st-winter-storm-begins-later-wednesday-moderate-amount-of-snowfall-expected-wednesday-night-through-thursday-mo/) - 4:00PM Update https://forecast.weather.gov/showsigwx.php?warnzone=CAZ073&warncounty=CAC051&firewxzone=CAZ273&local_place1=13%20Miles%20E%20Lee%20Vining%20CA&product1=Winter+Storm+Warning&lat=37.939&lon=-118.887 Storm has slowed a bit with WSW now set for 6:00PM through 6:00AM Thursday Via NWS; Moderate to occasionally heavy snow expected. Total snow accumulations of 6 to 14 inches above 7000 feet, highest west of Highway 395. Up to 4 inches is possible between 6000 and 7000 feet, with little or
- [Although this weeks weather continues dry....Confidence is increasing that a pattern change next week will bring beneficial snows to the sierra and the beginnings to our winter snowpack](https://mammothweather.com/2018/11/15/although-this-weeks-weather-continues-dry-confidence-is-increasing-that-a-pattern-change-next-week-will-bring-beneficial-snows-to-the-sierra-and-the-beginnings-to-our-winter-snowpack/) - 11:30AM Sat: Both 12z EC and 12z GFS have about 2 feet painted over the Mammoth Crest by next Sunday AM the 25th. As mentioned below, the Friday system may have an AR connected with it. SATURDAY MORNING: Good Day Eastern Sierra! It's a beauty!...Highs to day will be in the upper 50s with
- [Upper ridge axis has moved on shore over Northern CA...Upper Ridge will Weaken this week leading to variable high cloudiness...Expect little temperature change through Friday.......Through the weekend ridging will occur west of Washington State while a weak belt of westerlies moves into Southern California....](https://mammothweather.com/2018/11/13/upper-ridge-axis-has-moved-on-shore-over-northern-ca-upper-ridge-will-weaken-this-week-leading-to-variable-high-cloudiness-expect-little-temperature-change-through-friday-through-the-weekend/) - Wednesday AM: There were phasing issues with the 12z run of the GFS.....Waiting for the ECMWF this afternoon. Still too soon to predict how much snow in the high country for the following weekend.. ________________________________________________________________________________________________________________________________ 3:00 PM Tuesday the 13th It is really exciting to see everything coming together nicely in the ensembles.....The pattern looks
- [Chilly Northwest Sliders has put snowmaking on Mammoth Mtn into high gear....Althrough it is another Dry 5 to 7 days ahead...a few NW sliders will keep it chilly......Who's afraid of the Modoki El Nino!](https://mammothweather.com/2018/11/08/chilly-northwest-sliders-has-put-snowmaking-on-mammoth-mtn-into-high-gear-althrough-it-is-another-dry-5-to-7-days-ahead-a-few-nw-sliders-will-keep-it-chilly/) - Monday Night 11:10pm Both 12z GFS and ECMWF have run. EC ensembles have not run yet. It will be very interesting to see which model does the best next week. Huge difference between the two at this time. I still favor the ECMWF as it has been more consistent. It is the wetter scenario. New
- [Storm Door Closed?.......Don't look to the West.......Look East....](https://mammothweather.com/2018/11/05/storm-door-closed-dont-look-to-the-west-look-east/) - Wednesday AM: Forecast remains on track with a chilly NW slider bringing breezy cooler weather to the high country Thursday. Highs will cool to the 40s on Thursday with nights in the teens and 20s there after. The weekend looks fair and dry with seasonal temps. Longer Range is well discussed in the past two
- [A Perspective from All Hallows Eve................](https://mammothweather.com/2018/10/31/a-perspective-from-all-hallows-eve/) - 11/2/2018 Note: Snow has been building in Russia and Canada (especially east and central). It is above normal in most areas. The EPS from the Euro climate model shows snow building up well over the Western Mountains by Mid December. This tells me that we'll have good snow pack for skiing over the Christmas &
- [Change in pattern is still dry...However will be cold enough to start making snow....Winds will pick up Sunday with most Aspens of Strong Autumn Color getting stripped of leaves......Weather to be Chilly for All Hallows Eve....Then Seasonal Temps returning later in the week...Another Cold Slider possible the following Sunday or Monday....](https://mammothweather.com/2018/10/27/change-in-pattern-is-still-dry-however-will-be-cold-enough-to-start-making-snow-winds-will-pick-up-sunday-with-most-of-the-aspen-trees-getting-stripped-of-leaves-weather-to-be-chilly-for-all/) - 10:00am Tuesday: This morning is back to the same idea as the weekend that it will be a cooler day today. Highs near 50. Colder night tonight. Eastern flank of ridge back into CA this weekend for warmer then normal temps and low 60s... Next chance of WX system is the 10th.... Monday
- [Beautiful Weekend Shaping up as warm dry weather expected through Saturday...Strong Subtropical Ridge to give way to Deep Gulf of AK Trof....Early next week](https://mammothweather.com/2018/10/25/beautiful-weekend-shaping-up-as-warm-dry-weather-expected-through-saturday-strong-subtropical-ridge-to-give-way-to-deep-gulf-of-ak-trof-early-next-week/) - The warming trend with continue in the high country as a subtropical ridge builds into Southern CA the next few days. High temps will peak out some 15 degree above normal by Saturday (70). Cooler, breezy weather will develop Sunday as a dry cold front sweeps through the region. A large scale Trof moves from
- [Seasonal Weather to continue through the weekend with mild days and chilly nights....A few showers possible Monday then fair Tuesday......](https://mammothweather.com/2018/10/19/seasonal-weather-to-continue-through-the-weekend-with-mild-days-and-chilly-nights-a-few-showers-possible-monday-then-fair-tuesday/) - Saturday Morning 10/20 Only changes in forecast revel that there will be less cloudiness for the Sierra for Sunday night through Monday night. Still.... There is a slight chance of showers from the weak low off the South Central CA coast. Temperatures may be a few degree cooler Monday through Tuesday. The belt of westerlies
- [First Hard Freeze to the High Country this morning with lows in the teens....Sunny Cool Days ahead with warmer weather this weekend.....Signs of the westerlies sagging south the Last Week of the Month.....](https://mammothweather.com/2018/10/15/first-hard-free-to-the-high-country-this-morning-with-lows-in-the-teens-sunny-cool-days-ahead-with-warmer-weather-this-weekend-signs-of-the-westerlies-sagging-south-the-last-week-of-the-month/) - 10/18/18: Note: By now the rumors are flying about the big AR that is headed for the west coast. The GFS is the wettest for California. However, the ECMWF is dry at this time, so there is not much to chat about. So there is a change in the pattern for the high country,
- [Intermountain Trough of Low Pressure will remain in place the next couple of days locking in below normal temperatures along with the possibility of Snow Showers along the Eastern Slopes of the Sierra...Mainly Between Tonight and Thursday Evening.....Only a very light dusting is expected...Expect a warming trend this weekend into next week with dry weather.....](https://mammothweather.com/2018/10/10/intermountain-trough-of-low-pressure-will-remain-in-place-the-next-couple-of-day-locking-in-below-normal-temperatures-along-with-the-possibility-of-snow-showers-along-the-eastern-slopes-of-the-sierra/) - As highlighted above, the aforementioned intermountain Trof will remain in place through Thursday, but will split on Friday as the northern portion progresses east into the northern Mid West and the southern part spins up off the coast of Southern CA. At the moment, it is expected that Mammoth Will remain north of the favorable
- [Forecast models have now converged on a wetter solution for the sierra with anywhere from between 1/2 inch to up to an inch of precip through this Thursday......The snow level for most of the event will be above 10,000 feet](https://mammothweather.com/2018/10/01/forecast-models-have-now-converged-on-a-wetter-solution-for-the-sierra-with-anywhere-from-between1-2-inch-to-up-to-an-inch-of-precip-through-this-thursday-the-snow-level-for-most-of-the-event-wil/) - 8:30AM Thursday; 10/4 good buddy Upper closed low opened into a short wave last night and was located over Northern AZ this morning. Two more short waves to go, through the week's end. One today and one Saturday. Each has the potential bring us light precipitation amounts. Today's outlook shows about one-quarter inch and a
- [First Fall Storm of the wet season making its way to California early next week.....Precipitation is likley but how much....Never trust a storm this time of the year!.....](https://mammothweather.com/2018/09/28/first-fall-storm-of-the-wet-season-making-its-way-to-california-early-next-week-precipitation-is-likley-but-how-much-never-trust-a-storm-this-time-of-the-year/) - 9/29/2018 Fridays Headline is above still applicable for this afternoon Saturday. Models still struggling with pattern along with TS Rosa moisture. New ECMWF is back again from three days ago bringing in a 3rd system that is colder for Midweek. More moisture from Rose is in play as well with the Tuesday and Wednesday time
- [Enjoy the next few very nice days ahead as major pattern change takes shape.....Undercutting storm track may pick up some badly needed moisture from TS Rosa for good precip producer next week.......](https://mammothweather.com/2018/09/26/enjoy-the-next-few-very-nice-days-ahead-as-major-pattern-change-takes-shape-undercutting-storm-track-may-pick-up-some-badly-needed-moisture-from-ts-rosa-for-good-precip-producer-next-week/) - 9/27/2018 AM Update Forecast models have come in considerably drier this morning with precipitation for the Tuesday and Wednesday time frame. TS Rosa will not, as of this time, be a player in contributing any additional moisture to the system for the Sierra next week. That closed low approaches the coast Monday, then drops SE
- [First week of fall to end on a Summery note then cooler, breezy weather developing over the weekend.....First week of October looks cooler than normal with showers possible.....](https://mammothweather.com/2018/09/25/first-week-of-fall-to-end-on-a-summery-note-then-cooler-breezy-weather-deveoping-over-the-weekend-first-week-of-october-looks-cooler-than-normal-with-showers-possible/) - Dweebs were back at it this morning with our first fall forecast. Of note, the MJO is amplifying in phase space 8 and is expected to track east into phase space 1. This area of tropical forcing moves through the Western Hemisphere and Africa next week. Highlights of this action now, are the intense mesoscale
- [Last week of Fall to fair and mild with dry weather expected through the 24th.](https://mammothweather.com/2018/09/11/autumn-like-weather-sets-in-this-week-as-trof-from-the-gulf-of-ak-pushes-south-of-the-pacific-nw-into-northern-california-cooler-weather-is-on-the-way-with-breezy-weather-as-well/) - 9/15/2018 Last week of summer to finish on a quiet note with season temperatures and breezy weather at times....Some high clouds expected on Tuesday along with some stronger breezes. High temps this week will range from the mid 60s to low 70s.....Lows in the 30s and 40s. Next update on the 24th.... Dr
- [Mammoth can expect beautiful warm weather this weekend under the effects of a Subtropical ridge centered to the Southwest of the Crest....The ridge weakens in a few days as troughing sets in over the pacific NW.....So cooler, breezy weather is expected midweek...](https://mammothweather.com/2018/09/08/mammoth-can-expect-beautiful-warm-weather-this-weekend-under-the-effects-of-a-subtropical-ridge-centered-to-the-southwest-of-the-crest-the-ridge-weakens-in-a-few-days-as-troughing-sets-in-over-the/) - Its a beautiful weekend in Mammoth. Clear skies, above normal temps and light breezes can be expected to continue through Monday. High temperatures in the upper 70s and lows in the 40s are the expected diurnal temperature spread. Summer weather is expected to continue with another warm up the following weekend after a cooler breezy
- [Broad area of weak low pressure located over Great Basin will bring the chance of showers and thunderstorms today and Wednesday......Drier air will work back in Thursday with a breezy Friday, followed by a fair warm weekend.....Near seasonal temperatures are expected...then warmer than normal this weekend...](https://mammothweather.com/2018/09/04/broad-area-of-weak-low-pressure-located-over-great-basin-will-bring-the-chance-of-showers-and-thunderstorms-today-and-wednesday-drier-air-will-move-back-in-thursday-with-a-breezy-friday-followed/) - A weak trough of low pressure over the Great Basin today will present conditions favorable for the chance of showers and or thunderstorms this afternoon and evening over the Sierra Crest. The upper low will slowly move east on Wednesday, but lingering instability will keep a small threat of storms to continue Wednesday for the
- [Beautiful Week Ahead for the High Country as Meteorological Summer comes to an end this week....First week of Meteorological Fall looks Magnificant as September begins with seasonal temps then warming above normal......Super Typhoon Jebe Will constructively phase with westerlies...Effects down-stream the following weekend.....](https://mammothweather.com/2018/08/27/beautiful-week-ahead-for-the-high-country-as-meteorological-summer-comes-to-an-end-this-week-first-week-of-meteorological-fall-looks-magnificant-as-september-begins-with-seasonal-temps-then-warming/) - August 31st, 2018 No changes in the short or medium range outlooks today. Weather to remain fair and warm through Wednesday the 5th..... Super Typhoon Jebe has really spun up the past 48 hours and is now a super typhoon. Both GFS and ECMWF have it recurving to the North west then North next
- [Seasonal Temperatures to Continue into the foreseeable future with Breezy Weather Sunday.....Little Change to this Dry Pattern Next Week.....El Nino....Full Basin or Modoki....](https://mammothweather.com/2018/08/24/seasonal-temperatures-to-continue-into-the-foreseeable-future-with-breezy-weather-sunday-little-change-to-this-dry-pattern-next-week-el-nino-full-basin-or-modoki/) - Aug 27Th. The Weather for the new week looks warm and dry with seasonal temperatures. That means that highs in Mammoth will continue in the mid 70s with lows at night in the 30s and 40s. Winds are on the decrease today Monday as the Trof in the Pacific NW shifts off to the east.
- [The Long Extended Heat Wave over Northern and Central CA is coming to an end later this Month as the Excessive Hot Summer Pattern Breaks Down.......More Seasonal Temperatures are expected by next weekend or at the latest the following week....Autumn chill to arrive.....just in time for Meteorological Fall....](https://mammothweather.com/2018/08/19/the-long-extended-heat-wave-over-northern-and-central-ca-is-coming-to-an-end-later-this-month-as-the-excessive-hot-summer-pattern-breaks-down-more-seasonal-temperatures-are-expected-by-next-week/) - Unrelated to mammoth weather....Interesting discussion on Hurricane Lane now south of Hawaii from NHC this morning; The initial motion estimate is 350/5 knots, which shows a northward turn has occurred this evening. Lane continues to be steered toward the north along the western side of a mid-level ridge, which is located to the east
- [Another day of Scattered Thunderstorms then drier and warmer weather expected for the weekend.....](https://mammothweather.com/2018/08/15/another-day-of-scattered-thunderstorms-then-drier-and-warmer-weather-expected-for-the-weekend/) - There has been a nice few days of thunderstorms in the high country with hail yesterday over the Lakes Basin. Expect one more day of it today, then a much drier and warmer airmass sets in. Strong height rises occur Friday and Saturday much like the pattern we have had all summer that has been
- [Change in Pattern Underway with a Slightly Cooler Weekend with Zephyr Winds during Afternoon and Evening Hours...Details below](https://mammothweather.com/2018/08/10/change-in-pattern-underway-with-a-cooler-weekend-with-zephyr-winds-during-afternoon-and-evening-hours-details-below/) - Sunday AM Update: Persides meteor shower peaks tonight...mainly after Midnight....See if you can spot a few... A summer storm moving into Washington State will flatten our strong high pressure system over California and Nevada. This will initially bring an increase of afternoon and evening breezes to the area along with cooler temperatures. Monsoon
- [Well Above Normal Temperatures have returned to the High Country with Breezy Weather expected Friday and Saturday....Will the Upper Ridge Rebuild Again Next Week for More Very Warm Weather?](https://mammothweather.com/2018/08/08/well-above-noprmal-temperatures-have-returned-to-the-high-country-with-breezy-weather-expected-friday-and-saturday-will-the-upper-ridge-rebuild-again-next-week-for-more-very-warm-weather/) - Smoky conditions during the early evening hours last night dissipated this morning. Strong high pressure aloft will concentrate smoke over the fires then as Zephyr winds increase during the afternoon, they will carry some eastward Wednesday. So expect good air quality in the morning with poor air quality returning during the early to mid afternoon
- [Nice Fresh Air Morning as southerly flow keeping most smoke to our north this morning....Upper flow starting to back from the Southwest, So expect that to change...ESE flow to arrive by Tuesday.....](https://mammothweather.com/2018/08/05/nice-fresh-air-morning-as-southerly-flow-keeping-most-smnoke-to-our-north-this-morning-upper-flow-starting-to-back-from-the-southwest-so-expect-that-to-change-se-flow-to-arrive-by-tuesday/) - Winds continue to diminish this late morning over the ridges from the south. Again, as in the header.....This has kept much of the smoke to our north and thus smoke from fires are effecting Alpine County and Northern Mono the most..... Last few hours upper flow is becoming southwest again. The Dweebs expect smoke from
- [Critical "fire weather" set up today Saturday as Rare for Summer upper jet of 100 knots is forecast to move from Northern CA over the Sierra Today.....](https://mammothweather.com/2018/08/04/critical-fire-weather-weather-set-up-today-saturday-as-rare-for-summer-upper-jet-of-100-knots-is-forecast-to-move-from-northern-ca-over-the-sierra-today/) - From NWS RNO AFD: A rare (for summer), strong jet streak with wind speeds in excess of 100 kts, is forecast to move from Northern California over the Sierra and Northern Nevada today. This will create a 4-8 hour period of dangerous fire weather conditions with widespread wind gusts of 35-45 mph and up to
- [A slow cooling trend is expected into the weekend with some thunder through Wednesday......It will be breezy or windy and cooler this weekend....Very warm again next week....](https://mammothweather.com/2018/07/31/a-slow-cooling-trend-is-expected-into-the-weekend-with-some-thunder-through-wednesday-it-will-be-breezy-or-windy-and-cooler-this-weekend/) - Thursday PM: Red Flag Warning Hoisted Today For Mono County for Saturday: https://forecast.weather.gov/showsigwx.php?warnzone=CAZ073&warncounty=CAC051&firewxzone=CAZ273&local_place1=13%20Miles%20E%20Lee%20Vining%20CA&product1=Red+Flag+Warning&lat=37.939&lon=-118.887 ____________________________________________________________________________________________________________________________________ Wednesday PM Update: Much better air quality in Mammoth today. Last night was good too! Not counting on it every day but very good today! The weekend outlook looks breezy beginning Thursday afternoon into Friday with gusts continuing through the weekend....15
- [Very Warm Weather to continue for the high country as the Continental Subtropical high has found a home over the far southwest.....](https://mammothweather.com/2018/07/26/very-warm-weather-to-continue-for-the-high-country-as-the-continental-subtropical-high-has-found-a-home-over-the-far-southwest/) - High temperatures remained well into the 80s in Mammoth as upper heights at 500MB remained well north of 594DM. It appears that heights will continue very high as the Subtropical Continental high remains pretty much parked over the far west through the end of this month. This raises the question of whether there will be
- [Airmass modifacation underway with an increase of afternoon and evening thunderstorms through the weekend....Saturday afternoon and Sunday look particularly active...](https://mammothweather.com/2018/07/20/airmass-modifacation-underway-with-an-increase-of-afternoon-and-evening-thunderstorms-through-the-weekend-saturday-afternoon-and-sunday-look-particularly-active/) - Saturday AM: Late yesterday there was a series of strong thunderstorms in Mammoth that produced heavy rainfall amounts between .47 and .74 hundreds of an inch within an hour. Heavy runoff occurred and some minor street flooding was observed. Todays convective outlook is still active with showers and thunderstorms once again developing during the afternoon
- [Very Warm Weather returned to the high country Tuesday with Wednesday the peak in the heat....East West Ridge to slide Eastward Thursday with Southeast flow returning for more afternoon and evening thunderstorms.....](https://mammothweather.com/2018/07/18/very-warm-weather-returned-to-the-high-country-tuesday-with-wednesday-the-peak-in-the-heat-east-west-ridge-to-slide-eastward-thursday-with-southeast-flow-returning-for-more-afternoon-and-evening-th/) - Thursday July 19th Update: Very Warm temperatures expected for the high country and Owens Valley next week with possible high temperature records Mid Week.... ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Wednesday Temp Update: Hi Temperature in Mammoth was 88 degrees Wednesday. This was the warmest day of the Summer so far and the climatically warmest temperatures of the year. So
- [A very moist airmass will continue for the Eastern Sierra Friday, with slow drying Saturday through Tuesday with a warming trend....Another surge of monsoon moisture seems in the cards the second half of next week.....](https://mammothweather.com/2018/07/13/a-very-moist-airmass-will-continue-for-the-eastern-sierra-friday-with-slow-drying-saturday-through-tuesday-with-a-warming-trend-another-surge-of-monsoon-moisture-seems-in-the-cards-the-second-half/) - It was a wet afternoon and evening Thursday in Mammoth with moderate to heavy rain in many areas that continued into the night. Mammoth at the Village picked up .32 of an inch of rain while the Mammoth AP picked up .41. Bishop's precipitation was the most noteworthy with precipitation totals of 1.44 inches for
- [The Pattern of Dry Southwest Flow to end Tuesday as Pacific NW trough kicks out....Arizona Monsoon developing now will work SE flow into the high country by Thursday or Friday next week....Showers and Thunderstorms to gradually increase after Mid Week.....](https://mammothweather.com/2018/07/06/the-pattern-of-dry-southwest-flow-to-end-tuesday-as-nw-trough-kicks-out-arizonia-monsoon-developing-and-will-work-se-flow-into-the-high-country-by-thursday-or-friday-next-week-showers-and-thunde/) - Tuesday AM: Forecast remains on track as upper Trof now inland over the Pacific NW, then progresses east today into Wednesday. This Trof has been the suppressant, keeping monsoon moisture to the east and south of Mono County so far this Summer. By tomorrow Wednesday, the gates will open allowing moisture and dynamics to
- [Early Summer Pattern of Dry Weather and Breezy afternoon and evening hours will continue through July 4th with a slight cooling trend....Traditional Summer Pattern with Full-On Monsoon flow including upper dynamics to develop over the Sierra later during the 2nd week of July....](https://mammothweather.com/2018/07/01/early-summer-pattern-of-dry-weather-and-breezy-afternoon-and-evening-hours-will-continue-through-julty-4th-with-a-slight-cooling-trend-traditional-summer-pattern-with-full-on-monsoon-flow-including/) - 9:15 AM July 4th: Breezy weather on tap for this Fourth of July with seasonal temperatures. Expect highs in the mid 70s today and lows in the 40s Gusty SW winds and low humidity in the afternoon and evening hours will create critical fire conditions. Be especially careful with fire. Subtropical ridge in the east
- [Wind Shift from back side of upper trough gives Mammoth Lakes a break from the Smoke from the Lions Fire.....Big warm up is store this weekend then a return to Gusty WSW Winds....](https://mammothweather.com/2018/06/29/wind-shift-from-back-side-of-upper-trough-gives-mammoth-lakes-a-break-from-the-smoke-for-the-lions-fire-big-warm-up-is-store-this-weekend-then-a-return-to-gusty-wsw-winds/) - A Northwest flow aloft was just what the Dr ordered today, as the upper Trof that brought wind and cooling to the region mid-week, lifts out to the NE today. Its back side and NW flow aloft kept smoke confined to the west side of the Sierra this morning. Winds maybe gusty on the west
- [Warmer than Normal Temperatures Likely to Continue through the middle of next week.....Monsoon moisture to remain out of California for the next 7 days....Tropical storm will move up the Baja Coast....May bring moisture into So-Cal later the first week of July...](https://mammothweather.com/2018/06/22/warmer-than-normal-temperatures-likely-to-continue-the-next-week-monsoon-moisture-to-remain-out-of-california-for-the-next-7-days-tropical-storm-will-move-up-the-baja-coast-may-bring-moistur/) - Quick visual smoke update regarding Lion fire Spread of fire was greatly reduced over the past 24 hours The majority of all smoke has been absent this morning and gone from the skys over the town of mammoth. Some light smoke returned this afternoon. It appears that firefighters have really gotten the situation under
- [First heat wave of the year is upon us with highs 10 to 15 degree above normal this weekend...Pattern to remain dry into next week.....](https://mammothweather.com/2018/06/19/first-heat-wave-of-the-year-is-upon-us-with-highs-10-to-15-degree-above-normal-this-weekend-pattern-to-remain-dry-into-next-week/) - Upper Low from the weekend was over Idaho this morning tracking east. Increasing heights with high pressure building into the north will bring very warm temps to the high country through early next week. Last "Climo" freeze at resort levels for Mono County is now behind us. Modified for Mono County AFD From KRNO:
- [Wrapping up the last 10 days of Spring will be EZ for the Weatherman with just warming and cooling a few thunderstorms and some wind to consider.....](https://mammothweather.com/2018/06/11/wrapping-up-the-last-10-days-of-spring-will-be-ez-for-the-weatherman-with-just-warming-and-cooling-a-few-thunderstorms-and-some-wind-to-consider/) - It's the last full week of Spring and the Dweebs are taking a look through the end of this week for any significant weather. The week for the most part will be affected 1st by an upper ridge over the pacific NW bringing dry warmer than normal weather through Wednesday. A cool down follows going
- [Warm-up this weekend will mark the first stretch of 70s in Mammoth this year as Spring comes to a close over the next few weeks and the longest days of the year approach.....](https://mammothweather.com/2018/06/02/warm-up-this-weekend-will-mark-the-first-stretch-of-70s-in-mammoth-this-year-as-spring-comes-to-a-close-over-the-next-few-weeks-and-the-longest-days-of-the-year-approach/) - As we approach the Summer solstice over the next 3 weeks the upper jet will continue to weaken and spend a great deal of time to the north of us. This weekend will be highlighted by high temperatures some 10 degrees above normal with mid to upper 70s expected by Sunday. This upper ridge will
- [Cyclonic Flow continues today over the Great Basin with a slight up-slope component....Thus a few isolated showers are still possible early this week.....Another Trof affects the area Wednesday and Thursday....](https://mammothweather.com/2018/05/28/cyclonic-flow-continues-today-over-the-great-basin-with-a-slight-up-slope-component-thus-a-few-isolated-shower-are-still-possible-early-this-week-another-but-weaker-trof-affects-the-area-wednes/) - Cyclonic flow continues over the region this morning as the associated upper low remains situated over the Great Basin. While the models show only a slight eastward progression of the upper low, areas of unstable air, will continue will rotate around the upper low and cross the Sierra Nevada today. Afternoon clouds and isolated showers
- [Upper Low that brought rains to the region the past 36 hours will move out of the Desert Southwest Today......The next Upper Low will approach Friday.....](https://mammothweather.com/2018/05/22/upper-low-that-brought-rains-to-the-region-the-past-36-hours-will-move-out-of-the-desert-southwest-today-the-next-upper-low-will-approach-friday/) - Friday 8:30 AM Some light rain occurred after midnight last night and .04 was recorded in the rain bucket. Skies were cloudy along the crest and westward this morning with precipitation falling over the Central San Joaquin and Sac Valleys this morning. The upper low was located just off the coast between Monterrey Bay
- [Althrough Mono County Rainfall has been confined to areas north of Mammoth the past two days.....The pattern remains favorable for some showers Friday, Saturday and Sunday afternoon and especially Monday,,,,,](https://mammothweather.com/2018/05/17/althrough-mono-county-rainfall-has-been-confined-to-areas-north-of-mammoth-the-past-to-days-the-pattern-remains-favorable-for-some-showers-saturday-and-especially-monday/) - The closed low that brought heavy rainfall to the Reno area Tuesday was located over Eastern NV Thursday night and moved ENE out of the state by morning. The pattern that originated was classic in that Reno and areas mainly north of Mono County were in the favorable NE quad of the upper low that
- [Small Scale Blocking Pattern will Likely Lock in weak Long Wave Trof over the Great Basin....Chilly unsettled weather the result for the high country this week and possibly next...](https://mammothweather.com/2018/05/13/small-scale-blocking-pattern-likley-lock-in-long-wave-trof-over-the-great-basin-chilly-unsettled-weather-the-reasult-for-the-high-country-this-week-and-possibly-next/) - A blocking pattern is forecasted by both the GFS and ECMWF. 5 Day 500mb means show upper Trof over the Great Basin while the daily's keep Vort centers moving counter clock wise around upper low with NE flow into the Sierra. Showers and possible thunderstorms will most likely be diurnally driven with some nocturnal action
- [It will be warmer and drier Friday with lots of high clouds through the weekend....Sunday looks to be the Breeziest Day...Warmer than normal temps are likley well into next week.](https://mammothweather.com/2018/05/03/it-will-be-warmer-and-drier-friday-with-lots-of-high-clouds-through-the-weekend-sunday-looks-to-be-the-breeziest-day-warmer-than-normal-temps-are-likley-well-into-next-week/) - Latest Guidance this morning continues the trend of drying and warming through Friday. Highs will move well into the 60s over the next two days, with little change in temperatures expected over the weekend. The exception is that Sunday maybe a little cooler. There is a passing short wave to our north on Sunday. The
- [Large Scale Upper Trough to remain over the west the next few days with several short waves keeping unsettled showery weather going into Wednesday....The following weekend will be fair and warm...](https://mammothweather.com/2018/04/29/large-scale-upper-trough-to-remain-over-the-west-the-next-few-days-with-several-short-waves-keeping-unsettled-showery-weather-going-into-wednesday-the-following-weekend-will-be-fair-and-warm/) - Monday AM: A winter weather advisory was issues by the NWS this morning, beginning at 8:00PM tonight into Tuesday AM. 2 to 4 inches of snow is expected in town tonight into Tuesday AM with up to 6 inches over the crest.. _____________________________________ A large-scale upper Trof will remain over the west through Wednesday
- [Warmer than Normal temperatures to Continue this week with Isolated Convection Mid-Week....Upper Trof or Cut-Off Low may Play Havoc with the Fishermen this Weekend....](https://mammothweather.com/2018/04/23/warmer-than-normal-temperatures-to-continue-this-week-with-isolated-convection-mid-week-upper-trof-or-cut-off-low-may-play-havoc-with-the-fishermen-this-weekend/) - An upper ridge will strengthen over the west coast toward mid week increasing heights and temperatures. At the same time, a Trough of low pressure located at 140west Monday AM will become cut-off from the westerlies. Both the Upper Level Ridge and Cut-Off Low will shift east later this week allowing the upper levels to
- [Closed Low on Thursday will keep snow showers going untill the Sunsets Thursday Night...Expect a Rapid Warm Up this weekend setting stage for more Spring Thaw conditions.....Cut Off Low next week will Tease the Sierra with a Spring Time Thunderstorm Pattern....However Timing is unclear...Maybe Mid week or the end of the week....or ????](https://mammothweather.com/2018/04/19/closed-low-on-thursday-will-keep-show-showers-going-until-the-sun-sets-thursday-night-rapid-warm-up-this-weekend-sets-stage-for-more-spring-thaw-conditions-cut-off-low-next-week-will-tease-the-s/) - Short term forecast shows continued snow showers this afternoon with clearing tonight. It will be cold Thursday night with lows in the teens, then highs in the mid 50s on Friday and 60s this weekend. Winds will be light this weekend. From a Weather Predictability point of view, Mid Spring weather patterns are
- [After a warm up the next few days....unsettled weather returns next week with one storm exiting Monday Night and another weaker system exiting Thursday.....Thereafter, the weather pattern is making efforts to transition to a warmer drier pattern......](https://mammothweather.com/2018/04/13/after-a-warm-up-the-next-few-days-unsettled-weather-returns-next-week-with-one-storm-exiting-monday-night-and-another-weaker-system-exiting-thursday-thereafter-the-weather-pattern-is-making-ef/) - Although another round of cold unsettled weather is likely Sunday night into Monday night, and possibly again Wednesday night into Thursday, there are signs that the long-awaited transition to warmer, spring weather over California is beginning to take shape in the not too distant future.. For the time being, the long-range outlook, which is typically
- [New Week Arrives on a Fair Note....Then a Return To Unsettled Weather Mid Week.....No Major Storms on the Horizon this Week....](https://mammothweather.com/2018/04/08/new-week-arrives-on-a-fair-note-then-a-return-to-unsettled-weather-mid-week-no-major-storms-on-the-horizon-this-week/) - Latest guidance favors the European Model which has the most consistent ensemble members and thus "Trumps" the GFS. (No pun intended) The Wednesday night system looks pretty windy, with the potential for light to moderate precipitation. There is another system out there for next Monday. Again the Euro seems to be handling the upper
- [Atmospheric River moves on shore later today...Latest model runs trend Bullseye further north to Tahoe.....Much colder storms expected next week......](https://mammothweather.com/2018/04/05/atmospheric-river-moves-on-shore-later-today-latest-model-runs-trend-bullseye-further-north-to-tahoe-much-colder-storms-expected-next-week/) - Latest Update on the AR this Saturday morning the 7th: The AR will be out of the Mammoth Area between 11:00am and Noon.. A few showers may linger.... No snow is expected in the Town of Mammoth Little if any snow is expected on Mammoth Mt following the system.....Above 9500 feet there may be
- [The Atmospheric River Drums beating stronger now for Friday into Saturday as high PWAT's move toward Hawaii then Central and Northern CA Friday....](https://mammothweather.com/2018/04/01/the-atmospheric-river-drums-beating-stronger-now-for-friday-into-early-saturday-as-high-pwats-move-toward-hawaii-then-central-and-northern-ca-friday/) - Tuesday 4:00PM Stage is set for record or near record strength "AR" for the Central Sierra, "For the Month of April". Rain and very high elevation snowfall will increase both in coverage and intensity Friday into Saturday. PWAT of 1.5 to 2.00 inches forecasted Early Saturday AM adjusted for climatology are some 500% of normal
- [Spring has Sprung w/Warming Trend in full swing; 50s and low 60s possible the next 3 to 5 days....MJO Amping Eastward spells excitment for possible pattern change to wet....](https://mammothweather.com/2018/03/28/spring-has-sprung-w-warming-trend-in-full-swing-50s-and-low-60s-possible-the-next-3-to-5-days-mjo-amping-eastward-spells-excitment-for-possible-pattern-change-to-wet/) - Friday: Models continue trend of focusing main thrust of Precipitation of an approaching "AR" for next Friday over Northern CA and Central CA. Snow levels look very high, at and above 9000 feet. So rain a good bet for the town if the models hold on to that idea for next week, The MJO
- [Current Stormy Pattern winding down as the last shoe to drop comes through Sunday....Associated with below Normal Temps through Monday.....A warming trend mid-week will Lead to beautiful Spring Weather......Miracle March in the Bag......](https://mammothweather.com/2018/03/24/current-stormy-pattern-winding-down-as-the-last-shoe-to-drop-comes-through-sunday-associated-with-below-normal-temps-through-monday-then-a-warming-trend-into-mid-week-miracle-march-in-the-bag/) - A lot of folks have asked me lately what is a "Miracle March". What it is, is a colloquial term not scientific, that relates to a very dry winter followed by a wet March. There are no guidelines for this term and it has nothing to do with ending a drought, although it certainly can
- [Major AR Event to pretty much Lock in a Miracle March for the High Country Mid-Week...Snow then rain then Snow for the Town of Mammoth.....](https://mammothweather.com/2018/03/19/major-ar-event-to-pretty-much-lock-in-miracle-march-for-the-high-country-mid-week-snow-then-rain-then-snow-for-the-town-of-mammoth/) - 9:20am Thursday: Back edge of the AR has moved through the Bay Area and progressing east. As of 8:00AM, Mammoth Pass has picked up 3.5 inches of water EQ with another 3 inches in the bucket expected over the next 24 hours. Colder storm off the coast of the pacific NW is digging SE
- [Storm System Currently moving into high country looks wetter for tonight.....Heavy Snowfall expected Tonight and most of the day Wednesday......Weekend shaping up to be cold but drier now into Monday....More snow possible next week....](https://mammothweather.com/2018/03/13/storm-system-currently-moving-into-high-country-looks-wetter-for-tonight-heavy-snowfall-expected-tonight-and-most-of-the-day-wednesday-weekend-shaping-up-to-be-cold-but-drier-now-into-monday/) - Traveling over the weekend.....will update Monday night..... Platinum Powder Alert" for this Saturday Morning Thursday night....everything on track..... Heaviest snow fall will occur when upper flow back from the WSW Tomorrow afternoon......Eastern Sierra Blizzard.... Storm Warning through 1100AM Saturday. Now the rest of the story.....Significant Atmospheric River possible for next Wednesday.... Wednesday
- [New Long Wave Trough developing over the Eastern Pacific likely to persist for sometime....First system will begin Tuesday then linger into Friday with long wave reloading thereafter....](https://mammothweather.com/2018/03/11/new-longwave-trough-developing-over-the-eastern-pacific-will-likely-persist-for-sometime-first-system-will-begin-tuesday-then-linger-into-friday-with-long-wave-reloading-thereafter/) - Late Sunday Night: It is subtle, however the newer models runs seem to be developing more southerly flow with this first system Tuesday into Wednesday AM as the system is taking on more of a negative tilt. So as a result, there is likely to be more shadowing with less snowfall east of the sierra
- [Fair Weather Ridge will provide warming the next two days with the next weather system taking a trek a bit further north......Weekend looks unsettled and breezy with light snowfall...](https://mammothweather.com/2018/03/06/fair-weather-ridge-will-provide-warming-the-next-two-days-with-the-next-weather-system-taking-a-treck-a-bit-further-north-weekend-looks-unsetteled-and-breezy-with-light-snowfall/) - (Get ready for the storm that will not die) Amounts over a 6 day period beginning Tuesday will range from 2 to 5 feet. The storm will begin on the warm side but will chill through the week.... This is a series of waves attached to a mother low that will park off the
- [The new week is highlighted by a change in pattern leading to more seasonal temperatures as our cold weather gives way to the Subtropical Jet...It will be very breezy over the higher elevations Wednesday and Thursday with the slight chance of some light snowfall Thursday and a better chance Saturday Night.....](https://mammothweather.com/2018/03/04/the-new-week-is-highlighted-by-a-change-in-pattern-to-more-seasonal-temperatures-as-our-cold-weather-gives-way-to-the-subtropical-jet-it-will-be-windy-over-the-higher-elevations-wednesday-with-the-s/) - Monday AM: Only changes this morning to the discussion below is to highlight the potential of "AR" moisture from the subtropical jet later this weekend. There is a trend in the GFS of pushing a portion of this off shore AR further north up into Central CA. At the moment it is too soon to
- [Platinum Powder Alert for Friday and Saturday AM......Storm is highlighted by heavy snow, strong winds and Blizzard conditions Thursday into Friday AM...Storm moves out Saturday leaving Epic conditions Sunday into Monday.....](https://mammothweather.com/2018/02/28/platinum-powder-alert-for-friday-and-saturday-am-storm-is-highlighted-by-heavy-snow-strong-winds-and-blizzard-conditions-thursday-into-friday-am-storm-moves-out-saturday-leaving-epic-condition/) - Platinum Powder Alert for Friday: Between 1 and 2 feet of Platinum Powder (Snow to Water Ratio equal to or greater than 15:1) Wednesday PM Update: Winter Storm Warning in effect from March 1, 04:00 AM PST until March 3, 10:00 AM PST Blizzard Warning in effect from March 1, 10:00 AM PST until March
- [Heavy Snow Showers possible Monday Night into the morning hours.....Major snow pattern setting up for Thursday and Friday followed by snow showery weekend....Platinum Powder Watch for Friday....Winter Just getting started....just in time for Spring!](https://mammothweather.com/2018/02/26/heavy-snow-showard-possible-monday-night-into-the-morning-hours-major-snow-pattern-setting-up-for-thursday-and-friday-followed-by-snow-showery-weekend-winter-just-getting-started-just-in-tim/) - Platinum Powder Watch for Friday...12 inches or more at 15:1 or better....Good possibility for epic weekend for "Platinum Powder." Our weather front brought between 4 and 5 inches of snowfall to Mammoth Mt today. Light fluffy snow! Second part of the storm is currently developing as weather front has pushed through and somewhat fallen apart.
- [Platinum Powder Alert for Friday Morning.....Mammoth Mt Reports 12 to 14 inches of Platinum Powder.....Ratios of at Least 15:1.....Cold Weather to continue with slowly moderating temperatures this weekend.....](https://mammothweather.com/2018/02/23/platinum-powder-alert-for-friday-morning-mammoth-mt-reports-12-to-14-inches-of-platinum-powder-ratios-of-at-least-151-cold-weather-to-continue-with-slowly-moderating-temperatures-this-wee/) - This will be very brief for the lack of time this weekend...... Cold will continue another day then somewhat milder temps this weekend. It will be windy over the crest due to the upper jet and its Front Right exit region favoring Mammoth. A Great Basin Slider will come through Saturday night reinforcing the
- [Chilly Modified Arctic Air Entrenched over Mono County today with reinforcing shots from the north this week....Cold Showery weather to continue with much colder then normal temperatures as a result.....First real signs of the pacific opening up...First Week of March....](https://mammothweather.com/2018/02/19/chilly-modified-arctic-air-entrenched-over-mono-county-today-with-reinforcing-shots-from-the-north-this-week-cold-showery-weather-to-continue-with-much-colder-then-normal-temperatures-as-a-result/) - Thursday 2:36PM update: More Modified Arctic Cold today and with the lack of snow cover in town, the cold is beginning to take its toll on the older condominium projects in the form of frozen pipes. This has been reported to me by several condominiums managers today. This condition is likely to get worse,
- [Arctic Ribbon on the way to bring serious chill to the high country and provide first Platinum Powder for the Season Sunday night and Monday.....Cold weather will be initiated by strong winds Sunday/Sunday Night....Expect Strong Wind Chill Factors Sunday night and especially Monday AM over upper elevations....Well Below Zero.....](https://mammothweather.com/2018/02/17/arctic-ribbon-on-the-way-to-bring-serious-chill-to-the-high-country-and-provide-first-platinum-powder-for-the-season-sunday-night-and-monday-cold-weather-will-be-initiated-by-strong-winds-sunday-s/) - 5:25PM Sunday: Arctic Ribbon coming through now.... In back...very cold air to pour in, all night and through 4:00AM Monday.... Revised 12:15AM Sunday Winds Gusting to 108MPH over the Summit at the moment.... A an Arctic Ribbon will pass through Mammoth by 4:00PM Sunday. The storm system that has been forecasted to moved
- [Chilly Thursday will be followed by moderating temps over the weekend.....Another Cold Trof will Dig into the Great Basin Sunday Night with Light Snow Possible Sunday Night and Monday....](https://mammothweather.com/2018/02/15/chilly-thursday-will-be-followed-by-moderating-temps-over-the-weekend-another-cold-trof-will-dig-into-the-great-basin-sunday-night-with-light-snow-possible-sunday-night-and-monday/) - 12:15PM Thursday It's not often that we get a strong Trof directly linked to the Polar Vortex over Hudson Bay. This actually happens Sunday Night into Monday as "CPK" Continental Polar Air gets pulled out of Central Canada and yanked westward, then SSE ward. It will be cold Monday but not nearly as cold
- [Change in Pattern in Process with Cooling, Windy Periods and Light Snowfall Likely through Tuesday......Further Retrogression Possible Toward Months End....](https://mammothweather.com/2018/02/10/change-in-pattern-in-process-with-cooling-windy-periods-and-light-snowfall-likely-through-tuesday/) - Monday Afternoon 4:15pm It was a cold day today. I almost forgot how it feels when its cold! Highs were in the mid to upper 20s. Mammoth Mt reported 3 to 5 inches of cold dry powder this afternoon. With a little luck maybe we'll double that! Yes, the upslope portion of the storm
- [Changes are beginning to occur in the long wave pattern now with first of several North-South Slider's over CA and Great Basin beginning Monday.....This is a colder pattern with Light Precipitation Possibilities in our future...](https://mammothweather.com/2018/02/08/changes-are-beginning-to-occur-in-the-long-wave-pattern-now-with-first-of-several-north-south-sliders-over-ca-and-great-basin-beginning-monday-this-is-a-colder-pattern-with-light-precipitation-p/) - Friday 11:00AM: No surprise's this morning... Models are consistent with dry cold front Saturday highlighted by wind and cooling. The following "Inside slider' will dig back over the Sierra Monday and spin up off shore. Snow showers with light accumulations are expected Monday into Tuesday with 2 to as much as 6 inches possible over
- [Mid Winter Blues to Continue this Week with Above Normal Temperatues and Light Winds....Slider Type System the end of the week may bring some Cooling and Breeze to the upper elevations....The Dry Stretch is likely to continue though Mid Month....](https://mammothweather.com/2018/02/05/mid-winter-blues-to-continue-this-week-with-above-normal-temperatues-and-light-winds-slider-type-system-the-end-of-the-week-may-bring-some-cooling-and-breeze-to-the-upper-elevations-the-dry-stre/) - Wednesday AM: This is just a quick update on some of the models and the handling of the Sunday night/Monday system. This morning, the GFS has come into line with yesterday mornings Canadian in taking the short wave west more over CA Monday AM. However, The new Canadian is now further East. Obviously more time
- [Central California will continue with its Dry Winter and Punxsutawney Phil has no business forecasting the rest of Winter for California...](https://mammothweather.com/2018/02/01/central-california-will-continue-with-its-dry-winter-and-punxsutawney-phil-has-no-business-forecasting-the-rest-of-winter-for-california/) - Mid Winter Blues continue for the Eastern Sierra Friday the 2nd.... Well folks it Mid-winter! February 2nd just happens to be the day that's in between The Winter Solstice and the Vernal Equinox. I will say that Mammoth Mt has done a phenomenal job keeping the fun in the sport by moving snow around, making
- [Ridging Locked in over the Far West will insure a fair dry week....The Triple Crown of Lunar Eclispes is schedueled for Wednesday Morning over Mammoth Lakes....](https://mammothweather.com/2018/01/29/ridging-locked-in-over-the-far-west-will-insure-a-fair-dry-week-the-triple-crown-of-lunar-eclispes-is-schedueled-for-wednesday-morning-over-mammoth-lakes/) - For you lunar-tics ;-) out there....The Triple Crown for this Astronomical Event is scheduled for this Wednesday AM the 31st. The following link with tell you why this is so special, and worth getting up for earlier than you normally would before going to work that morning. SEE: http://www.newsweek.com/super-blue-blood-moon-lunar-eclipse-how-where-793427 For Mammoth Lakes: https://www.timeanddate.com/eclipse/globe/2018-january-31# Forecast Summery;
- [Mammoth Mountain Reported up to a foot of fresh Powder this afternoon with more bands of showers expected this evening....Expect a fair dry weekend with high clouds and moderating temperatures......](https://mammothweather.com/2018/01/25/mammoth-mountain-reported-up-to-a-foot-of-fresh-powder-this-afternoon-with-more-bands-of-showers-expected-this-evening-expect-a-fair-dry-weekend-with-high-clouds-and-moderating-temperatures/) - Its been a while since a cold trough moved through the sierra from the Eastern Pacific. This time, there was no split and this time a pair of Vort maxes following the main trof axis passage, brought unstable air and snow showers today. This will continue for a time tonight as the flow becomes more
- [Couple of systems headed our way this new week...Best in the group still expected Wednesday Night and Thursday....](https://mammothweather.com/2018/01/21/couple-of-systems-headed-our-way-this-new-week-best-in-the-group-still-expected-wednesday-night-and-thursday/) - Tuesday Morning 8:30 AM After a mild day today with light winds and highs in the mid 40s, the next weather system will bring increasing winds late tonight with wind advisories in effect for the Mono County area beginning at 10:00AM Wednesday through Wednesday night, 10:00PM. Snowfall will begin here in Southern Mono County Wednesday
- [Chilly Storm left 4 to 5 inches on Mammoth Mt....the splitting systems main energy is headed through LA tonight....Next system will trend further north.....Mammoth Mt "may" get simular amounts](https://mammothweather.com/2018/01/19/chilly-storm-left-4-to-5-inches-on-mammoth-mt-the-splitting-systems-main-energy-is-headed-through-la-tonight-next-system-will-trend-further-north-the-mt-may-get-simular-amounts/) - Friday Evening: As always, a disappointment when we need snowfall and you end up with 4 to 5 inches on the hill when a foot is expected. As indicated below, the storms main vort max is headed into Southern Ca tonight. The system split well off shore. The next upstream systems main energy is well
- [Weather to turn cold and windy tonight with snowfall......Light to Moderate amounts expected.....A rather windy period is expected for the next 5 to 7 days.....](https://mammothweather.com/2018/01/18/weather-to-turn-cold-and-windy-tonight-with-snowfall-with-moderate-amounts-expected-a-rather-windy-period-is-expected-for-the-next-5-to-7-days/) - As of 1:40PM, The next weather system that will affect our area has spread precipitation south to the Bay Area. However the band of precip has yet to reach the sierra, north or south. Snowfall projections are now on the low end of the forecast with a foot expected on the sierra crest by Friday
- [Big Weather Changes Coming to the US as the Large Scale Ridge-Trough Pattern Comes to an end....1st in Series of Snowstorms headed for Mammoth later Thursday with main snowfall expected after Midnight Thursday Night.....](https://mammothweather.com/2018/01/14/big-weather-changes-coming-to-the-us-as-the-large-scale-ridge-trough-pattern-comes-to-an-end-1st-in-series-of-snowstorms-headed-for-mammoth-thursday/) - Tuesday the 16th: There were a few snow showers around overnight but nothing measurable. Main effect of this short wave will be the beginnings of a pattern change that will bring cooling, gusty winds over the crest and the flattening and displacement of the upper west coast ridge. Today's highs will be in the mid
- [Storm System Exits Southern California with death and distruction in its wake...High pressure to build over the state in the coming days leading to a fair weekend....Surface cyclogenesis off the coast of Japan next Wednesday suggests a wet following weekend....](https://mammothweather.com/2018/01/10/storm-system-exists-southern-california-with-death-and-distruction-in-its-wake-high-pressure-to-build-over-the-state-in-the-coming-days-leading-to-a-fair-weekend-surface-cyclogenesis-off-the-coas/) - I will begin this morning with the end of my last post with this; Outlook: From January 9th. Although the Dweebs have not seen the latest ECMWF model, the latest 12Z Tuesday GFS has the upper jet moving back into Northern California early next week where it keeps it there for several days. The
- [Storm System decide to pay visit to "Sunny Southern California" dumping heavy rain, while only moderate amounts of snowfall have fallen over the upper elevations of the Eastern Sierra....Mammoth Mt reporting up to 18 inches over the higher elevations this morning......Expect a mostly sunny weekend with possibility of another storm after Mid Week next week....](https://mammothweather.com/2018/01/09/storm-system-decide-to-pay-visit-to-sunny-southern-calfornia-dumping-heavy-rain-while-only-moderate-amounts-have-fallen-over-the-upper-elevations-of-the-eastern-sierra-mammoth-mt-reporting-up-to-18/) - It is always a disappointment when we do not reach winter storm criteria in town, but 18 inches over the upper elevations and possibly more to come today is certainly encouraging! Results; The GFS had it further south and so it was the correct model to follow....Go figure! A difference of 50 to 75 miles
- [While the Eastern Sierra Experiences it first Dusting this Morning....More important changes on the Horizon lead to Weather Optimism for the Month of January...](https://mammothweather.com/2018/01/04/while-the-eastern-sierra-experiences-it-first-dusting-this-morning-more-important-changes-on-the-horizon-lead-to-weather-optimism-for-the-month-of-january/) - Monday 7:00am WSW now in effect note: snow level will rise today to between 8000 and 8500 then come down later this afternoon and tonight. All model simulations have a track of the upper low moving west to east between Santa Barbara and Lax. This is further south than predictions Saturday. Main focus of
- [Subtropical Moisture continues for flow over the region with a wave moving in Wednesday Night....A few inches of snow is possible over the much higher elevations....Another wave will move over the area Friday/Night...this will be a bit colder system with more light snowfall....Best storm on the horizon maybe next Tuesday and Wednesday....](https://mammothweather.com/2018/01/02/subtropical-moisture-continues-for-flow-over-the-region-with-a-wave-moving-in-wednesday-night-a-few-inches-possible-over-the-higher-elevations-another-wave-will-move-over-the-area-friday-night/) - Lots of old-time locals often times remind us that some of the biggest winters can start from very dry falls. History tells us that big winters can start as late as January or February! So keep the faith and the shovels handy! Todays weather guidance still has some light upper elevation snowfall for Wednesday night
- [Considerable High Cloudiness will ring in the New Year.....Upper Ridge will weaken some what this new week as pattern goes into transition ....Mainly Light Precipitation to occur through early Friday....](https://mammothweather.com/2017/12/31/considerable-high-cloudiness-will-ring-in-the-new-year-upper-ridge-will-weaken-some-what-this-new-week-as-pattern-goes-into-transisition-mainly-light-precipitation-to-occur-trough-early-friday/) - New Years day....12:15PM Happy New Year everyone.... Hope its a good one.... The 12Z European Ensemble forecast model was still running with the Deterministic run still showing a pattern change in the offering. QPF continues to be scaled back and that means in general that these storms are weakening as they come in,
- [Fair Weather Ridge to Hold through year end with mild temperatures for the High Country.....As advertized for the past week,  a welcomed major change in the pattern will take place week two as the MJO strengthens over the Indian Ocean.....](https://mammothweather.com/2017/12/29/fair-weather-ridge-to-hold-through-year-ehd-with-mild-temperatures-for-the-high-country-as-advertized-for-the-past-week-a-welcomed-major-change-in-the-pattern-will-take-place-week-two-as-the-mjo/) - Dec 30 10:30AM A Record High temperature was recorded at the Mammoth Ranger Station Friday with a high of 63 degrees. This is the warmest day since 2000 when the previous high was 57. A 6 degree change in the high this time of the year is quite exceptional.... Our west coast ridge is still
- [West Coast Ridge is favored to remain in control this week.....MJO moving back over Indian Ocean has good chance of initiating Pattern Change to -PNA for the far west......](https://mammothweather.com/2017/12/27/upper-west-coast-ridge-is-favored-to-remain-in-control-this-week-mjo-moving-back-over-indian-ocean-has-good-chance-of-initiating-pattern-change-to-pna-for-the-far-west/) - 12-28-17 8:40AM Quick update this morning shows upper west coast ridge holding strong through New Years Day. However confidence is high for the retrogression of the ridge during the 2nd week of January. A strong interseasonal signal points toward an increase in convection off the coast of Africa and east into the Indian Ocean
- [Cold in Wake of chilly NW slider will give way to more seasonal temperatures for the Christmas Holiday Weekend.....Forecast Models continue to tease the weatherman during the week 2 period....](https://mammothweather.com/2017/12/21/cold-in-wake-of-chilly-nw-slider-will-give-way-to-more-seasonal-temperatures-for-the-christmas-holiday-weekend-forecast-models-continue-to-tease-the-weatherman-during-the-week-2-period/) - Friday 11:55PM This is one ugly transition in pattern. Apparently, we are going from one dry pattern to the next. Time for Dan McConnell to start doing his famous snow dance....Backwards...... Friday 22nd Overall pattern is unchanged for the next week with an upper ridge just off the CA coast. Although this pattern will
- [As pattern transition nears....Brutal Cold Still a Possibility before year end......Northwest slider to bring light snowfall Wednesday.....Dweebs watching "week two period" for Model Consensus....Still the possibility of a storm....A cold one....Or a wet one!](https://mammothweather.com/2017/12/17/as-pattern-transition-nears-brutle-cold-still-a-possibility-before-year-end-northwest-slider-to-bring-light-snowfall-wednesday-dweebs-watching-week-two-period-for-model-consensus-st/) - Monday PM: Just a quick comment or two; The new 12Z GFS run is still keeping the short, medium and long-range dry. However, the ECMWF continues to develop a pattern involving a block in the WPO and EPO region that is remarkable. So, I will begin to write about it and explain somewhat, the pattern
- [Temperature Inversion Peaks today into Friday AM along with warmest temps in this pattern Today and Friday.....Upper west coast ridge really flattens Friday night into Saturday for much cooler temps aloft......Major Change in location of Long Wave Trof may bring Brutal Cold to the Eastern Sierra before Christmas....](https://mammothweather.com/2017/12/14/temperature-inversion-peaks-today-into-friday-am-along-with-warmest-temps-in-this-pattern-today-and-friday-upper-west-coast-really-flattens-friday-night-into-saturday-for-much-cooler-temps-aloft/) - December 15th: The general trend of the models are to weaken the west coast ridge in the coming days and bring cooling and wind to the upper elevations. Although the upper ridge does strengthen early next week. It will not be to the point where it has been as there is another shot of cooling
- [Peak of warm up in process with Thursday into Friday AM with highest Freezing levels.....Upper West Coast Ridge will begin discontinuous retrogression next week with some interesting possibilities over the next few weeks.....](https://mammothweather.com/2017/12/12/peak-of-warm-up-in-process-with-thursday-the-day-and-night-with-highest-freezing-levels-upper-west-coast-ridge-will-begin-discontinuous-retrogression-next-week-with-some-interesting-possibilities/) - For the Eastern Sierra, this pattern is still dry for the remaining time of this week, however, there will still be reasons to watch the skies over the next few nights. The Gemini meteors will be flying tonight through Friday night with the peak of the meteor shower Wednesday night into early Thursday morning. I
- [Upper ridge to hold steady this week with some flattening of the ridge next weekend leading to some cooling aloft.... Slow discontinuous retrogression is hinted at by the models the next few weeks.....The Forecast is still dry for a week to two weeks......Anomalous warm waters in the Bering Sea hold hope that long wave ridge may gravitate to that area during weeks 3 and 4.....](https://mammothweather.com/2017/12/10/upper-ridge-to-hold-steady-this-week-with-some-flattening-of-the-ridge-next-weekend-leading-to-some-cooling-aloft-slow-discontinue-retrogression-is-hinted-at-by-the-models-the-next-few-week-th/) - The forecast and outlook are still pretty much straight forward this upcoming week with the dry weather trend holding with strong temperature inversions, due to the persistent west coast ridge. This ridge will actually strengthen Tuesday through Thursday with the freezing level topping out at about 14,000 feet by Thursday afternoon.. Thereafter, a passing short wave
- [Easterly Winds have greatly diminished over the Upper Elevations.....Upper Ridge will hold steady over the region untill about mid-month when cooling will arrive......Pattern Continues dry into the extended....](https://mammothweather.com/2017/12/08/easterly-winds-have-greatly-diminished-over-the-upper-elevations-upper-ridge-will-hold-steady-over-the-region-untill-about-mid-month-when-cooling-will-arrive-pattern-continues-dry-into-the-ex/) - Looking at the models this morning, it is evident that the earlier forecast guidance has been correct in setting up the strong Ridge-Trough pattern over the CONUS this week. This pattern has legs and will persist for some time. It appears to be, that with a moderate La Nina and the QBO in its negative
- [Gusty East Winds will slowly diminish later today with warming aloft later this week and strong temperature inversions expected....The Weather will likey remain dry for a week or two.......](https://mammothweather.com/2017/12/05/gusty-east-winds-aloft-will-slowly-diminish-later-today-with-warming-aloft-and-strong-temperature-inversions-expected-the-weather-will-likey-remain-dry-for-a-week-or-two/) - Thursday December 7th: There is not much to add to the previous discussion other than to emphasize that this pattern is all about the big Trof in the East and the other Trof in the mean north of Hawaii. The Dweebs know that when the big Trof in the east moves out to sea, the
- [Chilly Today with strong Easterly Winds over the crest developing this afternoon.....It will be fair and milder later this week.....Dry weather is expected this week....](https://mammothweather.com/2017/12/04/chilly-today-with-strong-easterly-winds-over-the-crest-developing-this-adfternoon-it-will-be-fair-and-milder-later-this-week-dry-weather-is-expected-this-week/) - Tuesday AM: It is another clear cold morning here in the Eastern Sierra. As the western ridge continues to build over the entire west coast and even up into Canada, a strengthening cold surface high over the Great Basin with a general off shore flow pattern is expected to prevail for several days. Air Quality
- [Chilly Upper Trof Axis has pushed east of the Sierra Now and so Sunny skies are expected Sunday.....What appears to be the last shot of Cold Air will Follow Monday....Then its Ridge City for quite a while....](https://mammothweather.com/2017/12/03/chilly-upper-trof-axis-has-pushed-east-of-the-sierra-now-and-so-sunny-skies-are-expected-sunday-what-appears-to-be-the-last-shot-of-cold-air-will-follow-monday-then-ridge-city-for-for-quite-a-w/) - Today is a blustery day in Mammoth with light snow this morning and currently sunny skies. High temperatures today will be in the mid 30s and gusty west winds will make it feel even colder. Lows tonight are expected to be in the teens. There appears to be one more shot of cold air following
- [Some light snow is possible this weekend....Then big blocking pattern developing with west coast ridge....There is light at the far end of the tunnel...I just hope it's no Mirage](https://mammothweather.com/2017/11/30/some-light-snow-is-possible-this-weekend-then-big-blocking-pattern-developing-with-west-coast-ridge-there-is-light-at-the-far-end-of-the-tunnel-i-just-hope-it-is-no-mirage/) - Friday AM Update: Just has a peak at both the 00Z Friday EC and 06Z GFS: Some interesting deterministic run possibilities.... Both Models continue the trend of the Blocking pattern with ridge in the west. And continuing their trend of the possibility of a bit more moisture for the weekend (Sunday) system for Mono County.
- [Radical Teleconnection Pattern of +PNA...-AO...-NAO...and evenually-EPO pattern setting up across the Western Hemisphere....Arctic to open up for Bitter Cold Outbreak for the East Next Week.....It will be Ridge City for Much of California after this weekend....](https://mammothweather.com/2017/11/29/radical-teleconnection-pattern-of-pna-ao-nao-and-evenually-epo-pattern-setting-up-across-the-western-hemisphere-arctic-to-open-up-for-bitter-cold-outbreak-for-the-east-next-week-it-wil/) - I can just hear it from the Ohio Valley to the east coast from Weather Lovers that like the cold and extreme weather yelling.....The Vortex....Please! However, what is shaping up for the Eastern CONUS is nothing short of a Polar Outbreak on Steroid's during much of at least the first half of December. Once snow
- [Seasonal temperatures with dry weather will continue through the work week with a splitting system showing up for this weekend...Big Amplifacation of the westerlies showing up Week 2......](https://mammothweather.com/2017/11/28/seasonal-temperatures-with-dry-weather-will-continue-through-the-work-week-with-a-splitting-system-showing-up-for-this-weekend-big-amplifacation-of-the-westerlies-showing-up-week-2/) - Tuesday AM: OK....some of my readers comments have not liked the Dweebs pessimism. So let me put this Winter into context. This Winter will offer more of a challenge at distance to the forecaster because of the persistence of the west coast ridge. Persistent long wave trofing in the east that is stationary by wave
- [Chilly Upper Low was exiting the Sierra Crest this mid-morning while wrap around precip began....a few more inches is possible this morning......Short wave ridging is on the move and will build over the top of us tonight for a fair day Tuesday.....Next possible storm this weekend....](https://mammothweather.com/2017/11/27/chilly-upper-low-was-exiting-the-sierra-crest-this-mid-morning-while-wrap-around-precip-began-a-few-more-inches-is-possible-this-morning-short-wave-ridging-is-on-the-move-and-will-build-over-t/) - No surprises this morning as storm worked out pretty much as the Dweebs planned. That is about 12 inches at the Main Lodge and about 18 to 20 inches over the crest. Amounts in town for the most part will be in the 3 to 6 inches range, give or take an inch or so...
- [While Strong High Pressure builds off the west coast today bringing near record warmth, the next system is now looking better for a more favorable track for precipitation into the Northern and Central Sierra....Weather to become very windy for the high country Saturday into Sunday....](https://mammothweather.com/2017/11/22/while-strong-high-pressure-builds-off-the-west-coast-today-brings-near-record-warmth-the-next-system-now-looking-better-for-a-more-favorable-track-into-the-northern-and-central-sierra-weather-to-b/) - Friday 8:30AM Update: Main changes to the forecast for the weekend include the slowing of the storm, more emphasis of precipitation for the Central Sierra now instead of the Northern Sierra. QPF for Yosemite is about 1.5 inches of H2O eq. Mammoth Mountain is store for at least a foot of freshes over all. The
- [High pressure will build over the far desert southwest for a dry stretch of weather for the Central and Eastern Sierra...The following week (Mon-Tues) looks unsettled with the possibility of more snowfall....](https://mammothweather.com/2017/11/19/high-pressure-will-build-over-the-far-desert-southwest-for-a-dry-stretch-of-weather-for-the-central-and-eastern-sierra-the-following-week-looks-unsetteled-with-the-possibility-of-more-snowfall/) - Tuesday AM: Models Weakening southward push of Mondays weather system. Wind, Cooling and showers likely with light accumulations if any.....expected this far south. Monday PM: After a week that will become increasing warmer then normal over the state, the best chance for some snowfall will be next Monday and Tuesday. The system is
- [Moderate to Strong AR to effect the Central Sierra Wednesday night and Thursday with heavy snowfall expected over the higher elevations.....Weekend looks to be Dry...](https://mammothweather.com/2017/11/14/moderate-to-strong-ar-to-effect-the-central-sierra-wednesday-night-and-thursday-with-heavy-snowfall-expected-over-the-higher-elevations-weekend-looks-to-be-dry/) - WEDNESDAY PM UPDATE: Wet portion of storm still on its way with high freezing levels well advertised. Freezing level remain about 9K Thursday Mid Morning through 4:00PM then fall rapidly over night. In a saturated air mass, the snow level is about 500 ft to 1,000 feet below the freezing level. Uptown will have the
- [Small AR expected to impact the Central Sierra Wednesday night pushing south of Mammoth By late afternoon Thursday....Precipitation will begin as early as Wednesday afternoon......Expect a drying trend by Friday Morning then dry through Saturday....](https://mammothweather.com/2017/11/12/small-ar-expected-to-impact-the-central-sierra-beginning-about-400am-thurday-pushing-south-of-mammoth-by-late-afternoon-precipitation-may-begin-as-early-as-wednesday-afternoon-expect-a-drying/) - Tuesday AM: AR has become a moderate to strong AR now with the entrainment of extra moisture from a tropical system.....I will update after 8:30AM this morning the 14th.... ......................:-) Monday Pm...Love posting when stuff is happening! OK...Interesting twist this afternoon! The new 12z EURO is splitting the trof coming in this Sunday.
- [Drier than normal weather pattern for the Southern 2/3 of California likley to continue as upper jet is focused over Northern CA....Expect periods of wind and a chance of snow showers Thursday and again Monday and Monday night as the next upstream's upper Jet is again focused upon Northern CA......](https://mammothweather.com/2017/11/08/drier-than-normal-weather-pattern-for-the-southern-23-of-california-likley-to-continue-as-upper-jet-is-focused-over-northern-ca-expect-periods-of-wind-and-a-chance-of-snow-showers-thursday-and-aga/) - The Weather over the far west is highlighted by the polar jet located over Northern California. Although there has been plenty of blocking near the Bering Sea the past week, the flow coming off Asia has been split to weakly diffluent at times. West coast weather system's have been quite progressive with the upper jet
- [Main Branch of Upper Jet to favor the Northern Sierra this week with several systems headed for Northern and Central CA....Expect colder than normal temps....Breezy periods,  light to moderate amounts the next 7 to 10 days....](https://mammothweather.com/2017/11/05/main-branch-to-favor-northern-sierra-this-week-with-several-systems-headed-for-northern-and-central-ca-expect-colder-than-normal-temps-breezy-periods-light-to-moderate-amounts-the-next-7-to-10/) - Fair weather will redevelop tonight and continue for the next few days... Mammoth Mt reported 1 to 3 inches total with the Town of Mammoth getting a dusting. It is cold and breezy! Highs in the upper 30s today. Next upstream system will most benefit the Northern Sierra again with again light amounts expected for
- [Cold Blustery weather expected this weekend with light amounts of snowfall expected for the Towns of Mammoth and June.....Pattern very disorganized across the Eastern Pacific.....Additional opportunities for snowfall later next week....](https://mammothweather.com/2017/11/03/cold-blustry-weather-expected-this-weekend-with-light-amounts-of-snowfall-expected-for-the-towns-of-mammth-and-june-pattern-very-disorganized-across-the-eastern-pacific-additional-opportunitie/) - WX pattern across the Eastern Pacific remains very disorganized with northern stream energy more progressive leaving southern stream out of phase. End result is a weakening of the dynamics needed for meaningful precipitation as the significant upper jet is to our north and southern branch upper jet develops over head later Saturday. This was another
- [A last day spike in high temps will occur today then a cooling trend through early next week....Snowfall is expected beginning later Friday for the upper elevations with the snow level lowering throughout the weekend......Heavy snowfall is expected later Saturday and Saturday night with Winter Storm Conditions....Storm Door to remain open for at least another week.......](https://mammothweather.com/2017/11/01/a-last-day-spike-in-high-temps-will-occur-today-then-a-cooling-trend-theough-eaarly-nexxt-week-snowfall-is-expected-beginning-later-friday-for-the-upper-elevations-with-the-snow-level-lowering-thro/) - 11/2/2017 Thursday AM update: European Model wins out! The European model's exceptional physic's has been consistent in indicating a much less AR for the Central and Southern Sierra from the beginning. The GFS has now come in line with the Euro and diminishes the subtropical fetch from the SW into the Central and Southern Sierra.
- [Beautiful mid-afternoon Mammatus Clouds off to the NNW....Earlier, pleanty of Virga to our West....Upper Flow at 500MB out of the north now......Weekend Storm still in forecast with strong support from all global models...Colder weather expected the following week....](https://mammothweather.com/2017/10/30/beautiful-mid-afternoon-mammatus-clouds-off-to-the-nnw-earlier-pleanty-of-virga-to-our-west-upper-flow-at-500mb-out-of-the-north-now-weekend-storm-still-in-forecast-with-strong-support-fro/) - All Hallows Eve 2:30PM update on Models... (Absolutely no help!! Euro is still under an inch of PWAT with a relatively short-term wet event with the GFS now showing a more protracted AR event lasting for 2 days! So the EC is now less exciting and the GFS more exciting! Kind of a spooky
- [Record breaking October heat wave to slowly break after mid-week with important changes ahead for the first week of November....](https://mammothweather.com/2017/10/24/record-breaking-october-heat-wave-to-slowly-break-after-mid-week-with-important-changes-ahead-for-the-first-week-of-november/) - OCT 30th.... Update later today on the weekend storm and beyond......:-) October 26th: Comments: Very strong Blocking signature still evident in both -EPO and -WPO teleconnection, Especially the -EPO. This is profound! Main Message is still for the possibility of a storm cycle beginning during at some point the first week of November.....
- [Fast Moving upper Trof will scoot through during the mornings hours Friday....Big warm up in store for California Sunday through Wednesday with record or near record highs possible.....MJO expected to remain strong into next week.....Retrogression of long wave expected week two.....](https://mammothweather.com/2017/10/19/fast-moving-upper-trof-will-scoot-through-during-the-mornings-hours-friday-big-warm-up-in-store-for-california-sunday-through-wednesday-with-record-or-near-record-highs-possible-mjo-expected-to/) - Lots going on hemispherically weather wise, even though we are expecting only upper elevation snow showers Friday morning. The trof will be coming in to antecedent conditions that are fairly warm and so expect a lot of Wind later tonight and into Friday morning. The Dweebs expect between 10 and 15 degree of cooling by
- [Weather Pattern for Thursday Friday no longer impressive as Northern and Southern Streams failing to couple......Thus AR event becoming less likley for Thursday night and Friday......Strong PNA pattern setting up the following week...](https://mammothweather.com/2017/10/16/weather-pattern-for-thursday-friday-no-longer-impressive-as-northern-and-southern-streams-failing-to-couple-thus-ar-event-becoming-less-likley-for-thursday-night-and-friday-strong-pna-patter/) - 10/18/2017 California Rivers Forecast Center is showing between .05 to .10 of an inch of qpf between Huntington Lakes and Yosemite. Pretty Pathetic....So possibly an inch or two in the Bowls above 10K and some snow shower's in town by Mid Day Friday. Thereafter....Full On PNA teleconnection Pattern setting up over the Eastern Pacific according
- [Cooler Saturday then a warm up into mid-week......October 20th weather system has more support from global models now and may bring 1st good shot of snowfall to the high country prior to next weekend......More thoughts about this winter....](https://mammothweather.com/2017/10/14/cooler-saturday-then-a-warm-up-into-mid-week-october-20th-weather-system-has-more-support-from-global-models-now-and-may-bring-1st-good-shot-of-snowfall-to-the-high-country-prior-to-next-weekend/) - Although it will be a cooler day today, high pressure will build over the Eastern Sierra Sunday into Monday for a couple of very nice fall days. High temperatures will reach well into the 60s. The big news this morning is that the European and GFS models are coming into more agreement (With timing differences)
- [Periods of warming and cooling expected for the next two weeks....overall pattern for the Central Sierra is dry with cooler than normal temps....MJO flaring over Maritime Continent likley to bring important changes to west coast weather next week...](https://mammothweather.com/2017/10/10/periods-of-warming-and-cooling-expected-for-the-next-two-weeks-overall-pattern-for-the-central-sierra-is-dry-with-cooler-than-normal-temps/) - Wednesday AM 10/11/2017 After an exceptionally long quiet period for Tropical Storm activity over the Western Pacific, a strengthening MJO over the Maritime Continent (Phase 5 of the RIMM index) promises to bring a return of Typhoon action for the Western Pacific in the coming 2 weeks or the 2nd half of October. This is
- [Fair Warm Weekend ahead then NW Slider Sunday night bringing breeze.....Cooling and some cloudiness....It will be a dry 5 day period ahead.....](https://mammothweather.com/2017/10/05/fair-warm-weekend-ahead-then-nw-slider-sunday-night-bringing-breeze-cooling-and-some-cloudiness-it-will-be-a-dry-5-day-period-ahead/) - High pressure will build along the coast the next few days bringing a good warm up over our region. Temperatures are likely to reach near the 70 degree mark at resort levels Saturday, however night time lows will still dip into the 20s and 30s. Light winds are expected through Saturday. The pattern will change
- [Another NW Digging Trough will bring wind and cooling....Possibly flurries or light snow showers for Tuesday.....Overnight lows headed for the lows 20s once again...](https://mammothweather.com/2017/09/30/another-nw-digging-trough-will-bring-wind-and-cooling-possibly-flurries-or-light-snow-showers-for-tuesday-overnight-lows-headed-for-the-lows-20s-once-again/) - Monday afternoon: Last 12z and 18z Monday modeling continues the trend of more energy swinging off shore then over the sierra, (over water trajectory) to the point that its hard to ignore the possibility of snow showers Tuesday and into the evening. Not a big deal but with most forecasters not putting anything other then
- [Beautiful week shaping up with light north breezes for the first half and temperatures becoming warmer than normal....Week 2 looks not as warm with breezy weather at times and only a slight chance of any showers...](https://mammothweather.com/2017/09/25/beautiful-week-shaping-up-with-light-north-breezes-for-the-first-half-and-temperatures-becoming-warmer-than-normal-week-2-looks-not-as-warm-with-breezy-weather-at-times-and-only-a-slight-chance-of/) - Thursday AM: Not much change in the weekend outlook with breezy weather developing for Friday night into Saturday over the upper elevations. Little temperature change this weekend with highs in the mid 60s. Forecast models and ensembles of both EC and GFS are leaning toward cooler weather the first half of next week with periods
- [Summer to wrap-up more like fall as large scale upper Trof desends upon the west....Much cooler temperatures expected by Thursday and Friday with light snow showers a possibility...](https://mammothweather.com/2017/09/16/summer-to-wrap-up-more-like-fall-as-large-scale-upper-trof-desends-upon-the-west-much-cooler-temperatures-expected-by-thursday-and-friday-with-light-snow-showers-a-possibility/) - Wednesday AM UPDATE: Latest guidance on the timing of the precipitation has moved up a bit. Light rain is likely in town after midnight tonight with rain turning to snow after about 5:00AM. However, the bulk of the precipitation will be over before the rain turns to snow in town. Amounts of 5 inches still
- [Fall Pattern shaping up as we say goodbye to the Summer Ridge....Upper Low ejects out Wednesday as the arrivel of the first Fall trof comes through Thursday into Friday......Next stronger Trof may give first dusting over Sierra next week....](https://mammothweather.com/2017/09/13/fall-pattern-shaping-up-as-we-say-good-by-to-the-summer-ridge-upper-low-ejects-out-wednesday-as-the-arrivel-of-the-first-fall-trof-comes-through-thursday-into-friday-next-stronger-trof-may-giv/) - Yesterdays thunderstorms brought some nice rains during the afternoon. The two reporting stations in Mammoth indicated between .14 and .19 of an inch. There was small hail as well. The upper level low is getting the boot inland today as the first Fall Trof makes its way through Central CA at 18Z Thursday. Through the
- [Old Closed low is drifting north now and will shift east Tuesday through Wednesday Night....Expect an increase of showers and thunderstorms Tuesday afternoon into Wednesday night....Current pattern to transition toward Fall....](https://mammothweather.com/2017/09/11/old-closed-low-is-drifting-north-now-and-will-shift-east-tuesday-night-through-wednesday-night-expect-an-increase-of-showers-ands-thunderstorms-tuesday-afternoon-into-wednesday/) - A closed low that has been off shore now for over a week is currently making its way northward toward the Central CA coast. A pattern shift with a fall like trof dropping out of BC, Canada is drawing it northward. This closed low will have plenty of upper divergence and surface deformation for showers
- [First day of meteorological fall will continue with the trend of above normal temperature’s.....High Humidity to our south will work northward for better chance of warm rains next week….Winter of 2018 looks likely to be very different than 2017](https://mammothweather.com/2017/09/01/first-day-of-meteorological-fall-will-continue-the-trend-of-above-normal-temperatures-high-humidity-to-our-south-will-work-northward-for-better-chance-of-warm-rains-next-week-win/) - Sky conditions cleared out nicely over night and as a result, lows dropped down into the 40s this morning. Upper level winds have become easterly as an egg shaped upper high is currently progressing east over Northern CA. This upper high will become northwest-southeast orientated and allow moisture that is currently over Baja from TS
- [As subtropical moisture moves out....The heat is on this weekend with record highs in jeopardy by early next week.....Long period of above normal temperatures expected with the chance of some thunder developing over the Labor Day Holiday...](https://mammothweather.com/2017/08/24/as-subtropical-moisture-moves-out-the-heat-is-on-this-weekend-with-record-highs-in-jeopardy-by-early-next-week-long-period-of-above-normal-temperatures-expected-with-the-chance-of-some-thunder/) - Our weather pattern will transit to more of a late July and early August weather pattern with 500MB heights becoming quite high over the Great Basin and California. 500mb-1000mb thicknesses are expected by the GFS to reach low 580s over Eastern CA by late this weekend into the early part of next week. This will
- [Weakening Upper trof remains over the inter-mountain west with back side over California.....Weak Low pressure at 700MB will provide marginal instability to the sierra for a few isolated thunderstoms the next few days....Weather may become a bit more active over the weekend.....](https://mammothweather.com/2017/08/15/weakening-upper-trof-remains-over-the-inter-mountain-west-with-back-side-over-california-weak-low-pressure-at-700mb-will-provide-margional-instability-to-the-sierra-for-a-few-isolated-thrunderstom/) - Very light flow remains overs the Central Sierra this evening with a very weak low pressure circulation located over West Central CA at 700MB. There were plenty of high clouds today. However, little in the way of air mass modification. Looking at the Tuesday 18Z GFS 0.5 Degree Model Output, , there appears to be
- [Fall like trof is a reminder that Meteorological Fall is only two weeks away......Coolest Temperatures of the Summer Monday will give way to a warm up beginning Thursday into the following weekend..](https://mammothweather.com/2017/08/14/fall-like-trof-is-a-reminder-that-meteorological-fall-is-only-two-weeks-away-coolest-temperatures-of-the-summer-monday-will-give-way-to-a-warm-up-beginning-thursday-into-the-following-weekend/) - It's a cool cloudy day today in Southern Mono County as a fall like Trof descends through the county....The Trof will be dry. Clearing skies will occur tonight.....Highs today in Mammoth will be in the 60s then low 70s Tuesday and upper 70s by Thursday. Weekend will be fair with highs be near 80 degrees.
- [More seasonal weather returns for Mammoth as drier air works its way into the sierra.....Isolated storms still possible through Wendesday then dry warm weather expected for the weekend...](https://mammothweather.com/2017/08/07/more-seasonal-weather-returns-for-mammoth-as-drier-air-works-its-way-into-the-sierra-isolated-storms-still-possible-through-wendesday-then-dry-warm-weather-expected-for-the-weekend/) - Our air mass dried out Sunday after several days of rain. Low pressure over Northern CA will keep a mainly dry SW flow aloft over the Eastern Sierra with only isolated showers and possible Thunderstorms through Wednesday during the late afternoon and early evening hours. Daytime highs are season now with temperatures in the mid
- [Weak Low Pressure West of Santa Barbara and upper ridge of high pressure over west NV Through Northern CA is Transporting Monsoon Moisture Northward through Central CA.....Increasing potential of rain this weekend....](https://mammothweather.com/2017/08/03/weak-low-pressure-west-of-santa-barbara-and-upper-ridge-of-high-pressure-over-west-nv-through-northern-ca-is-transporting-monsoon-moisture-northward-through-central-ca-increasing-potential-of-rain/) - The interaction between the upper low off shore and deep subtropical moisture will increase dynamics this weekend and the threat of wetting thunderstorm's across the Mono County area, mainly Friday through Sunday AM. This mornings guidance showed a VT max or easterly wave coming out of AZ into SE CA. Showers and thunderstorm's were developing with
- [High Pressure Aloft is cranking tonight with heights of 597DM over NW Nevada...Rare Easterly flow has developed with isolated storms moving east to west......SE flow develops Thursday as airmass modifacation continues....Moderate Monsoonal flow develops w/Increasing dynamics for Scattered Thunderstorms Thursday and Friday....](https://mammothweather.com/2017/08/01/high-pressure-aloft-is-cranking-tonight-with-heights-of-597dm-over-nw-nevada-rare-easterly-flow-has-developed-with-isolated-storms-moving-east-to-west-se-flow-develops-thursday-as-airmass-modif/) - Showers and thunderstorms have been mainly isolated the past few days. The Atmosphere has for the most part been capped, so showers are occurring later in the day. Tomorrow Tuesday and Wednesday the upper high will reach its peak intensity over Northern CA and Nevada with resort levels reaching its highs of the Summer. The
- [Mid Summer has passed with August the last remaining month of "Meteorological Summer".....](https://mammothweather.com/2017/07/26/mid-summer-has-passed-with-august-the-last-remaining-month-of-meteorological-summer/) - So far, as the Dweebs earlier forecasted, our summer has been pretty void of strong thunderstorms here in Mammoth Lakes. We have been for the most part, void of the wide spread heavy rains that give our area about an inch of precipitation during the Summer months. The idea was, back in May, that additional
- [Aerial coverage of Thunderstorms will increase this weekend as a weak southerly flow brings an increase in high level moisture...Expect a drying trend early next week...Then more Thunder after mid-week.....](https://mammothweather.com/2017/07/13/aerial-coverage-of-thunderstorms-will-increase-this-weekend-as-a-weak-southerly-flow-brings-an-increase-in-high-level-moisture-expect-a-drying-trend-early-next-week-then-more-thunder-after-mid-wee/) - Towering cumulous developed mid to late morning over Mammoth Lakes as dew points increased. Thunderstorms developed later this afternoon mainly east of highway 395 with a particularly strong cell near Mono Lake at 6:00pm Thursday evening. Expect a repeat again Friday. High temps will continue in the low 80s then mid 80s Saturday. As we
- [Waiting for the Monsoon!.....Highest Temperatures of the Summer for the next 10 days....Prior to Monsoon Push.....High Temps in Mammoth in the 80s now with Airmass Modifacation and Moistening expected by Weeks End....Only high based isolated storms expected this week....](https://mammothweather.com/2017/07/09/waiting-for-the-monsoon-highest-temperatures-of-the-summer-for-the-next-10-days-prior-to-monsoon-push-high-temps-in-mammoth-in-the-80s-now-with-airmass-modifacation-and-moistening-expected/) - High temperatures in Mammoth reached 86 degrees on Saturday with a slight weakening of the upper high expected the next few days...It was a very mild night as well with early morning lows in the upper 50s Sunday morning. Breezes have been light over all. Forecast Models week 1 and 2: What I see for
- [Seasonal Temperatutres return this week as the strong upper high gives way to troughing in the Pacific Northwest.....There will be a slight uptick in temperatures this weekend...](https://mammothweather.com/2017/06/26/seasonal-temperatutres-return-this-week-as-the-strong-upper-high-gives-way-to-troughing-in-the-pacific-northwest-there-will-be-a-slight-uptick-in-temperatures-this-weekend/) - Wednesday AM: One more day of seasonal temperatures for the Mono County area then a warming trend occurs Thursday into Friday as the current westerly flow aloft shifts east and higher pressure aloft builds in from the south. The ridge is weakened by a weak trof that moves through Saturday and Sunday with little change
- [Summer weather in full swing in the high country with mid 80s....Isolated showers and thunderstorms expected through Sunday.....Next week will begin breezy with highs cooling to the upper 70s...](https://mammothweather.com/2017/06/22/summer-weather-in-full-swing-in-the-high-country-with-mid-80s-isolated-showers-and-thunderstorms-expected-through-sunday-next-week-will-begin-breezy-with-highs-cooling-to-the-upper-70s/) - It's been very warm for this time of the year in Mammoth Lakes. We literally went from spring weather to mid summer weather over night! The pattern looks pretty stable through the weekend with isolated thunderstorms and highs in the mid to upper 80s. Lows will continue in the 50s. Weather synopses shows a subtropical
- [The Heat is On....Summer Pattern Transition Underway....Upper Divergence expected Sunday with a Chance of Thunder as a Weak Upper Disturbance Moves Through Sunday.....High temperature records in Jeopardy early next week.....](https://mammothweather.com/2017/06/14/waiting-for-the-heat-summer-pattern-transition-underway-upper-divergence-expected-sunday-with-a-chance-of-thunder-as-a-weak-upper-disturbance-moves-through/) - Saturday 6-17-17 Quick update shows near record to record heat over the next 5 days over Eastern CA. Mammoth Lakes will enjoy beautiful warm days with highs in the 80s through next Thursday. Lows in the low to mid 50s. The cool down expected for the next weekend will be much less then expected. Expect
- [Winters Last Gasp Underway as Cold Upper Low Churns off the Coast of Washington St......Some light snowfall possible over Central Sierra Sunday PM.....Warm up expected next week as the Spring Shifts to Summer Weather.....50th Annual Motocross to be Hot!](https://mammothweather.com/2017/06/09/winters-last-gasp-underway-as-cold-upper-low-churns-off-the-coast-of-washington-st-some-light-snowfall-possible-over-central-sierra-sunday-evening-warm-up-expected-next-week-as-the-spring-shi/) - Congrats to the Class of 2017! A deep for June, upper low center of 538DM at 500MB was west of Vancouver Island early this morning., with the main upper jet, West-East across Northern California. Winds over the crest are strong, gusting to 90 MPH out of the WSW. As the upper jet remains stationary,
- [Above normal temperatures will continue through mid-week before a strong dry cold front moves in Thursday into Friday....Cool Trof to persist into the upcoming Weekend with Below Normal temperatures Expected](https://mammothweather.com/2017/06/06/above-normal-temperatures-will-continue-through-mid-week-before-a-strong-dry-cold-front-moves-in-thursday-into-friday-cool-trof-to-persist-into-the-upcoming-weekend-with-below-normal-temperatures-e/) - Above normal temperatures along with fast moving rivers and creeks will continues through Mid Week while another cool late spring Trof approaches. Daytime highs, now in the mid 70s in Mammoth and over night lows in the 40s will give way to highs near 60 by Saturday with over night lows in the upper 20s
- [Beautiful warm Late Spring Weather continues into Tuesday....Then breezy and cooler Wednesday followed by Warmer Weather Thursday into the following weekend...No Important weather changes ahead...](https://mammothweather.com/2017/05/28/beautiful-warm-late-spring-weather-continues-into-tuesday-then-breezy-and-cooler-wednesday-followed-by-warmer-weather-thursday-into-the-following-weekend-no-important-weather-changes-ahead/) - The spring runoff continues in full swing with High pressure aloft bringing above normal temps. This will likely continue into Tuesday with dry warm weather. High temperatures will remain above normal with highs in the 70s. Lows will continue in the 30s. It will be partly cloudy Wednesday with some cooling as a dry trough
- [Above normal temperatures have Spring run off in full swing....Upper high over the far west continues to build through mid-week then weakens and redevelops further west allowing a cool down to near normal temperatures in the high country over the holiday weekend and beyond.....](https://mammothweather.com/2017/05/22/above-normal-temperatures-have-run-off-in-full-swing-upper-high-over-the-far-west-continues-to-build-through-mid-week-then-weakens-and-redevelops-further-west-allowing-a-cool-down-to-near-normal-te/) - The High Country run off from our record-breaking winter is in full swing this week. Main stem rivers to the north will flood pasture land over areas of Western Nevada. Upper ridge now building north will begin to weaken this Thursday in response to retrogression of the long wave pattern prior to the holiday weekend.
- [Last of the Eastern Pacific Upper Trofs has kicked out to the Desert Southwest with one more inland slider headed southeast today......Warmer weather on the way with beautiful weekened expected.](https://mammothweather.com/2017/05/16/last-of-the-eastern-pacific-upper-trofs-has-kicked-out-to-the-desert-southwest-with-one-more-inland-slider-headed-southeast-today-warmer-weather-on-the-way-with-beautiful-weekened-expected/) - It was a chilly day in Mammoth Monday with an inch or two of snowfall into town and a few inches over the upper elevations. The Split Trof that spun up a closed low took its time moving through Southern CA Monday. It brought between 6 to 10 inches of snow to the Southern Sierra
- [Active Weather Pattern returns as Cut Off Low Season Begins.....Approaching Upper Trough cuts off this weekend to our south, bringing upper divergence and storminess into early next week.....](https://mammothweather.com/2017/05/05/active-weather-pattern-returns-as-cut-off-low-season-begins-approaching-upper-trough-cuts-off-this-weekend-to-our-south-bringing-upper-divergence-and-storminess-into-early-next-week/) - It's Cinco de Mayo and Cut-off low season has finally begun. Current upper ridge that brought low 70s to Mammoth and 90 to Bishop on Thursday has shifted east to the Rockies. This is a full latitude ridge that extend from Northern Mexico to Canada. To our northwest is what appears to be the first is
- [As the Fishing Opener has come to a close......Warm Sunny Days are here to stay...At least through the middle of this week....A change in the pattern highlighted by a developing "Cut-Off" low will bring the chance of showers and thunderstorms, with the chance of showers beginning as early as this Thursday through the weekend and beyond.](https://mammothweather.com/2017/04/30/as-the-fishing-opener-has-come-to-a-close-warm-sunny-days-are-here-to-stay-at-least-through-the-middle-of-this-week-a-change-in-the-pattern-highlighted-by-a-developing-cut-off-low-will-b/) - Its been a beautiful fishing opener, with light breezes over the lower elevations and bright sunny days. Temps on Sunday topped out in the low 60s while at Crowley Lake, it hit 70 degrees on Sunday. The upper ridge off shore will actually build into California late Tuesday into Wednesday, then shifts east into Nevada Thursday.
- [Blustery Northwest Jet will keep weather unsettled this week with cool windy showery weather.......Warm-up expected by the end of the weekend....Longer range shows a nice warm period beginning the first week of May....](https://mammothweather.com/2017/04/24/blustery-northwest-jet-will-keep-weather-unsettled-this-week-with-cool-windy-showery-weather-warm-up-expected-by-the-end-of-the-weekend-longer-range-shows-a-nice-warm-period-beginning-the-fir/) - For the Dweebs, this is my least favorite time of the year. It is the transition season between Spring and Summer with the northwest jet prolonged through Northern and Central CA. The Jet is tilted NW/SE as a long wave upper high inside of 140 west is too far off shore to bring warm temperatures
- [Atmospheric River in process ending Tuesday afternoon by 5:00PM....Then on and off showery weather into Thursday followed by a very warm fair weekend.....](https://mammothweather.com/2017/04/17/15628/) - 4/19/2017 Update: Our Atmospheric River shifted south late yesterday, leaving 2.17 inches of water in the Rain/Snow melt tip bucket this morning. Mammoth Pass picked up another 4.00+ inches of water and Mammoth Mt reports a storm total of 18 to 26 inches of fresh snowfall. A big story this morning is that Mammoth
- [Unsettled Weather Pattern To Continue this Week....Ramping up next week with "Potential" for AR....](https://mammothweather.com/2017/04/11/unsettled-weather-pattern-to-continue-this-week/) - Snowfall Forecast for the Wednesday Night Thursday system: 2 to 4 inches in Town with 4 to 8 inches over Mammoth Mt Best Accumulations will occur by early afternoon Thursday. Light accumulations through Thursday night with snow showers. *Climate Forecast System Shows potential for significant "AR" next week While European Model forecasts another 4 inches of
- [Wet and Wild Sierra storm moves out of the high country this afternoon leaving another 3.5 to 4.5 feet on Mammoth Mt.  AK Block remains in -EPO mode so more storms on the way.....](https://mammothweather.com/2017/04/08/wet-and-wild-sierra-storm-moves-out-of-the-high-counter-this-afternoon-leaving-another-3-5-to-4-5-feet-on-mammoth-mt-ak-block-remains-in-epo-mode-so-more-storms-on-the-way/) - The Calendar says its April, but the weather says its March. Another 4 to 5 inches of water fell on Mammoth Pass; over 4 feet of fresh snow over the Mammoth Crest. Today Saturday is a day where the last gasps of unstable air, ahead of the upper trof axis will come through this afternoon. This evening the
- [Major April Storm headed our way for the weekend.....Pattern may continue for a week to two weeks... (-EPO) then (-WPO)Teleconnection](https://mammothweather.com/2017/04/04/major-april-storm-headed-our-way-for-the-weekend-pattern-may-continue-for-a-week-to-two/) - 4/7/2017 Storms Stats: As of 10:30am 17 inches at Mammoth Weather.com 8200 feet 22 inches at Main Lodge w/ 3.21 inches of water (pretty wet)! Forecast is for another 1 to 2 feet by Saturday afternoon at the 8000 foot level and 2 to 3 feet over the crest Sunday look like a Blue Bird Day. Next
- [Winter of 1969 April 1st record Broken.....No fooling.....Northwest slider to bring wind.....Light snow and cold temperatures to the Eastern Sierra....The weekend will be warmer with light breezes.....Major Change to an Active Pattern returing late next week with an AR potential.](https://mammothweather.com/2017/03/30/northwest-slider-to-bring-wind-light-snow-and-cold-temperatures-to-the-eastern-sierra-the-weekend-will-be-warmer-with-light-breezes-major-change-to-an-active-pattern-returing-late-next-wee/) - Latest update from DWP shows the Winter of 1969 record up on Mammoth Pass broken with 88.00 inches of water through March 29th, eclipsing the old record of 86.5 inches....Although this past storm that dropped light amounts has not been tallied yet, the record has already been broken.... The Manuel Survey will be taken possibly today or this
- [Spring Storms Bring Clouds....Wind and a Little Snow......It looks like the Mammoth Pass April 1st Record may be broken....](https://mammothweather.com/2017/03/27/spring-storms-bring-clouds-wind-and-a-little-snow-it-looks-like-the-mammoth-pass-april-1st-record-may-be-broken/) - First of all I would like to thank all of those that have supported the "Weather Letter" this winter. Whether or not I do a weather letter next winter, I will still keep my blog going regardless. I will update it this Summer and Fall as well. It is an outlet for my passion of
- [Winter to go out like a Lamb while Spring Roars in Like a Lion!....Three Important Storms on the way into Week 2...](https://mammothweather.com/2017/03/19/winter-to-go-out-like-a-lamb-while-spring-roars-in-like-a-lion-three-important-storms-on-the-way-into-week-2/) - After a two-week break from the record snowfalls of January and February and early March, folks in Southern California and Mammoth I hear, are ready for more snowfall. We are still several inches of water EQ, from the April 1st Mammoth Pass record..... There is new snow storage now, as the few weeks of fair weather has
- [One more spring like day today then variable cloudiness with cooler temps on the way....Transition to an active pattern late in the weekend, with active pattern the following week....](https://mammothweather.com/2017/03/14/one-more-spring-like-day-today-then-variable-cloudiness-with-cooler-temps-on-the-way-transition-to-an-active-pattern-late-in-the-weekend-with-active-pattern-the-following-week/) - All the details will be in my weather letter Thursday morning....However, get ready for more snowfall next week as the East Asian jet extends into California, making a winter encore, just in time for spring!! To Subscribe: http://data.mammothweather.com/landing/
- [ Fabulous Weekend Coming Up!  Storms in our future.....](https://mammothweather.com/2017/03/09/fabulous-weekend-coming-up-storms-in-our-future/) - Mammoth Weather has turned quite mild over the past few days and is likely to remain that way into the foreseeable future. Skiing, boarding and X-Country skiing is fabulous. Weather pattern are always changing. I will have all the weather details including when the next series of storms may arrive, in my weather letter, released as late as Monday
- [Mild Today and Friday then Colder and Windy Saturday with Snow Sunday.....AR event not in the cards for Central California anytime soon....](https://mammothweather.com/2017/03/02/mild-today-and-friday-then-colder-and-windy-saturday-and-sunday-ar-event-not-in-the-cards-for-central-california-anytime-soon/) - March 3rd.... I will have a special inter seasonal and season outlook emailed today for my subscribers.... To Subscribe: http://data.mammothweather.com/landing/ For past Weather Letter issues, click here.... http://us14.campaign-archive1.com/home/?u=5d03dd315828ec23380b0b83b&id=62f4d59b9a This is more of a discussion for the Dweebs today. I thought that I would catch up a bit with some of the techie stuff, as
- [Meteorological Spring arrives today....The Weather will be Beautiful with light breezes through Friday....Next Storm Sunday........](https://mammothweather.com/2017/03/01/meteorological-spring-arrives-today-the-weather-will-be-beautiful-with-light-breezes-through-friday-next-storm-sunday/) - You just can not beat a day like today. Sunny Skies, light breezes and temps in the low 40s. Ridging will be the word through Friday before the upper jet begins to sag south again. This will occur over California Saturday with a storm Sunday. Highs will climb into the 50s Thursday and Friday with lows in
- [Central and Northern Sierra Wet Pattern Winds down as March 1st Snow Surveys begin....They will confirm historic amounts for March 1st.....](https://mammothweather.com/2017/02/24/central-and-northern-sierra-wet-pattern-winds-down-as-march-1st-snow-surveys-begin-they-will-confirm-historic-amounts-for-march-1st/) - The last gasp of California's wet Patten will end the weekend with a whimper, as two small short waves will bring light amounts of snowfall to the high country. Only some 3 to 5 inches are expected for the Town of Mammoth. However, snow to water ratio's will be high. The snow on Mammoth Mt
- [Atmospheric River has Come and Gone...Cold front has pushed through Mono County with improving weather the next few days....](https://mammothweather.com/2017/02/21/atmospheric-river-has-come-and-gone-cold-front-has-pushed-through-mono-county-with-improving-weather-the-next-few-days/) - Wednesday 2-22-17 6:25 AM Temperature 22 degrees. Forecast...Snow showers today. 12Z GFS coming in a lot drier with Sunday/Monday storm... Storm Total 3.5 Feet on Mammoth Mt with over 5 inches of water added to the snowpack. We have likely broken 80 inches over the Pass now.....Record Territory!!! for this early in the season! All
- [Another Strong Atmospheric River takes aim upon the Central and Northern Sierra....Models are a bit higher again with freezing level Monday morning....thoughs in the lower elevations may need to take precautions once again....](https://mammothweather.com/2017/02/19/another-strong-atmospheric-rivwer-takes-aim-upon-the-central-and-northern-sierra-models-are-a-bit-higher-again-with-freezing-level-monday-morning-thoughs-in-the-lower-elevations-may-need-to-take/) - Another major AR event is getting ready to move into the sierra later tonight with copious amounts of moisture....Monday seems to be the main day with the heaviest precipitation. The Snow level may rise to between 7500 to 8100 feet for a time, Monday AM. Weather letter update tonight! http://data.mammothweather.com/landing/ More later......
- [Storms still rolling into California one after another....Those in town concernd about the flood potential from the next AR event can relax a bit now.....But keep the shovels handy!](https://mammothweather.com/2017/02/17/storms-still-rolling-into-california-one-after-another-those-in-town-concernd-about-the-flood-potential-from-the-next-ar-event-can-relax-a-bit-now-but-keep-the-shovels-handy/) - Mammoth Lakes picked up some 12 to 14 inches of snow today Friday with Mammoth Mt snow plot showing 15 inches at the main lodge at 4:00PM. Another 6 to 10 inches is expected tonight, between the Town and the Mountain by mid morning Saturday. There will be some kind of a break in the weather Saturday afternoon into Sunday
- [Major Storm Slated for Southern CA Friday into Saturday with Very Heavy to Excessive Precipitation expected.....Mammoth to receievd snowfall Friday into Saturday AM with moderate amounts...](https://mammothweather.com/2017/02/16/major-storm-slated-for-southern-ca-friday-into-saturday-with-very-heavy-to-excessive-precipitation-expected-mammoth-to-receievd-snowfall-friday-into-saturday-am-with-moderate-amounts/) - The Southern California monster rain storm will effect Mammoth with moderate Snowfall Friday and Friday night. Expect 6 to 10 inches of snow Friday and 3 to 7 inches Friday night. Snow showers are expected Saturday. In regards to the *big storm for the southland Friday into Saturday, for you weather geeks, here is a
- [Another break in the weather in progress with light breezes and partly sunny skies....Next Storm Cycle Begins Thursday.....](https://mammothweather.com/2017/02/13/another-break-in-the-weather-in-progress-with-light-breezes-and-partly-sunny-skies-next-storm-cycle-begins-thursday/) - Wednesday 2/15/17 Today will be the last nice mild day for a while.. Expect highs in the 40s with light breezes and lows tonight in the 20s. Winds will come up tonight. I will have a detailed update on the rest of this weeks weather Thursday morning, as well as a look at the wet pattern for next
- ["Mother of All Winters" working on 30 feet on Top of Old Woolly'....Over 28 Feet reported on the Upper Mountain.......Nice Break in Storm Cycles Ahead......](https://mammothweather.com/2017/02/11/mother-of-all-winters-working-on-30-feet-on-top-of-woolly-over-28-feet-reported-on-the-upper-mountain-nice-break-in-storm-cycles-ahead/) - Monday AM: Important points to be covering over the next 4 weeks: Mono County is officially out of the Drought. This is amazing to have happened in one water year! Madden Julian Oscillation is expected to reach historic proportions within the next week in phases 8-1. (This will jack start El Nino again) Snowpack Here
- [One more Atmospheric River to hit the Sierra hard tonight and Friday with 1 to 2+Feet in the Town of Mammoth.....3 to 4 feet expected on the Mountain will be a Challenge by Saturday AM....](https://mammothweather.com/2017/02/09/one-more-atmospheric-river-to-hit-the-sierra-hard-tonight-and-friday-with-1-to-2feet-in-the-town-of-mammoth-3-to-4-feet-expected-on-the-mountain-will-be-a-challenge-by-saturday-am/) - They say in Meteorology that the 3rd or last storm in a series is often times the biggest. This series may not be an exception....as Mammoth Mt apparently is in the Bull's-eye sights, for this last storm in the series..... Snow-plow driver are weary. Not only do they have a schedule to keep during storms, but
- [Soggy Wet Storms to give way to drying and sunshine over the weekend and into next week.....Next wet pattern taking aim on the High Country Week 2 Friday into the weekend...It is looking kind of splitty at the Moment....](https://mammothweather.com/2017/02/08/soggy-wet-storms-to-give-way-to-drying-and-sunshine-over-the-weekend-and-into-next-week-next-wet-pattern-taking-aim-on-the-high-country-week-2-friday-into-the-weekend-it-is-looking-kind-of-split/) - So far, the Town of Mammoth has picked up 2.24 inches of water from this storm, while Mammoth Mt snow plot at Sesame, indicates up 4.84 inches of water. Another 3.5 to 4 inches is expected over the crest before the last AR is over in this cycle. The Town of Mammoth will get another 1 to 1.5 inches
- [Warmer and Wetter Systems Ahead.....Weekend Looks Great!](https://mammothweather.com/2017/02/02/warmer-and-wetter-systems-ahead-weekend-looks-great/) - Update via Weather Letter Tuesday 12:00PM 2-7-17 http://data.mammothweather.com/landing/ The pattern I see developing over the next 5 to 7 days will be one that favors central and northern CA more with warmer storms and wetter snowfall. Weather systems Thursday, Friday, Sunday night and Monday are associated with a jet stream that is focused further
- [High Clouds will give way to more sunshine today with warmer temps......The Thursday-Friday Storm has turned decidedly wetter for Mono County.....Cloudy but dry weekend still in the Outlook.....But Groundhog's Day Outlook May have a few surprises for the Snow Weary.....](https://mammothweather.com/2017/01/30/high-clouds-will-give-way-to-more-sunshine-today-with-warmer-temps-the-thursday-friday-storm-has-turned-decidedly-wetter-for-mono-county-cloudy-but-dry-weekend-still-in-the-outlook-but-gr/) - Monday 3:05PM.... I find it interesting that for the past two runs, the European wants to bring in another storm to the Sierra early next week while the GFS is building an even stronger ridge with its 12Z run compared to its 06Z from last night. Took a quick look at the WPC QPF 7 day and noted
- [Welcomed Break in the Weather continues with Strong High Pressure Aloft over the weekend....Another Signifacant Storm will make its way into California this Wednesday with heavy snowfall expected Thursday....The following weekend looks dry and beyond.....](https://mammothweather.com/2017/01/27/welcomed-break-in-the-weather-continues-with-strong-high-pressure-aloft-over-the-weekend-another-signifacant-storm-will-make-its-way-into-california-this-wednesday-with-heavy-snowfall-expected-thur/) - Sunday AM: The ECMWF and GFS 12Z runs are closer this more with their height field. Both are very similar with their QPF for the Thursday night/Friday Night system. The storm is still looking like a moderate snowfall producer with between 2 and 2.5 inches of water over the crest and roughly 1/2 in town.
- [SNOW SHOVELERS WANTED.... Lots of work in town......Some light finally at the end of the tunnel indicating that after this next upcoming storm...A longer break seems possible into February if these trends continue............](https://mammothweather.com/2017/01/25/some-light-finally-at-the-end-of-the-tunnel-indicating-that-after-this-next-upcoming-storm-a-longer-break-seems-possible-into-february-if-these-trends-continue/) - Thursday PM Update: IT'S All ABOUT THE BLOCK! In Early Star Wars Movies Luke was told to Search his feelings in regards to the Force. Today as an amateur weather forecaster, as I look around at all the snow in Mammoth Lakes, in searching my feelings, I have to say that I prefer that mother nature
- [Mammoth Digs Out after Seige of Storms leaves snowfall amounts up similar to Late January of 1969...Short Term and Medium Range show a break in the weather of a week to 10 days....While Longer Range has the -EPO and -WPO Raising its Ugly Head Again.........](https://mammothweather.com/2017/01/24/mammoth-digs-out-after-seage-of-storms-leaves-snowfall-amounts-up-simular-to-late-january-of-1969-short-term-and-medium-range-show-a-break-in-the-weather-of-a-week-while-longer-range-has-the-epo/) - Some of the greatest snowfall amounts since the big winter of 1969 has buried the Town of Mammoth Lakes. There are walls of snow some 15 to 20 feet high in some places and snow up to the 2nd story is common place throughout the Mammoth Slope Subdivision. For you locals out there....get lots of
- [Another 4 to 5 Feet Expected for the Town of Mammoth by Monday Night.....Storm Number 2 Rolls in Friday into Early Saturday morning...Followed by High Impact Winter Storm Saturday night into Monday leading up to the wettest January on record.....](https://mammothweather.com/2017/01/20/another-4-feet-expected-for-the-town-of-mammoth-by-monday-night-storm-number-2-rolls-in-friday-into-early-saurday-morning-followed-by-high-impact-winter-storm-saturday-night-into-monday-leading/) - Full on Blizzard Expected for Saturday Night into Sunday for Highway 395 in Mono County.... Everyone must carry Chains this weekend including 4WD with Snow tires. The following is a excerpt from the National Weather Service in Reno. They stress readiness for storm #3... The Dweebs will not update again until Monday night.... WSFO RENO:
- [Next Series of Storms make there way into the High County Today with a Rich Moisture Plume for Storm #1....Amounts for the Town of Mammoth 8 to 16 inches by Mid Morning Thursday.....](https://mammothweather.com/2017/01/18/next-series-of-storms-make-there-way-into-the-high-county-today-with-a-rich-moisture-plume-for-storm-1-amounts-for-the-town-of-mammoth-increased-to-between-1-and-2-feet-by-mid-morning-thursday/) - Thursday the 19th.... Mammoth Mt reported 20 to 30 inches of new this morning. Here at Mammothweather near the village, 16 inches of new has accumulated overnight. The Sierra is close to a record snowpack for this time of the year. The Dweebs are concerned about a significant "AR" event in February on this record snowpack. Although
- [Working on a January Record for Mammoth Lakes Snowfall....](https://mammothweather.com/2017/01/14/working-on-a-january-record-for-mammoth-lakes-snowfall/) - Monday AM: Nice break in the weather for the first 2 days of the week. Time to create snow storage for the next storm cycle that will begin this Wednesday. The next series of storms will be much colder and should for the most part be all snow for the Town of
- [Last gasp of wet pattern dumps 2 feet on the Town of Mammoth....A few more inches expected this evening than a nice 5 day break....Active pattern continues out over the pacific with a new storm or two looming mid week......MJO Raising its ugly head for the potential for another Alaska blocking pattern B-4 months end....](https://mammothweather.com/2017/01/12/last-gasp-of-wet-pattern-dumps-2-feet-on-the-town-of-mammoth-a-few-more-inches-expected-this-evening-than-a-nice-5-day-break-active-pattern-contniues-out-over-the-pacific-with-a-new-storm-or-two/) - Saturday AM; Here is the link for a updated lift status on Mammoth Mountain: http://www.mammothmountain.com/winter/mountain-information/mountain-information/lift-trail-status Friday the 13th, 4:10PM;. There is 22.5 feet on top! According to Cliff Mann, The top is only 20 inches away from a January record. I told Cliff that we will break that record next Wednesday and Thursday with
- [Precipitation tallies continue to add up....Very Wet Atmopheric River now an event of the past....However....Moderate AR still in the picture through Wednesday AM.....Lots more snow coming!!](https://mammothweather.com/2017/01/09/precipitation-tallies-continue-to-add-up-very-wet-atmopheric-river-now-an-event-of-the-past-however-moderate-ar-still-in-the-picture-through-wednesday-am-lots-more-snow-coming/) - As of 8:45 am Monday, Mammoth Pass has picked up 7.96 inches of water since AR # 2 started Saturday. Add that to AR #1 of 8.44 and you get about 16.5 inches of water. That a lot and there is possibly another 6 more inches to come by Thursday Night!. Fridays storm is not
- [Next big storm has moved into the high country with moderate snowfall.....Cold Air trapped in the lower elevations will ensure snowfall well into the afternoon....Rain still forecasted for later tonight through Sunday Night with rain changing back to snow Monday Morning in Mammoth Lakes....](https://mammothweather.com/2017/01/07/next-big-storm-has-moed-into-the-high-country-with-moderate-snowfall-cold-air-trapped-in-the-lower-elecvations-will-ensure-snowfall-well-into-the-afternoon-rain-even-still-forecasted-for-later/) - Saturday at 1:30 PM Here are some interesting temps to show warm frontal snowfall. It will give you a profile of temperatures; Temps: Summit of Mammoth Mt 25f Main Lodge 30 Village at Mammoth 26 Crestview station 25 Mammoth AP 25 Moderate Snow Bishop AP 31 Light Snow ------------------------------------------------------------- The Temperature at Mammoth Lakes this morning has
- [Let the Weather Patterns Begin!....Cold Storm 1st Mid Week then Wet and Wild over the weekend......General Quantitative Central Sierra precipitation forecasts of 25 to 30 inches of water EQ by January 13th......](https://mammothweather.com/2017/01/03/let-the-weather-patterns-begin-cold-storm-1st-mid-week-then-wet-and-wild-over-the-weekend-general-quantitative-central-sierra-precipitation-forecasts-of-25-to-30-inches-of-water-eq-by-mid-wee/) - Thursday AM Update: Think we have had a big winter so far? Think again...According to the DWP, as of January 4th yesterday, Mammoth Pass was only 101% of normal. However, that does not reflect much of the 7.85 inches that has fallen by 10:00AM Thursday.... Mammoth Mt Reporting 3.5 feet to 7 feet of
- [Major Storm Cycle Ahead as -EPO Rex Block Forces Strong Southerly Stream into Central West Coast....Copious AR Precipatation Event Probable for the Northern and Central Sierra....](https://mammothweather.com/2017/01/02/major-storm-cycle-ahead-as-epo-rex-block-forces-strong-southerly-stream-into-central-west-coast-copious-precipatation-event-probable-for-the-northern-and-central-sierra/) - UPDATE 10:45 AM Monday: The QPF updates keep coming and the resounding questions becomes... will there be a break as several waves of energy are expected to pound Central CA this week. The series QPF 24 hour bull's-eyes moves slightly north and south of a pivot point from about Mammoth Pass this week as follows.. Day 1
- [Forecast Models Throwing inside slider.....Strike 3 for the Weatherman....Big changes ahead...](https://mammothweather.com/2016/12/31/forecast-models-throwing-inside-slider-strike-3-for-the-weatherman-big-changes-ahead/) - Its been interesting to watch the big mass of cold Arctic Air being handled by the forecast models. It is important to realize that it takes a reservoir of cold air to tap from over Canada for the pool to from. Keeping in mind that for the far west coast, which normally does not get this kind
- [Mild Weather to give way to unsetteled weather for the weekend....Best chance of snowfall....Sunday night into Monday...Turning much colder as Arctic Front approaching Sunday Night....."Platinium Power Watch" for Monday through Tuesday Night....](https://mammothweather.com/2016/12/28/mild-weather-to-give-way-to-unsettelled-for-the-weekend-best-chance-of-snowfall-sunday-night-into-monday-turning-much-colder-as-arctic-front-approached-early-next-week/) - Thursday AM Update: Cut off low is turning east before any significant effect upon the Central Sierra. Updates show that clouds and a few snow showers possible, but accumulations are very unlikely for the Friday/Night system. Saturday's small coastal hugger from the north may bring 1 to 3 inches of snow Saturday/Evening. This is going to
- [Milder weather ahead as a flat ridge builds in over head....Strong Valley inversions expected.....Next weather system is a California Slider Friday night into New Years Eve.....Bitter Arctic Break out possible just after New Years Day....](https://mammothweather.com/2016/12/26/milder-weather-ahead-as-a-flat-ridge-builds-in-over-head-strong-valley-inversions-expected-next-weather-system-is-a-california-slider-friday-night-into-christmas-eve-bitter-arctic-break-out/) - Todays brief update calls for milder weather into Thursday with highs in the 20s Monday, 30s Tuesday and 40s Wednesday and Thursday. Winds will be light and lows at night in the single digits then teens Tuesday am. The fair weather trend will continue into Thursday with increasing breezes by Friday. The next storm will
- [Rapid exit of Friday's Storm has provided a beautiful Saturday Morning....unstable air aloft may still provide a little more snow today....Then fair and milder through the middle of the up coming week......Gulf of Alaskan Block may make return the first week of January....](https://mammothweather.com/2016/12/24/rapid-exit-of-fridays-storm-has-provided-a-beautiful-saturday-motrning-unstable-air-aloft-may-still-provide-a-little-more-snow-today-then-fair-and-milder-through-the-middle-of-the-up-coming-we/) - Weather Letter Update Tuesday AM Snowfall Tallies: Village at mammoth 14 inches Main Lodge 20 inches Top of Mountain 32 inches Cold Upper Trof is exiting California today but not before a few pockets of instability track through the sierra. These pockets, (Vort maxes) will kick off some snow showers with another inch
- [The Friday/Saturday snow storm to favor Southern Mono County as Upper Jet Dives Toward Southern California...Winter Storm Warnings hoisted for Mono County at 10:00AM Friday through 12:00PM Saturday.....](https://mammothweather.com/2016/12/22/the-fridaysaturday-snow-storm-to-favor-southern-mono-county-as-upper-jet-dives-toward-southern-california-winter-storm-warnings-hoisted-for-mono-county-at-1000am-friday-through-1200pm-saturday/) - Finally a Storm that will Favor Southern Mono County and the Southern Sierra. In that the Upper jet is diving a bit more south now with the front left exit region favoring the southern sierra and southern Central Sierra, The QPF's bull's-eye has been shifted south to near Mammoth Lakes now with between 2 to 3 feet
- [Increasing Amplitude in the Eastern Pacific High north of Kauai and south of the Aleutians.....First in a series of storms to hit Eastern Sierra Friday night and Saturday.....with additional storms possible into New Year....](https://mammothweather.com/2016/12/20/increasing-amplitude-in-the-eastern-pacific-high-north-of-kauai-and-south-of-the-aleutians-first-in-a-series-of-storms-to-hit-eastern-sierra-friday-night-and-saturday-with-additional-storms-po/) - Wednesday AM: Small Adjustment in the QPF this Am with adjustments in the timing as well. Expect snow to begin falling between 7:00AM and 8:00AM with a heavier snowfall rates after 10:00AM Friday. A winter storm Watch goes into effect at 10:00AM Friday. Heavy snow is expected with rapidly falling temps Friday afternoon into Friday
- [Milder weather on the way before major pattern change occurs....Christmas Weekend to be cooler then normal...With a slight chance of snow showers.....](https://mammothweather.com/2016/12/18/milder-weather-on-the-way-before-major-pattern-change-occurs-christmas-weekend-to-be-cooler-then-normal-with-a-slight-chance-of-snow-showers/) - Monday AM, Contrary to last nights post, both ECMWF and GFS has a moderate short wave approaching the Sierra Friday for moderate snowfall. (6 to 12 inches) The Dweebs are still skeptic on this change...will update Tomorrow. Longer Range: The GFS has the MJO increasing in amplitude in Phase spaces 8/1. This would argue for
- [Thursday's storm is slowing down and so is the cold air push into Mammoth......Rain may not change to snow untill after midnight in town Thursday night.....Elevations above 9K should be all snow Thursday Night into Friday with amounts increasing Thursday into Friday...Over 4 feet of snow is possible now over the upper elevation of Mammoth Mtn as Massive AR event unfolds for Thursday night into Friday Morning....](https://mammothweather.com/2016/12/13/thursdays-storm-is-slowing-down-and-so-is-the-cold-air-push-into-mammoth-rain-may-not-change-to-snow-untill-after-midnight-in-town-thursday-night-elevations-above-9k-should-be-all-snow-thursd/) - Friday Afternoon 3:00PM Upper Trof Axis has pushed through with cold northerly flow now. Looking at a 3 dog night with lows 0 to -10. Finally Tally... (EQ) 5.13 inches of water (Mammoth Mt) 2.86 inches of water at the Village at Mammoth 39 to 56 inches on Mammoth Mountain; Total Base Depth 54 to 132
- [This Patterns Grand Finale is in sight with heavy snowfall predicted for lower slopes.....Mammoth Mts Night of Lights to be Fair and Cold with lots of Snow on the Ground....](https://mammothweather.com/2016/12/12/this-patterns-grand-finale-is-in-sight-with-heavy-snowfall-predicted-for-lower-slopes-mammoth-mts-night-of-lights-to-be-fair-and-cold-with-lots-of-snow-on-the-ground/) - As we head toward the Yule Season and looking back, the weather events of the recent past seem to confirm the frustrations on how the state of the art WX modeling has a long way to go in handing complex patterns such as the one we are in at the moment. The flip-flopping of the global models in
- [After Strongest AR Push into the Sierra Saturday with Rain Below 9K....Colder Storm Cycle setting up beginning this Tuesday and again next Friday into the following weekend...Several Feet of Snow top to bottom...](https://mammothweather.com/2016/12/09/after-strongest-ar-push-into-the-sierra-saturday-with-rain-below-9k-major-cold-storm-cycle-setting-up-beginning-this-tuesday-and-again-next-friday-into-the-following-weekend-several-feet-of-snow/) - I have to say that this pattern and its evolution is certainly one of the most challenging in recent memory. The models have been gone a bit berserk with several solutions. I think that the up shot here is that we will have a moderate rain event Saturday with snow above 9000 to 9500 feet. Mammoth Mountain above 10K could pick
- [Active pattern returns to the Eastern Sierra with cold wave followed by Atmospheric River Event...](https://mammothweather.com/2016/12/05/active-pattern-returns-to-the-eastern-sierra-with-cold-wave-followed-by-atmospheric-river-event/) - Just in at 11:L45 AM the new 12z ECMWF QPF has between 7 and 8 inches of precip for Mammoth Mtn and west side over the next 10 days.... That could be 70 to 80 inches of snow! Just in time for Christmas! Dec 12th update: Mammoth Mt reports 5 to 7 inches of
- [Progressive pattern to highlight next weeks weather with Monday-Tuesday system most likey now a strong NW Slider.....Light snowfall amounts expected.......Wetter pattern with "AR"and higher snow levels still looks good during second half of next week.....](https://mammothweather.com/2016/12/01/progresive-pattern-to-highlight-next-weeks-weather-with-monday-tueaday-system-most-lilley-now-strong-nw-slider-light-snow-fall-amounts-expected-wetter-pattern-with-higher-snow-levels-still-l/) - Sunday Afternoon the 4th: Cold wave moving in Monday night into Tuesday with light snow possible into Tuesday.....Very Significant AR event developing for the Central and Northern Sierra beginning Thursday AM as Kona Low draws up copious amounts of moisture from the ITZ then through Hawaii...as Warm front pushes into the sierra Thursday.....The Dweebs will
- [Mammoth Mountain Reports 15 to 34 inches in the wake of weekend storm...Weather pattern now turning decisively drier as upper pattern shifts to strongly progressive...](https://mammothweather.com/2016/11/28/mammoth-mountain-reports-15-to-34-inches-in-the-wake-of-weekends-storm-weather-pattern-now-turning-decisivly-drier-as-upper-pattern-shifts-to-strongly-progressive/) - In accordance with my last weather letter and Dweeb update, the WX pattern by both models have turned decisively progressive. This means that the weather is moving quickly from the eastern pacific across the CONUS; (contiguous united states) and pausing from the Gulf of Ak to deepen down the west coast. As an example, the storm that was supposed
- [Storm system now moving into Mono County...Heaviest snowfall late tonight into Sunday Morning...... Focus then hinges upon Friday system and its formation and movment...](https://mammothweather.com/2016/11/26/storm-system-now-moving-into-mono-county-heaviest-snowfall-late-tonight-into-sunday/) - Lots to ponder and the wait on the longer range is taking its toll on this Dweeb.... I will update tonight in my letter for Sunday about the details on the coming pattern changes and how it will effect the longer range. This first system is splitting somewhat. However should remain intact enough to provide a
- [Split flow blues to have silver linning as split delayed allowing decient moisture to arrive Sunday.....Thanksgiving Turkeys to gobbeling in the snow this season with more on the way afterwards....](https://mammothweather.com/2016/11/19/split-flow-blues-to-have-silver-linning-as-split-delayed-allowing-decient-moisture-to-arrive-sunday-thanksgiving-turkeys-to-gobbeling-in-the-snow-this-season-with-more-on-the-way-afterwards/) - 5:30PM Split flow taking its toll but active area to our west still expected to move east......North/South orientated Precip band is from about June Lake north with a fairly active area over Madera to the west. We may still get a few inches out of it so hold on.... As mentioned in earlier post...Split
- [Cold Windy System Approaching West Coast Tonight....Highlights are wind and cold with light snow....Split flow pattern brings a lot of uncertanity to Sunday/Monday Storm....](https://mammothweather.com/2016/11/15/cold-windy-system-approaching-west-coast-tonight-highlights-are-wind-and-cold-with-light-snow-split-flow-pattern-brings-a-lot-of-uncertanity-to-sundaymonday-storm/) - Forecast remains the same as a windy system approaches tonight.....It will be a lot colder Wednesday and even colder Thursday because of the chilly NW jet on the Trof back side. The current extension of the East Asian jet comes without much in the way of moisture for Central CA. The wave length between the eastern
- [Cooler temps will now prevail with a small system bringing light amounts of snowfall Tuesday night and Wednesday.....Next weather system timing is uncertain....](https://mammothweather.com/2016/11/12/cooler-temps-will-now-prevail-with-a-small-system-bringing-light-amounts-of-snowfall-tuesday-night-and-wednesday-next-weather-system-timing-is-uncertain/) - Yesterday afternoon the Dweebs were a bit confused about certain coincidences in the weather forecast charts across the pacific. For one, a vigorous trof was progged into Central Ca Wednesday, forecasting Light to Moderate amounts of snowfall over the Central Sierra. Two; While the energy coming off japan was showing to be very weak, without any real surface deepening until it passed 160 East. Today
- [The current episode of anomalous warmth will peak over Eastern CA the next few days and hold through the weekend.....RIMM signel still very strong for pattern change later next week......](https://mammothweather.com/2016/11/08/the-current-episode-of-anomalous-warmth-will-peak-over-eastern-ca-the-next-few-days-and-hold-through-the-weekend-rimm-signel-still-very-strong-for-pattern-change-later-next-week/) - Quick Update this Voting Day Tuesday to say that the RIMM phase space is still a go for retrogression of the long wave features later this week into next week. There will be no sensible weather changes this week. However, next week will become cooler by mid-week with an increase in wind and high clouds.
- [Fair weather days to continue through the weekend with some cooling Saturday....Pattern change underway this weekend with light to moderate snow probable Wednesday....](https://mammothweather.com/2016/11/10/fair-weather-days-to-continue-through-the-weekend-with-some-cooling-saturday-pattern-change-underway-this-weekend-with-light-to-moderate-snow-probable-wednesday/) - Here is a brief update on the changes expected next week over the western hemisphere due to tropical forcing over the Western and Central Pacific.. The big news this morning is that the pattern changes touted by the MJO RIMM the end of October, are making their way into the week 2 global
- [MJO into Phase Space 6 then 7...Some high temperature records possibe for the Golden State.....Watch for big change in the pattern about the end of 3rd Week of November...](https://mammothweather.com/2016/11/07/mjo-into-phase-space-6-then-7-some-high-temperate-records-possibe-for-the-golden-state-watch-for-big-change-in-the-pattern-about-the-end-of-3rd-week-of-november-week-2/) - There is some amazing amplification taking place in the MJO RIMM. Today, as has been the case the past week the MJO phase space has been going crazy! Take a Look! http://www.cpc.noaa.gov/products/precip/CWlink/MJO/CLIVAR/ncpe.shtml That my friends spells real change! It is a longer period western pacific tropical signal that has a pretty good linear relationship to our
- [October Record Rainfall to be followed by a Dubious November....some interesting developments through....](https://mammothweather.com/2016/11/01/october-record-rainfall-to-be-followed-by-a-dubious-november-some-interesting-developments-through/) - Its November 1st, and the Dweebs are beginning to look at the hemispheric weather pattern more seriously. I get that NOAA's winter outlook shows no biases one way or another for Central CA and for good reasons. We are pretty much ENSO neutral with only a weak bias to La Nina. In looking at the last
- [Storm # 2 Leaves elevations below 8K pretty much snowless....Next system to bring a few snow showers Tuesday AM....Then a long break ahead....](https://mammothweather.com/2016/10/30/storm-2-leaves-elevations-below-8k-pretty-much-snowless-next-system-to-bring-a-few-snow-showers-tuesday-am-then-a-long-break-ahead/) - Monday AM: Storm Total for the Village at Mammoth 1.73 inches....This morning there is between 1 and 2 inches on the deck at the 8200 foot level. What is outstanding is the total rain/snowfall in inches here at Mammothweather.com. A whopping 8.02 for the month of October! The Dweebs do not recall that much precipitation
- [Storm 1 is winding down...Storm 2 to arrive Early Sunday Morning....](https://mammothweather.com/2016/10/28/storm-1-is-winding-down-storm-2-to-arrive-sunday-morning/) - Some nice precip totals so far. At the Village at Mammoth 2.13 inches of rain so far has fallen. 2.78 on Mammoth Mt. The wet short wave has now passed into Nevada and improving weather is expected until Saturday night when a colder system arrives with Snow expected in town. Storm number 3 if you want to
- [Big Wet Storm in process with lots of rain Tonight and Friday.....Big PWAT Plume pointed at Mammoth...Snow in the Town of Mammoth Sunday/Night...](https://mammothweather.com/2016/10/27/big-wet-storm-in-process-with-lots-of-rain-tonight-and-friday-big-pwat-plume-pointed-at-mammoth-snow-in-the-town-of-mammoth-sundaynight/) - Storm 1. Just like I said....Models do not handle Subtropical moisture very well. Most of the models had the bulk of the precipitation further north of Mammoth but they have been back peddling south the past two days. 500MB 567DM upper low is west of Pt Conception with both subtropical and weak southern branch of
- [Height Rises to provide warmer days and a bit of a break in the wind later today and into Wednesday....Next short wave to tap Bonanza of subtropical moisture from north of ITZ and remains of Hurricane Seymour with potential for another rain event for the high country Thursday into Friday.......Cooler system to move in Late Saturday night with the chance of some snowfall to the Towns of Mammoth and June Sunday AM....](https://mammothweather.com/2016/10/25/height-rises-to-provide-warmer-days-and-a-bit-of-a-break-in-the-wind-later-today-and-into-wednesday-next-short-wave-to-tap-bonanza-of-subtropical-moisture-from-north-of-itz-and-remains-of-hurricane/) - As the pattern evolves this week, the picture is becoming increasingly clear that another wet storm is in store for the Central and Northern Sierra for Thursday into Friday and a colder system late Saturday night into Sunday with Showers possible Monday. The first system has a big tropical/subtropical tap all the way down to
- [Another Active 2nd half of the week is expected with the potential of more heavy rain Thursday Night into Friday....October rainfall records look to be in jeopardy....](https://mammothweather.com/2016/10/24/another-active-2nd-half-of-the-week-is-expected-with-the-potential-of-more-heavy-rain-thursday-night-into-friday-october-rainfall-records-look-to-be-in-jeopardy/) - The front left exit region of the subtropical jet is creating the lift this morning to produce some light rainfall in the Town of Mammoth. Once this wave passes we will have lots of clouds the next couple of days but dry weather. A long wave trof has taken up residence over the Eastern Pacific.
- [October Precipitation off to a grand start with 4.03 inches of rain here at the Village at Mammoth over the weekend....For some areas it is the 3rd wettest Oct on record already.....Still lots more time this month to set all time October Precipitation Record......While we wait....Another warm up is in store with temps in the upper 60s Friday.......Is another AR event in the cards for Northern and Central CA this month?](https://mammothweather.com/2016/10/18/october-precipitation-off-to-a-grand-start-with-4-03-inches-of-rain-here-at-the-village-at-mammoth-over-the-weekend-for-some-areas-it-is-the-3rd-wettest-oct-on-record-already-still-lots-more-ti/) - A great storm for the trees! They need water just like we do. Four inches of rain will certainly help the forest but unfortunately it is too late for many of our giant pines.... Some are now widow makers so be sure to check out carefully around your residence's. If the're up wind and dead,
- [Wet Windy Weekend expected throughout Mono County.....Main Snowfall will be at elevations above 10000 to 11000 feet....Winds will Increase Tonight...However, for Southern Mono County...The strongest winds may end up being Saturday Afternoon.....Stormy Period to end Monday with the upper jet lifting north next week for a long stretch of Fair Warm Indian Summer Weather....](https://mammothweather.com/2016/10/13/wet-windy-weekend-expected-throughout-mono-county-main-snowfall-will-be-at-elevations-above-10000-to-11000-feet-winds-will-increase-tonight-however-for-southern-mono-county-the-strongest-w/) - Saturday morning.... Strongest winds have verified further north with Upper Jet the same. Although the stronger upper jet has yet to enter CA and is is still on tap for Sunday, the NWS has seen fit to keep winds in Mono County at advisories levels. Plenty of rain is still on the way for Tonight and Sunday...
- [Beautiful warm weekend to be followed by clouds and cooler weather next week.....Atmospheric River to take aim on Northern CA beginning Thursday with heavy precipitation as anomalous upper jet sags south to the CA/OR Border.....](https://mammothweather.com/2016/10/08/beautiful-warm-weekend-to-be-followed-by-clouds-and-cooler-weather-next-week-atmospheric-river-to-take-aim-on-northern-ca-beginning-thursday-with-heavy-precipitation-as-anomalous-upper-jet-sags-so/) - Monday AM: Some tweaks to the forecast for the up coming week. AR event is still on track for the Pacific NW and Northern CA with the southerly boundary of the AR now forecasted for Central CA. The are four points worth mentioning in the upcoming event. It is going to get quite windy in
- [Chilly Northwest flow to continue through mid week before weak ridging warms Eastern CA over the weekend....It looks like another spectacular weekend for the high country with slightly above normal temps....Cooler breezy weather returns by the following midweek...Storm Clouds are on the Horizon.....](https://mammothweather.com/2016/10/04/chilly-northwest-flow-to-continue-through-mid-week-before-weak-ridging-warms-eastern-ca-over-the-weekend-this-look-like-another-spectacular-weekend-for-the-high-country-with-slightly-above-normal-t/) - Wednesday 10/5/16 Strong blocking over the State of Alaska, WNW to Asia will be the dominant teleconnection effecting the weather along the central and especially the NW coast. An AR event is probably in the picture at some point as Low Pressure in the North Pacific and the Pacific Jet taps a lot of
- [Upper Low bottomed out over Oregon today and upper trof now racing eastward....It is doubtful that any measurable precip will reach Mammoth....Cooler....Breezy weather is expected to continue through Tuesday with seasonal weather after mid week...](https://mammothweather.com/2016/10/02/upper-low-bottomed-out-over-oregon-today-and-upper-trof-now-racing-eastward-it-is-doubtful-that-any-measurable-precip-will-reach-mammoth-cooler-breezy-weather-is-expected-to-continue-through/) - 10:15AM Monday There are a few radar returns at the moment just to the west of Mammoth Mt. This is part of a short wave in the upper flow bringing some showers to Northern CA. Outside of a few flurries today over the crest...little if any chance for anything measurable.... The high clouds you are seeing
- [Above normal temps to continue through mid week then upper trough from Gulf of AK to swing toward the west coast as we approach the weekend.....At this time the trough is dry for the eastern sierra but much cooler weather is expected for the upcoming weekend...Long Range forecasters are going to have a difficult time with the upcoming winters outlook....](https://mammothweather.com/2016/09/26/above-normal-temps-to-continue-through-mid-week-then-upper-trough-from-gulf-of-ak-to-swing-toward-the-west-coast-as-we-approach-the-weekend-at-this-time-the-trough-is-dry-for-the-eastern-sierra-bu/) - Wednesday Evening 10:00PM I have been chatting about the trend of late of ENSO, SST anomalies and the Warm Pool. Since the middle of September, the 30 day ave of the SOI has become increasingly positive, resulting of the strengthening of the trades. So La Nina is strengthening as well. OPIN... It has a chance now to become at least moderate I believe. This
- [Wind Shift has shifted smoke away from Mammoth Lakes....Further increases in westerly flow should help as well.....Forecasters keeping weary eye on remnant moisture from Hurricane Paine for Mono County......](https://mammothweather.com/2016/09/19/wind-shift-has-shifted-smoke-away-from-mammoth-lakes-further-increases-in-westerly-flow-should-help-as-well-forecasters-keeping-weary-eye-on-remnant-moisture-from-hurricane-paine-for-mono-count/) - Tuesday AM: 6:20am Subtropical moisture is surging northward from tropical storm Paine. Showers and higher humidity has moved into Southern Ca. High level moisture has made it as far north as Kern County with more of it moving north. High clouds will be on the increase today for the central and southern sierra. For today and
- [Smokey Skies from Owens River Fire to continue through Monday AM with a wind shift expected during the afternoon...More southwest flow next week will keep most smoke away from Mammoth.....New Upper Low to bring wind and cooling Wednesday with FROPA Thursday Mid morning...slight chance of showers Thursday AM....](https://mammothweather.com/2016/09/18/smokey-skys-from-owens-river-fire-to-resist-through-monday-am-with-a-wind-shift-expected-during-the-afternoon-more-southwest-flow-next-week-will-keep-most-smoke-away-from-mammoth-new-upper-low-t/) - Monday AM: Wind shift happened last night..... So we are out of the smoke until the upper flow comes out of the north again or the fire is out.... Expect breezier days and eventually night ahead.... ________________________________________________________________________________________________________________________________________________________ It was quite the smoky morning Sunday with Air Quality in the tank until the
- [After a September Tease...Weather returns to Summer with highs in the mid 70s by weeks end......No storminess in sight!](https://mammothweather.com/2016/09/14/after-a-september-tease-weather-returns-to-summer-with-highs-in-the-mid-70s-by-weeks-end-no-storminess-in-sight/) - 12:00PM Sunday PM10 count back to good at 84 from 385 earlier this morning.... Inversion broke as forecasted... Chances are that it will become at least moderate again by early Monday AM. Sunday 7:00AM Owens River Fire Grown to 4000 acres...According to NWS Mammoth Lakes Air Quality PM 10 count.....Very unhealthy Stay indoors- windows
- [Early Season Cold Front will move through Central CA overnight Monday, bringing gusty winds ahead of it and some 20 degrees of cooling by Tuesday.....Although precipitation will diminish rapidly from north to south for Mono County...A dusting is still possible above 9500 feet Tuesday.....Temperatures will rebound the 2nd half of this week.....](https://mammothweather.com/2016/09/12/early-season-cold-front-will-move-through-central-ca-overnight-monday-bringing-gusty-winds-ahead-of-it-and-some-20-degrees-of-cooling-by-tuesday-although-precipitation-will-diminish-rapidly-from/) - An early season Cold Front was located near highway 80 north of Tahoe this morning. Latest 12z WRF Guidance at 500MB digs the upper trof with about 90 to 100 knot upper jet, north of the front, southwestward to the Bay Area late tonight...stalling out the cold front. Afterword's.... the upper jet runs out of steam
- [Beautiful late summer days to give way to showers and some thunder early next week.....High temps to cool some 20 degrees by Tuesday before rebounding the second half of next week...](https://mammothweather.com/2016/09/09/beautiful-late-summer-days-to-give-way-to-showers-and-some-thunder-early-next-week-high-temps-to-cool-some-20-degrees-by-tuesday-before-rebounding-the-second-half-of-next-week/) - Mammoth continues to enjoy some of the finest Summer weather in years with somewhat above normal heights and light breezes. Thereafter, the pattern will change to one of being much cooler with showers, TSRWs and possibly a light dusting of snow to the sierra crest Tuesday and into Wednesday AM..... WX Discussion: High pressure will remain in control through early
- [Cool Holiday Weekend with Breezy Weather gives way to more seasonal temperatures by Mid Week.....Early morning lows in the 30s will lift into the 40s later this week....It will be another dry week ahead.....Southern half of Arizona and New Mexico braces for remains of Tropical Storm Newton Mid Week......](https://mammothweather.com/2016/09/05/cool-holiday-weekend-with-breezy-weather-gives-way-to-more-season-temps-by-mid-week-early-morning-lows-in-the-30s-will-lift-into-the-40s-later-this-week-it-will-be-another-day-week-ahead-so/) - Dry upper Trof is now lifting NE away from the Eastern Sierra.....Not before leaving a fall like chill in the air and some frost. High temperatures Sunday were in the low 60s and this morning low was between 32 and 33 degrees near the Village. The official low at the Ranger Station was probably below freezing as
- [Beautiful late Summer days through mid week with Fall like Trough deepening south toward the holiday weekend.....The trough will bring breezy and cooler weather.....No precipitation expected at this time....](https://mammothweather.com/2016/08/29/beautiful-late-summer-days-through-mid-week-with-fall-like-trough-deepening-south-toward-the-holiday-weekend-the-trough-will-bring-breezy-and-cooler-weather-no-precipitation-expected/) - Thursday AM 9-1-16 The ECMWF from last nights 00z run was cooler again with the upcoming trof. it showed temps Sunday at 5:00PM at 10,000 foot level at 45F degrees, (7C); by Monday AM cooling to 3C (37F) by Monday AM. These are free air temps. If they verify, we may be looking more in the
- [Seasonal temperatures will continue this week with some warming by weeks end.....First Fall like Trough to effect the High Country Labor Day Weekend](https://mammothweather.com/2016/08/24/seasonal-temperatures-will-continue-this-week-with-some-warming-by-weeks-end-first-fall-like-trough-to-effect-the-high-country-labor-day-weekend/) - Monday AM: Extended outlook later this afternoon.... After some rain the past few days...drier air has pushed in from the Northwest as of late. No rain is expected in the high country through Thursday. After Thursday, the upcoming weekend shows a slight uptick in temps, as well as some increase in mid level moisture
- [Weak Upper Low off the Central Coast to drift south...providing a continuation of afternoon convection and easterly flow over the sierra...warm days to continue with the slight change of showers and T Storms through Tuesday......Solar Minimum on the way......Increasing Odds for wetter CA winters in the coming year's.....](https://mammothweather.com/2016/08/19/weak-upper-low-off-the-central-coast-to-drift-south-providing-a-continuation-of-afternoon-convestion-and-easterly-flow-over-the-sierra-warm-day-to-continue-with-the-slight-change-of-showers-and-t/) - Weak upper low remains quasi stationary off the Central CA coast the next few days. This is good news for the Mammoth area in that an easterly flow will tend to keep smoke from burning fires to the west of Mammoth. This mornings forecast model run shows the upper low shifting south early next week with SE
- [Upper trof lifting quickly NE today as Upper Ridge builds in....Quick warmup now into the weekend with low 80s expected in Mammoth Lakes.....Scripps/MPI Hybrid Coupled Model continues to back peddle on strength of La Nina for upcoming winter.....Peak of the Perseides Meteor Shower after midnight tonight.....](https://mammothweather.com/2016/08/11/upper-trof-lifting-quickly-ne-today-as-upper-ridge-builds-in-quick-warmup-now-into-the-weekend-with-low-80s-expected-in-mammoth-lakes-scrippsmpi-hybrid-coupled-model-continues-to-back-peddle-o/) - Sunday AM Update: It was a warm one in Mammoth Saturday with a high temperature of 85 degrees. This Summer there has been more mid 80s then I can remember..... One reason for this is that the AZ Monsoon has been pretty much absent this Summer. I have written about this several times in past
- [The break from record heat will continue into the new week with slightly below normal temps in the high country......Warmer weather is expected 2nd half of the new week.....Dry pattern to continue......Perseids flying high next week!](https://mammothweather.com/2016/08/07/the-break-from-record-heat-will-continue-into-the-new-week-with-slightly-below-normal-temps-in-the-high-country-warmer-weather-is-expected-2nd-half-of-the-new-week-dry-pattern-to-continue/) - It's been a little chilly at night as of late. Early morning lows have been in the low 40s in Mammoth and as chilly as 30 in the Bridgeport area. The extremely dry air combines with off shore troughing is likely to continue through mid week. This will include the usual zephyr afternoon and evening breezes.
- [Cooling trend now in process with excessive heat spell now in the past.....Records broken, both for dates and consecutive days......With the passing of July, climatology indicates a gradual cool down for August......Perseids meteor shower will be the best in 7 years!](https://mammothweather.com/2016/07/31/cooling-trend-now-in-process-with-excessive-heat-spell-now-in-the-past-records-broken-both-for-dates-and-consecutive-days-with-the-passing-of-july-climatology-indicates-a-gradual-cool-down-f/) - Thursday PM: All areas should be pretty close to normal, temperature wise today... The developing Trof off shore has initiated a southerly flow aloft and so monsoon moisture has been tapped and streaming north. Some showers reported over mainly south central Mono County. Moisture will flush east tomorrow. The temperature forecast for Mammoth is in the
- ["The Heat Is On", with stretch of hottest days of the summer at hand.....As Upper High rebuilds over CA and Nevada this Tuesday, a few more high temperatures records are possible....Southerly flow possibly pushing up into Eastern CA by Thursday or Friday will bring the chance of thunderstorms beginning Thursday with better chance by Friday into Saturday.....Then Dry Sunday....The following week looks cooler with the return of stronger zephyr breezes.....](https://mammothweather.com/2016/07/25/the-heats-is-on-with-stretch-of-hottest-days-of-the-summer-at-hand-upper-high-rebuilds-over-ca-and-nevada-later-in-the-week-with-southerly-flow-possibly-pushing-up-into-eastern-ca-by-next-weekend/) - Record Temperatures expected the next 3 days over Eastern CA with some relief next week.....Bishop CA has recorded three days in a row of 107. Today, the temperature may hit a whopping 109 at the airport! Then 109 again tomarrow. Updated Tuesday AM: The big story will continue to be the heat for both Mono
- [Last few days of upper 70s before jump to 80s on Friday.....Continential Sub Tropical High will rapidly stretch westward Thursday into the Weekend with Hot Temperatures for CA and very warm temps for Resort Levels this weekend......Monsoon will come to our rescue developing sometime the 2nd half of next week to dampen heat wave with chances of rain in the High Country....](https://mammothweather.com/2016/07/20/last-few-days-of-upper-70s-before-jumt-to-80s-on-friday-continential-sub-tropical-high-will-rapidly-stretch-westward-thursday-into-the-weekend-with-hot-temperatures-for-ca-and-very-warm-temps-for/) - Although the possibly of a 600DM upper high over central CA is currently out of the forecast....it will get very warm nevertheless. Heights are expected to approach 597Dm by the end of the month with 1000-500MB thicknesses approaching 588DM. That is good for between 105 and 108 in Bishop and mid to upper 80s in Mammoth.
- [Another Upper Trof will  push into the Pacific NW this weekend bringing some cooling along with stronger Zephier breezes.....Saturday through Monday.....Summertime Monsoon Still Shut Down for the Central Eastern Sierra with signs of a return before the end of the month....](https://mammothweather.com/2016/07/15/another-upper-trof-will-push-into-the-pacific-nw-this-weekend-bringing-some-cooling-along-with-stronger-zephier-breezes-saturday-through-monday-summertime-monsoon-still-shut-down-for-the-cent/) - Sunday PM: Although the Pacific NW upper Trof has slowed some from last weeks forecasts...gradients are still forecast to tighten tonight and Monday. Gusty winds a good bet later tonight and Monday along with some cooler temperatures Monday. Big changes are in store for Eastern CA over the next one to two weeks. The European model has strong retrogression of
- [High Pressure building in over Northern CA and Western NV will begin warming trend through Mid Week with light breezes...Summertime Monsoon shut down untill further notice....](https://mammothweather.com/2016/07/11/high-pressure-building-in-over-northern-ca-and-western-nv-will-begin-warming-trend-through-mid-week-with-light-breezes-summertime-monsoon-shut-down-until-further-notice/) - The weather pattern over the far west was anything but normal the past few days with 100 MPH winds over the top of Mammoth Mt Sunday AM with a rather chilly Monday morning. There were several reporting RAWS sites with 32 degrees this morning. Crestview...Bridgeport and Ellery Lake. The anomalous weather is due to the combination of an active
- [West Coast Ridge weakening this week leading to more seasonal temps through Thursday.....Strong for July upper trof will move through the pacific NW bringing cooler weather....Gusty Winds and Critical Fire weather Saturday......](https://mammothweather.com/2016/07/06/west-coast-ridge-weakening-this-week-leading-to-more-seasonal-temps-through-thursday-strong-for-july-upper-trof-will-move-through-the-pacific-nw-bringing-cooler-weather-gusty-winds-and-critical/) - Sunday AM: History in the making....Top of Mammoth Mt gusts to 103MPH this morning at 5:00AM....Still gusting to 98MPH......Chatted with lead forecaster at RENO this AM.....This July trof is the strongest for this time of the year "ever recorded". Standard deviation from normal is off the chart.... The Dweeber............:-) ----------------------------------------------------------------------------------------------------------------------------------------------------------------- Weather conditions have
- [Mammoth Mt closes July 4th for the ski season with an amazing year!.....Although June was one of the hottest on record for the Eastern Sierra....Somewhat Cooler than normal temperatures are on the way for the rest of July...The Monsoon looks weaker than normal for July....](https://mammothweather.com/2016/07/03/mammoth-mt-closes-july-4th-for-the-ski-season-with-an-amazing-year-although-june-was-one-of-the-hottest-on-record-for-the-eastern-sierra-somewhat-cooler-than-normal-temperatures-are-on-the-way/) - After a string of very warm days with temperatures some 10 to 15 degrees above normal, during the month of June, the forecast models are trending toward a much cooler month of July associated with west coast troughing in the mean. This will create a trend of breezier than normal afternoons and evenings along with high temperatures mostly
- [High pressure over the far west will gradually weaken the next week...Weak upper low will destabilize the air-mass over the Central Sierra for the chance of thunderstorms this afternoon and Saturday......Shift in the upper jet further south along the west coast next Wednesday will bring an end to the stretch of 80 degree days in Mammoth and 100 degrees days in Bishop....](https://mammothweather.com/2016/07/01/high-pressure-of-the-far-west-will-gradually-weaken-the-next-week-weak-upper-low-will-destabilize-the-air-mass-over-the-central-sierra-for-the-chance-of-thunderstorms-this-afternoon-and-saturday/) - Saturday AM: One small Vort center has moved on-shore near San Jose this morning, and will approach the sierra this afternoon. Scattered thunderstorms may develop today over Western Mono County, then shift off to the east later this afternoon. So the Town of Mammoth and June may have some rainfall today Saturday. (30%) chance. ]It
- [Stretch of very warm temperature's to continue in the high country as an Continental Upper high builds over 4 corners area again....Upper high is split with weak Col over Central CA....Widely scattered thunderstorms possible mid week....](https://mammothweather.com/2016/06/26/stretch-of-very-warm-temperatures-continue-in-the-high-country-as-continental-upper-high-builds-over-4-corners-area-again-upper-high-is-split-with-weak-col-over-central-ca-widely-scattered-thu/) - Wednesday Am Update: Very heavy rains fell in Mammoth during the mid afternoon hours Tuesday. An estimated .5 to an inch fell in town, most of which occurred within 1/2 hours. Todays atmosphere is certainly more moist as compared to yesterday morning, however, we do not have the upper dynamics or focusing mechanism like yesterday. So
- [Summer Heat Over Eastern California to Continue with Dry Weather and Above to Much Above Normal Temps Through the Middle of Next Week....Southwest Monsoon has begun....But will take time backing up over the Eastern Sierra](https://mammothweather.com/2016/06/24/summer-heat-over-eastern-california-to-continue-with-dry-weather-and-above-to-much-above-normal-temps-through-the-middle-of-next-week-southwest-monsoon-has-begun-but-will-take-time-backing-up-ov/) - The slight cooling has been welcomed here in Mammoth with highs now in the mid to upper 70s.....Purrr-fect! Checking on temps in the Bishop area, it hit 103 Thursday. So the string of 100+ degree days continue. It should be noted that if Bishop stays at or above the 100 degree mark the next couple of days...the
- [Summer shifts into high gear this week with highs in the low to mid 80s in Mammoth then mid to upper 70s 2nd half.....Last freeze of the cold season was last weekend....Feel free to plant.......](https://mammothweather.com/2016/06/19/summer-shifts-into-high-gear-this-week-with-highs-in-the-low-to-mid-80s-in-mammoth-then-mid-to-upper-70s-2nd-half-last-freeze-of-the-cold-season-was-last-weekend-feel-free-to-plant/) - Tuesday 5:45PM Update: The first day of Summer was quite the warm one with an even 80 here at the village at Mammoth and 105 in Bishop. Today Tuesday was a Redux with 80 again and again 105 in Bishop. An afternoon Mammoth zephyr picked up with gusts to 20 MPH......This took the edge off the
- [There will be a break between systems today with another full latitude Trof impacting the Eastern Sierra beginning Tuesday through much of this week.....So far it just looks windy...Heat to Return to the high county by weeks end with a scorcher expected for much of CA early next week.....](https://mammothweather.com/2016/06/13/there-will-be-a-break-between-systems-today-with-another-full-latitude-trof-impacting-the-eastern-sierra-beginning-thursday-through-much-of-this-week-so-far-it-just-looks-windy/) - Tuesday PM: The current strong trof impacting the west coast bringing snows to the Cascades, showers to Northern CA this Wednesday and Thursday, and strong gusty winds here in Mono County, will be the last of the winter of 2016. Both ECMWF and GFS has a very strong continental high with heights at 500MB over 600DM building over
- [Above normal temperatures to continue through mid week then a trof of low pressure will descend from the Gulf of Ak bringing breezy-cooler weather to the high country....beginning late Wednesday through the weekend.....](https://mammothweather.com/2016/06/07/above-normal-temperatures-to-continue-through-mid-week-then-a-trof-of-low-pressure-will-descend-from-the-gulf-of-ak-bringing-breezy-cooler-weather-to-the-high-country-beginning-late-wednesday-thro/) - Above normal temperatures will continue through tomorrow Wednesday with breezy weather starting Wednesday afternoon and then through Friday. The upper pattern over the pacific appears to be progressive with a series of low pressure systems headed for the west coast the next two weeks. Thus the idea of anymore heat waves in our future is not likely
- [Record or near record high temperatures on tap later this week as strong ridge for early June builds into the west coast.....Heat will break with thundershowers Sunday and Monday.....](https://mammothweather.com/2016/05/31/record-or-near-record-high-temperatures-on-tap-later-this-week-as-strong-ridge-for-early-june-builds-into-the-west-coast-heat-will-break-with-thundershowers-sunday-and-monday/) - Sunday AM Update: A weak upper low was located just NE of the Bay Area at Sunrise Sunday, proged to move ENE today. This is north of its earlier forecasted position. All of the Upper Divergence will be north of Mammoth Lakes today and so little in the way of dynamic forcing for thunderstorm's is expected south of Mono Lake. The forecast
- [The Chance of Showers and Thunderstorms return Saturday through Sunday with less of a chance on Memorial Day....A taste of Summer definitely in forecast by Tuesday though Friday next week...](https://mammothweather.com/2016/05/27/the-chance-of-showers-and-thunderstorms-return-saturday-through-sunday-with-less-of-a-chance-on-memorial-day-a-taste-of-summer-definitely-in-forecast-by-tuesday-though-friday-next-week/) - Saturday 2:00PM Weak deformation zone has set up over Mono County showing up on the 850MB. Light showers and some thunder so far in Mammoth with the snow level above 10K. Showers will trend further north with time...... Looking at the 00Z Saturday WRF.....the upper flow at the moment is light from the NW. A
- [Chilly Weekend to be followed by the potential of some significant snowfall Tuesday PM Through Wednesday AM......Cold Mid May adjustment wave over the far west is pretty much stationary through much of next week....The Dweebs will keep a weary eye on the Memorial Day holiday weekend......](https://mammothweather.com/2016/05/21/chilly-weekend-to-be-followed-by-the-potential-of-some-significant-snowfall-tuesday-pm-through-wednesday-am-cold-mid-may-adjustment-wave-over-the-far-west-is-pretty-much-stationary-through-much-o/) - Monday AM: A Broad Trof remains over the far west this week with the upper jet west-east across Paso Robles to DV. Thus Mammoth remains on the cyclonic side of the upper jet. Several impulses will move through the broad upper trof the next few days allowing Rain showers and snow showers to occur. Some
- [Expect a cool unsetteled week ahead with a slight chance of showers and thunder each period the next few days.....Temperatures will run below normal....As the Great Basin Upper Trof reloads and retrogrades....even more unsettled weather is expected over the weekend......](https://mammothweather.com/2016/05/16/a-cool-unsetteled-week-ahead-with-a-slight-chance-of-showers-and-thunder-each-period-the-next-few-days-temperatures-will-run-below-normal-as-the-great-basin-upper-trof-reloads-and-retrogrades/) - This mornings 5 day means from the ECMWF Control Ensembles showed a ridge at 140 west and a Trof in the mean over the Great Basin. A NW flow is occurring over CA with limited moisture. Strong Mid May daytime heating will destabilize the atmosphere enough for a "few" thunderstorms over Mono County. The track
- [Nice weather week ahead with the beginning of the week offering seasonal temperatures, then above normal temps for Thursday and Friday......The weekend looks partly cloudy, breezy and slightly cooler.....Next significant upper low to effect the high country about the middle of next week.....](https://mammothweather.com/2016/05/09/nice-weather-week-ahead-with-the-beginning-of-the-week-seasonal-temperatures-and-then-above-normal-temps-for-thursday-and-friday-the-weekend-looks-partly-cloudy-breezy-and-slightly-cooler-ne/) - Tuesday AM: Forecast on track with a little cooler day today. Some of the cooler air that dropped out of Western Canada last night will spread into the Great Basin, building surface pressures and providing for a gentle NE/SW gradient. Any clouds that develop this afternoon are due to some marginal instability that will blow
- [Active pattern will continue through the 1st week of May with several weather systems affecting the Eastern Sierra](https://mammothweather.com/2016/04/29/active-pattern-will-continue-through-the-1st-week-of-may-with-several-weather-systems-affecting-the-eastern-sierra/) - Although we will have a nice break in the weather today Friday the 29th, a strong for April, back door cold front will sweep through Eastern CA Saturday morning. The system will have a strong North/South gradient, especially within the front itself. Moderate north winds in north prone wind areas can be expected with light snowfall along with colder
- [Weather pattern will return to an active one for Mid Spring...with Wind....Rain/Snow and cooler weather......This pattern will likely continue into month's end.....](https://mammothweather.com/2016/04/21/weather-pattern-will-return-to-an-active-one-for-mid-spring-with-wind-rainsnow-and-cooler-weather-this-pattern-will-likely-continue-into-months-end/) - Today Madness is all about the upper low that may dig back into So-Cal for the weekend..... The Dweebs need another day or even two to call it. An upper level low that digs back into Southern Ca would bring light snow to the high country and gusty NE winds over the weekend. But the
- [Windy NW Slider will Morph into an inside slider with secondary upper jet...It will be windy and cooler the next few days......Strong Ridging building in over the weekend will bring a return to above normal temperatures Sunday through Wednesday.......We're not quite done with the wet season yet as longer range charts showing a system about the 22nd with the last week of April potentially going out like a lion........Most importantly was Scripps Winter Forecast for a Record Smashing La Nina in 2017!!!](https://mammothweather.com/2016/04/14/windy-nw-slider-will-morph-into-an-inside-slider-with-secondary-upper-jet-it-will-be-windy-and-cooler-the-next-few-days-strong-ridging-building-in-over-the-weekend-will-bring-a-return-to-above/) - Monday PM: The Dweebs took a look at both the 12z ECMWF and 18Z GFS Ensembles this afternoon. The EC is certainly wetter as it forms a Closed low near the Bay Area and Moves it through South Central CA. The GFS looks pretty Dry as the storm splits south down the coast to LA. The
- [Sunday Afternoon's Analysis over CA showed weak cyclonic circulation over the interior of Southern CA with scattered mainly light shower action......Over developed conditions of extensive cloudiness over Southern Mono County leads to the unlikelihood of significant precip today unless we get some surface heating....](https://mammothweather.com/2016/04/10/sunday-afternoons-analysis-over-ca-showed-weak-cyclonic-circulation-over-the-interior-of-southern-ca-with-scattered-mainly-light-shower-action-over-developed-conditions-of-extensive-cloudiness/) - The main action this afternoon is confined to the more dynamic area of Arizona, that is just north of the upper jet crossing Baja along with the weakening cyclonic flow over interior Southern CA. There is strong upper divergence in that area. We are definitely into hybrid forecasting today with both dynamic forcing type conditions to the Southeast and
- [Moisture Surge from the south in process but little in the way of lift over Eastern CA today.....Instability should increase with time later today and tonight....](https://mammothweather.com/2016/04/08/moisture-surge-from-the-south-in-process-but-little-in-the-way-of-lift-over-eastern-ca-today-instability-should-increase-with-time-later-today-and-tonight/) - Radar is showing light returns over Southern Inyo Country late this AM, but little instability is over the eastern central CA ATM. Latest guidance at 250MB on the 12z NGM and GFS has good upper divergence over the central sierra late today and tonight. CAPE is expected to increase over the crest this afternoon to 250 J/KG. So well see
- [Strong Upper Height Blocking over the Pacific NW and Western Canada will force undercutting of the westerlies the next few weeks.....Bringing good Central and Southern Sierra Snows and colder than normal temps to the high country....](https://mammothweather.com/2016/04/06/strong-upper-height-blocking-over-the-pacific-nw-to-western-canada-will-force-undercutting-of-the-westerlies-the-next-few-weeks-bringing-good-central-and-southern-snows-and-colder-then-normal-temp/) - The Dweebs this morning like the way the pattern is shaping up the next few weeks with good potential of beneficial rains and snow in the high country for the southern 2/3rds of the state. Medium Range forecasts and long-range outlooks show a strong for Mid April, belt of Westerlies carrying a series of closed lows
- [Beautiful Spring weekend shaping up with mild temps and light winds......The Last Gasp of EL Nino is on its way!......................](https://mammothweather.com/2016/04/01/beautiful-spring-weekend-shaping-up-with-mild-temps-and-light-winds-the-last-gasp-of-el-nino-is-on-its-way/) - Monday Afternoon: No changes to the Dweebs Outlook with high latitude blocking increasing in the PNA region with time. The northern part of the trof that split last night is headed east into the Rockies today, while the bottom part of the split will spin up off the coast of Baja, MX this week. To the north of
- [Cold Upper Low over CA today will bring gusty winds and a band of light snow through Mono County later this afternoon into this Evening....Unsettled weather to continue through Wednesday then fair and warmer Thursday through the weekend....](https://mammothweather.com/2016/03/28/cold-upper-low-over-ca-today-bring-gusty-winds-and-a-band-of-light-snow-through-mono-county-later-this-afternoon-into-this-evening-unsettled-weather-to-continue-through-wednesday-then-fair-and-war/) - Thursday AM: SST are really cooling along the west coast south to Pt. Conception as EL Nino Fades... This means that coastal sections from Northern Ca south to Southern CA will have much more of a June Gloom season over the next few years..... Tuesday PM; Longer Range Update: From the briefing from the
- [After a lull.....Upper pattern to become active again with a Cold Spring Trof setting up over the Great Basin...](https://mammothweather.com/2016/03/24/after-a-lull-upper-pattern-to-become-active-again-with-a-cold-spring-trof-setting-up-over-the-great-basin/) - Easter Sunday: QPF 1 to 4 inches....by Wednesday.... ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Like the Headline? Here are the points of interest: The Nino Basin is still in the moderate to strong El Nino Range. 16 MAR 2016 27.5 1.0 28.8 1.7 28.9 1.7 29.6 1.42 The Climate models have been touting a wetter pattern for April for sometime.
- [Mondays Storm dropped between 4 and 7 inches on Mammoth Mt with Blustery Weather expected for Tuesday/Ngt....Then fair and warmer Wednesday through Sunday......March goes out as Closed Low Season Begins in April.....](https://mammothweather.com/2016/03/22/mondays-storm-drops-between-4-and-7-inches-on-mammoth-mt-with-blustry-weathger-expected-for-tuesday-then-fair-and-warmer-wednesday-through-sunday-march-goes-out-as-closed-low-season-begins-and-co/) - update this evening: 3/24/16 ---------------------------------------- It was a nice little storm that rolled into Mammoth late Monday afternoon. Gusty winds and moderate snow showers were in full force by 6:30PM. The snow that was falling was definitely of the convective nature. The popcorn snow pellet type hydrometeor, common in the springtime! At Mammothweather.com near the Village at
- [Winter to go out like Spring and Spring to come in like Winter!  Don't give up on more snowfall for the Eastern Sierra Just yet.....April should bring plenty!](https://mammothweather.com/2016/03/18/winter-to-go-out-like-spring-and-spring-to-come-in-like-winter-dont-give-up-on-more-snowfall-for-the-eastern-sierra-just-yet-as-april-should-bring-plenty/) - Wind Advisories are hoisted for travelers today for both Mono and Inyo County's beginning at 11:00AM Monday AM: The first of two cold fronts are moving through Central CA bringing mainly wind and cooling. Some light snow shower action may happen this afternoon, however, the main snowfall potential will be with the 2nd cold
- [Upper ridge building and upper jet headed further north....Dry weather expected through Sunday.....Chance of a moderate storm Monday.....](https://mammothweather.com/2016/03/15/upper-ridge-building-and-upper-jet-headed-further-north-dry-weather-expected-through-sunday-chance-of-a-moderate-storm-monday/) - Upper level winds continue to diminish as the upper jet now over Oregon, lifts north into Canada by Friday. Although a short wave Trof may bring some high clouds later today and a slight increase of wind over the Crest....The upper jet will be too far to the north by Wednesday and Thursday for any
- [A Fair Weather Upper Ridge develops by Mid Week....Expect an end to the Windy Weather for a 5 day period....Upper Jet Makes a return to Northern CA by Sunday Night......The forecast for Mammoth includes a dry period beginning Tuesday through the end of this week....](https://mammothweather.com/2016/03/14/a-fair-weather-upper-ridge-develops-by-mid-week-expect-an-end-to-the-windy-weather-for-a-5-day-period-upper-jet-makes-a-return-to-northern-ca-by-sunday-night-the-forecast-for-mammoth-includ/) - As the East Asian Jet retreats....strong height rises continue to be expected this week for California, as the upper jet lifts north into Canada by Mid-Week. Upper level winds will be very light by Wednesday and subsidence will warm daytime highs over Mammoth to near 60 by Saturday. By Sunday, the pattern becomes a bit progressive again and
- [Last in the Series of storms hit the sierra this weekend...then a nice break next week..........................](https://mammothweather.com/2016/03/11/8512/) - Friday AM: Changes in the weather pattern across the far eastern pacific and downstream are becoming less conducive for storminess over the next week. The East Asian Upper Jet stream is weakening as the main area of tropical forcing along the equator weakens and redevelops over the Indian ocean. The immediate effects in the next
- [Mammoth Mt picked up another 8 inches over the past 24 hours...a nice break today with unsettled weather returning late tonight and into early Wednesday.....Another Major Storm Expected by the end of this week....Storm Door to Close During the 2nd half of next week....](https://mammothweather.com/2016/03/08/mammoth-mt-picked-up-another-8-inches-over-the-past-24-hours-a-nice-break-today-with-unsettled-weather-returning-late-tonight-and-into-early-wednesday-another-major-storm-expected-by-the-end-of/) - Wednesday AM: All forecast models are back peddling a bit on the QPF between Today and next Tuesday indicating about a 4 inch Bull's-eye over Mammoth. That means that we could see between 3 AND 4 FEET OF SNOW BY NEXT Tuesday. The AR forecasted for early next week looks much weaker in the models
- [Between 4 and 5 feet reported on Mammoth Mt with a couple of feet in town....The next system rolls in later tonight with more sunshine expected by late Monday AM into the afternoon.....Snow showers expected Monday PM.....](https://mammothweather.com/2016/03/06/between-4-and-5-feet-reported-on-mammoth-mt-with-a-couple-of-feet-in-town-the-next-system-rolls-in-later-tonight-with-more-sunshine-expected-by-late-monday-am-into-the-afternoon-snow-showers-ex/) - Monday AM: Upper jet diving south toward Baja this morning as upper low slows and slides SE. The Dweebs have seen this scenario before. Essentially, this storm will not come through the sierra. Rather...it digs south into BAJA, Mexico. Coastal sections of California will likely get the lions share of precipitation while east of the
- [Well Connected Atmospheric River stretches back to Asia as first major upper low moves in later today.....Winter Storm Warning hoisted for tonight through 10:00AM Monday Morning......2-1/2 feet possible for the town of Mammoth by Monday PM and 4 feet + Mammoth Mtn by Monday PM.......Storm Door to remain open in the 6 to 10 day period with a good storm every 3 to 4 days.......](https://mammothweather.com/2016/03/05/well-connected-atmospheric-river-stretches-back-to-asia-as-first-major-upper-low-moved-in-today-winter-storm-warning-moisted-for-tonight-through-1000am-monday-morning-2-12-feet-possible-for/) - It's almost ShowTime as an area of strong (UVM) "Upward Vertical Motion" moves in by 10:00PM tonight. The FOUS data for Fresno shows UVM increasing to a +28 by 10:00PM tonight packing the dendritic growth zone with more then it can handle. 500MB- 1000mb thicknesses fall from 554 DM to 542DM within 6 hours as the cold
- [East Asian Jet Extension well in the models now with Best Storm Cycle probabilities for the Winter of 2016....AR Event Saturday PM to supply plenty of juice for the Pump....](https://mammothweather.com/2016/03/03/east-asian-jet-extension-well-in-the-models-now-with-best-storm-cycle-probabilities-for-the-winter-of-2016-ar-event-saturday-pm-to-supply-plenty-of-juice-for-the-pump/) - Saturday AM: This will be brief with a more detailed update later today: Looking at the all the guidance, and if it is correct....we are going into one protracted storm cycle that may rival the "Miracle March" of 1991..... over a 15 day period..... More details later today.... ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The Dweebs have been
- [After a dry 3 to 5 day period....some light snowfall is possible by Thursday.....Pattern transiting to Active...The 2nd week of March enters strong storm cycle with potential significant AR event in addition to several storms......The Dweebs see "The Potential" of 100+ inches of snowfall During weeks 2 and 3 of March.....](https://mammothweather.com/2016/02/27/after-a-dry-3-to-5-day-period-some-light-snowfall-is-possible-by-thursday-pattern-transiting-to-active-the-2nd-week-of-march-with-potential-significant-ar-event-then/) - Thursday Night.... Working on it..................! Sunday: Some light rain/snow mix is expected in town Thursday with possibly an inch or two above 9000 feet. It will be cooler and breezy Thursday. It appears that a decent storm cycle is possible to begin later next weekend, then on and off again with several storms
- [After a Beautiful Day Thursday.....Breezy, Partly Cloudy Conditions Expected Friday...Then a bit cooler Saturday and Sunday with Breezy Weather at times.....Upper ridge returns early next week.....](https://mammothweather.com/2016/02/25/after-a-beautiful-day-thursday-breezy-partly-cloudy-conditions-expected-friday-then-a-bit-cooler-saturday-and-sunday-with-breezy-weather-at-times-upper-ridge-returns-early-next-week/) - Ridge over the far west will weaken a bit after today, allowing a few short waves to bring some clouds, some cooling as well as breezy weather to the high country over the weekend. Daytime highs will still range in the low 50s Saturday and Sunday in town, with lows in the 20s. Winds will gust
- [Flat Ridge over California is amplifying just off shore creating NW wind over the crest and an increasing North-South surface gradient.....Thus it will be a cooler day today....Then Warming into the rest of the Week...Check the updates for the next significant storm....](https://mammothweather.com/2016/02/22/flat-ridge-over-california-is-amplifying-just-off-shore-creating-nw-wind-over-the-crest-and-an-increasing-north-south-surface-gradient-thus-it-will-be-a-cooler-day-today-then-warming-into-the-r/) - Wednesday AM: The Dweebs had a look at the updated MJO phase spaces this AM.. Remarkably, both the GFS and the ECMWF are consistent in going their different ways . The MJO in its strength and ability to traverse through phase 8 is critical to the southern branch, its strength and persistence in undercutting of the west coast ridge next
- [Winter Storm Warning Now Hoisted by the NWS beginning 7:00PM Wednesday through 12:00PM Friday....Expect a dry.....Partly cloudy and breezy weekend](https://mammothweather.com/2016/02/16/winter-storm-warning-has-been-hoisted-by-the-nws-beginning-700pm-wednesday-through/) - A WINTER STORM WARNING NOW HOISTED FROM THE NWS Wednesday from 7:00PM to 12:00PM Thursday.... SEE: http://forecast.weather.gov/showsigwx.php?warnzone=CAZ073&warncounty=CAC051&firewxzone=CAZ273&local_place1=13%20Miles%20E%20Lee%20Vining%20CA&product1=Winter+Storm+Warning&lat=37.939&lon=-118.887#.VsNppbQrKig 9:00AM Tuesday: Although the Wed/Thur storm system is on track to bring a good foot to the town at 8000 feet and between 18 and 24 inches over the higher elevations; there is a substantial warm sector that will have
- [Upper ridge to build and progress over California Today and Tuesday.....Warmer days expected.....Midweek Storm a Fickle One.....Now includes a Subtropical Tap.....Snowfall amounts increased for Wednesday Night and Thursday AM......It looks to be a windy one as well.....](https://mammothweather.com/2016/02/15/upper-ridge-to-build-and-progress-over-california-today-and-tuesday-warmer-days-expected-midweek-storm-a-fickle-one-now-includes-a-subtropical-tap-snowfall-amounts-increased-for-wednesda/) - After a couple of mild days early this week.....The Dweebs have seen more model consensus indicating a substantial subtropical moisture tap, that increases the QPF from moderate to now possibly heavy on Mammoth Mountain Wednesday night and Thursday. Overall, snowfall amounts will be determined by how quickly the short wave moves through. Both EC and GFS are showing a nice
- [Upper West Coast Ridge will weaken this weekend then redevelop off shore and build over CA early next week.....Mid Week storm looks to be a moderate one with no Subtropical Tap....](https://mammothweather.com/2016/02/13/upper-west-coast-ridge-will-weaken-this-weekend-then-redevelop-off-shore-and-build-over-ca-early-next-week-mid-week-storm-looks-to-be-a-moderate-one-with-no-subtropical-tap/) - Saturday AM: Clearing skies were in process this morning and temperatures were running a few degrees cooler. North winds will be on the increase later in the weekend and into early next week as the west coast upper ridge redevelops over the far eastern pacific and builds over California Monday into Tuesday. As the Dweebs have
- [Omega Block in Place with highly Amped Upper Ridge over California.....February Thaw in Process....Mammoth Mountain Boasts 9 to 14 Foot Base!!](https://mammothweather.com/2016/02/08/omega-block-in-place-with-highly-amped-upper-ridge-over-california-february-thaw-in-process-mammoth-mountain-boasts-9-to-14-foot-base/) - Friday PM: No surprises this weekend....The Dweebs are still working out the QPF for the mid-week storm....Will have a final on that most likely later Sunday AM on my "Plat Powder Email".....when both GFS and EC come into better agreement..... Thursday AM: Fair partly and mild through Tuesday......highs in the 50s....Lows in the 20
- [East Asian Upper Jet continues to Retreat westward over the pacific with Omega Block setting up this weekend with Upper Ridge building over California......](https://mammothweather.com/2016/02/05/east-asian-upper-jet-continues-to-retreat-westward-over-the-pacific-with-omega-block-setting-up-this-weekend-with-upper-ridge-building-over-california/) - Saturday AM: Forecasted warming by models for Mammoth: +7 degrees of warming Saturday (47); and another +1 for Sunday (48), +3 for Monday (51) and +6 for Tuesday (57). Thereafter, a very slow cool down into the following weekend. Lows in the teens and 20s....then low 30s by early next week at 8K. Winds over the crest
- [Partly Cloudy Unsettled Weather to give way to Sunshine and Warmer Temperatures Friday well into Mid-Week as Pattern Shift gives California a Dry Spell through at least mid-month.......](https://mammothweather.com/2016/02/02/partly-cloudy-unsettled-weather-to-give-way-to-sunshine-and-warmer-temperatures-friday-into-mid-month-as-pattern-shift-gives-california-a-dry-spell-through-at-least-mid-month/) - Tuesday AM Update: Only comments to the forecast is in the outlook. The Dweebs had a look at the reanalysis charts and focused on February of 1951 in which a similar upper ridge developed for a week, bringing record high temps to many areas of CA. The Record for Bishop is 78 degree for the 10th
- [Cold Northerly Flow will continue through tonight with upslope cloudiness and a few flurries or snow showers Monday.....An Inside slider will bring the chance of snow showers Tuesday and weak system late Wednesday before the off shore ridge builds along the coast Friday into the weekend....It will be milder over the weekend....](https://mammothweather.com/2016/02/01/cold-northerly-flow-will-continue-through-tonight-with-upslope-cloudiness-and-a-few-flurries-or-snow-showers-monday-a-few-inside-sliders-will-bring-the-chance-of-snow-showers-tuesday-and-again-lat/) - The Weekend Storm brought over two feet to the Village at Mammoth last weekend and between 3 and 4.5 feet to Mammoth Mountain. Today's weathers is highlighted by the exiting storm over the Great Basin into the Central Rockies and a highly amplified upper ridge off shore providing a North South gradient to eastern California.
- [Snowfall to Continue Today and Tonight for the Eastern Sierra, Mono County and the Owens Valley.... Winter Storm Warning is in effect thru 4:00AM Monday....](https://mammothweather.com/2016/01/31/snowfall-to-continue-today-and-tonight-for-the-eastern-sierra-mono-county-and-the-owens-valley-winter-storm-warning-is-in-effect-thru-400am-monday/) - 6:00PM Sunday Platinum Powder Alert for Tonight for snowfall Ratios 18:1 with up to a Foot on Mammoth Mtn over night.....Tonopah Low to remain stationary through 2:00AM Monday morning before ejecting NE toward Utah....Snowfall rates 1 to 2 inches an hour tonight... Storm total on Mammoth Mtn 3 to 5 feet by Morning..... -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 4:00PM Update A
- [Winter Storm Warning Hoisted for Mono County beginning at 4:00PM Friday to 4:00PM Saturday....Storm to possibly last through Sunday night....](https://mammothweather.com/2016/01/28/winter-storm-warning-hoisted-for-mono-county-beginning-at-400pm-friday-to-400pm-saturday-storm-to-possibly-last-through-sunday-night/) - Friday AM; Brief update shows the snow level remaining at and above 9K today and tonight with accumulating snow after midnight tonight in the Town of Mammoth. Totals of 1 to 2 feet in the residential areas of town by Sunday night and 2 to 3+ feet on Mammoth Mt by Monday AM PS; it
- [Atmospheric River now Showing up off shore...Moisture to really increase Friday ahead of Heavy Snowfall Saturday AM.....](https://mammothweather.com/2016/01/28/atmospheric-river-now-showing-up-off-shore-moisture-to-really-increase-friday-ahead-of-heavy-snowfall-saturday-am/) - High Wind watches have been hoisted by the NWS for Friday and Friday Night as the nose of a 170 Knot upper jet makes its way east into the Sierra. Snow levels will begin high as the Freezing level reaches 10K Friday. The snow level will likely be about 9,000 Friday/Night then gradually lower late
- [Upper Ridge at Peak today with some weakening Wednesday into Thursday.......Weekend still looks good for more Snowfall...](https://mammothweather.com/2016/01/26/upper-ridge-at-peak-today-with-some-weakening-wednesday-into-thursday-weekend-still-looks-good-for-more-snowfall/) - 5:30PM Wednesday We are still looking at a 2 to 3 foot snow storm for the crest and 12" + town storm total by Sunday night. 2:50PM Wednesday: El Nino: "EL Nino Loco"... Yes the crazy boy child.....One that is driving many crazy! You've seen it first right here! I am starting to see
- [Beautiful Break in the weather this upcoming week through Mid-Day Friday......Will Snowmageddon Hit the Central Sierra Friday Night Through>>>>????](https://mammothweather.com/2016/01/24/beautiful-break-in-the-weather-this-upcoming-week-through-mid-day-friday-will-snowmageddon-hit-the-central-sierra-friday-night-through/) - Fair weather with warmer temps will be the trend through Mid week.......High temps Sunday and Monday will be in the 30s then 40s Tuesday through Friday..... Lows at night into the teens and 20s.... Sierra Crest winds were light this morning and pick up some this afternoon and night. However, for the lower slopes, lights
- [Nor'easter taking the punch out of the west coast system by forcing some splitting of the upper flow over the sierra......A period of Moderate to Heavy Snowfall is expected later tonight into Saturday then Fair Sunday through Thursday........](https://mammothweather.com/2016/01/22/noreaster-taking-the-punch-out-of-the-west-coast-system-by-forcing-split-flow-over-the-sierra-a-period-of-moderate-to-heavy-snowfall-is-expected-later-tonight-into-saturday-then-fair-sunday-thr/) - The last in the series of storms is expected to bring a period of moderate to heavy snowfall tonight. Unfortunately, the timing of our west coast storm could not be worse as it will be running into the back pressure of the east coast Nor'easter that is spinning up at the moment. This shorter wavelength will act to
- [Last in the series of storms to make its way into Central CA....Friday AM with a 1-2 punch....Weather prediction center expecting between 2 and 3 inches of QPF for the Central Sierra......Nice break in the weather coming up Sunday or Monday through Thursday next week......](https://mammothweather.com/2016/01/21/last-in-the-series-of-storms-to-make-its-way-into-central-ca-friday-am-with-a-1-2-punch-weather-prediction-center-expecting-between-2-and-3-inches-of-qpf-for-the-central-sierra-nice-break-i/) - Thursday PM: Latest Jan 00z 22 Update QPF from "WPC", for the Sierra is about 2.25 inches around Mammoth with a 3.34 bulls Eye about 60 miles NW of the Mammoth Crest. This updated QPF suggests that two combined systems will produce less than this mornings update. Latest models are showing some splitting of the
- [The march of weather systems to continue into Saturday AM with a break Saturday PM thru Mid Week......](https://mammothweather.com/2016/01/19/the-march-of-weather-systems-to-continue-into-saturday-am-with-a-break-saturday-pm-thru-mid-week/) - My Son Clifford reported heavy rain in Mt View in the Bay Area, between 8:00am and 9:00Am this morning, including a nasty traffic accident involving a Greyhound Bus. The back of this particular storm is currently moving on shore over the Bay Area and should be through Mammoth by this evening... California Rivers QPF has
- [Weather Pattern has once again turned active in the high country with periods of light to moderate snow this weekend.......Then a Potential AR Event Late Sunday Night though Tuesday....](https://mammothweather.com/2016/01/14/weather-pattern-has-once-again-turned-active-in-the-high-country-with-periods-of-light-to-moderate-snow-this-weekend-then-a-potential-ar-event-late-sunday-night-though-tuesday/) - Sunday 7:45 AM Although the focus of the "AR" will be over Northern CA this Coming Week...Mammoth Mt could still pick up 18 to 24 inches of wet snow between Tonight and Tuesday evening..... These are two storms back to back that are each moderate precipitation producing storms. There will be a break Wednesday and Thursday
- [Ridge in the west....Cold Trof in the East to give two more nice days before weather turns unsettled again by Wednesday.....Then thereafter for another week....](https://mammothweather.com/2016/01/11/ridge-in-the-west-cold-trof-in-the-east-to-give-two-more-nice-days-before-weather-turns-unsettled-again-by-wednesday-then-thereafter-for-another-week/) - If you saw the Minnesota game Sunday then you know that there was a Cold Air invasion from Canada over the weekend. The Cold has advanced SE and is part of a slowly progressive long wave trof over the Eastern US. Chances are good that if this was not a strong El Nino Winter, that
- [Cold Trof developing over the east will set up over the next 5 to 7 days forcing the West Coast Ridge to build as well....Expect small systems to bring mainly light amounts of snowfall through next Friday.......](https://mammothweather.com/2016/01/08/cold-trof-developing-over-the-east-will-set-up-over-the-east-the-next-5-to-7-day-forcing-west-coast-ridge-to-build-as-well-expect-small-system-to-bring-light-amounts-of-snowfall-the-through-next-fr/) - Friday the 8th: Current conditions...Light snow showers.. Weak impulses from the back side of the storm that moved through Thursday Am will produce unstable air and some snow showers today. Little if any accumulation is expected today. Highs today in the 20s.... Lows tonight in the teens.... There is another small system coming in late
- [Another 12 to 18 inches has fallen the past 24 hours on Mammoth Mt bringing Snow Totals over the crest to around 4 feet.....Although no major storms on the horizon....There will be additional snowfall into next week....Some very interesting development's coming up in the long range.....](https://mammothweather.com/2016/01/07/another-12-to-18-inches-has-fallen-the-past-24-hours-on-mammoth-mt-bringing-snow-totals-over-the-crest-to-around-4-feet-although-no-major-storms-on-the-horizon-there-will-be-additional-snowfall/) - Another good snowfall over the past 24 hours in Mammoth with approximately 12 to 18 inches of new over Mammoth Mt and some 4 to 8 inches in town. These were not the totals we expected, as much of the storms energy remained off the coast then inland over Southern California, El Nino Style..... Once again we are seeing
- [Long Awaited El Nino/MJO Forced Storm Cycle has finally Developed after a 6 months wait.........Southern Stream energy gets ready to deliver......](https://mammothweather.com/2016/01/04/long-awaited-el-ninomjo-forced-storm-cycle-has-finally-developed-after-a-6-months-wait-as-southern-stream-energy-get-ready-to-deliver/) - WINTER WEATHER ADVISORY IS IN EFFECT FROM 10:00 AM WEDNESDAY MORNING THROUGH 4:00AM THURSDAY...... AREAS ALONG HIGHWAY 395 SOUTH OF MONO LAKE MAY EXPERIENCE WINTER STORM WARNING CRITERIA INTO EARLY THURSDAY AM.... Tuesday 1:00PM Some interesting possibilities for week two. (Wednesday through Tuesday the 20th). The Dweebs are looking at both the MJO phase space forecasts from the GFS (American
- [Happy New Year from the Dweebs!!!!  And may it be a wet one.....Last 2015 post.....](https://mammothweather.com/2015/12/30/happy-new-year-from-the-dweebs-and-may-it-be-a-wet-one-last-2015-post/) - The weather over the next few days will be pretty quiet. The Dweebs expect colder than normal temps that will moderate a bit by the end of this week. Highs this week will vary between the 20s and 30s with lows in the single digits and teens for the most part. I am expecting dry weather through Sunday with
- [Last Storm of 2015 to move in Monday morning with 1 to 3 inches of snow in town by Tuesday and 3 to 5 inches over the upper elevations.....This system will bring more cold snow to the high country and leave another Chilly Air-Mass in its wake....After a break in the action Wednesday through the News Years weekend...Long awaited ENSO/MJO induced Southern Stream energy sets up for Southern California during the first week of January as the pacific NW goes dry.....](https://mammothweather.com/2015/12/27/last-storm-of-2015-to-move-in-monday-morning-with-2-to-3-inches-of-snow-in-town-by-tuesday-and-3-to-5-inches-over-the-upper-elevations-this-system-will-bring-more-cold-snow-to-the-high-country-and-l/) - Monday AM: Note: Both EC and GFS are flirting with a westward digging small feature from the Great Basin forming a Tonopah Low & synoptic scale (REX BLOCK) over the New Years Holiday "Weekend"......This is something that will have to be watched. Although the current forecast does not reflect any precip for the holiday weekend....it
- [Mammoth Mt Reports 14 to 30 inches of the lightest powder in years!!  Snowshowers are expected this afternoon then Fair Saturday and warmer Sunday......](https://mammothweather.com/2015/12/25/mammoth-mt-reports-14-to-30-inches-of-the-lightest-powder-in-years-snowshowers-are-expected-this-afternoon-then-fair-saturday-and-warmer-sunday/) - Saturday PM: Monday's weak storm is expected to bring 1 to 3 inches with possibly another inch or so blown in up in saddle bowl. Once again the snow to water ratios will be high.... Saturday AM: Although we have another small system that may bring a few more inches to the high country
- [Winter Storm Warning Hoisted for Mono County for 10:00am Christmas Eve To 4:00am Christmas Day.....1 to 2 Feet Expected....Platinum Powder Alert for Christmas Eve into Christmas Day....MJO Continues on the Move](https://mammothweather.com/2015/12/22/winter-storm-warning-hoisted-for-mono-county-for-1000am-christmas-eve-to-400am-christmas-day/) - Christmas Eve: QPF has been updated to reflect 12 to 24 inch amounts from this Powder Hound by Morning... Very cold the next 2 days............. Nice gift under the trees..... Ho Ho Ho.... Some light snow possible Monday...............Then dry through the end of the year................. ------------------------------------------------------------------------------------------ Wednesday 12/23/19 - 8:30AM Update: Latest QPF forecast
- [Wet Pattern to continue through Tuesday afternoon with very significant precipitation Totals for the west side and sierra crest.....much colder system to quickly move through Christmas Eve......MJO is making all the right moves!](https://mammothweather.com/2015/12/21/wet-pattern-to-continue-through-tuesday-afternoon-with-very-significant-precipitation-totalsfor-the-west-side-and-sierra-crest-much-colder-system-to-quickly-move-through-christmas-eve-mjo-is/) - Tuesday: 10:20AM Mammoth Moutain picked up 2 to 3 feet of wet snow..... A break Wednesday withy breezy conditions and cooler then a Platinum Powder snowfall Thursday and Thursday Night.... Update at 12:00PM ---------------------------------------------------------------- 8:15PM Monday: Were doing really Well! temperature now 31 degrees at 8200 foot; CRFC just updated with 4.00 of QPF for Yosemite
- [Small Storm Now Affecting the Sierra with light snowfall and gusty winds......The current active weather pattern will likely continue though Christmas Day......](https://mammothweather.com/2015/12/19/small-storm-now-effecting-the-sierra-with-light-snowfall-and-gusty-winds-the-current-active-weather-pattern-will-likely-continue-though-christmas-day/) - Sunday Afternoon.....Low and behold..... It just may be showing up in the longest range of the EC and GFS the pattern that we have been waiting for....End of the first week of January. Sunday AM: Mammoth Mountain Reports 6 to 8 inches of new... Best 'Night of Light's' Ever at Canyon Lodge Last Night!!
- [Very Cold Temperatures to continue another day or two before some Moderation occurs prior to Weekend.....Next system becoming less Impressive for Southern Ca...However.....Some moderate amounts still possible.......Hemispheric Pattern still evolving....With the best for Precipitation not all that far off for Central and Eventually Southern California....](https://mammothweather.com/2015/12/15/very-cold-temperatures-to-continue-another-day-or-two-before-some-moderation-occurs-prior-to-weekend-next-system-becoming-less-impressive-for-southern-ca-however-some-moderate-amounts-still/) - Friday: To make this quick forecast seem on track with a little more west ward track to upper track. Snowfall estimates... 4 to 7 in town and 7 to 12 on Mammoth Mountain between Saturday AM and Saturday Night. Wednesday AM: Moderating temps up into the 40s Thursday and Friday. Dry through Friday Light breezes....
- [First in a Series of Storms has moved into Mono County.....First two systems will bring at least 3 to 4 feet by Monday afternoon over the higher elevations as Skiing conditions shift into high gear.........Temperatures to really plunge next Tuesday into Wednesday.....](https://mammothweather.com/2015/12/10/first-in-a-series-of-storms-has-moved-into-mono-county-first-two-systems-will-bring-at-least-3-to-4-feet-by-monday-afternoon-over-the-higher-elevations-as-skiing-conditions-shift-into-high-gear/) - Sunday 10:15 AM... Snow began to fall in Mammoth shortly before 10:00 AM Sunday 9:00AM: RE: Southern California WX On the 5th of December, the Dweebs brought all our readers the awareness to a change in the WX pattern for Southern California. The ECMWF indicated a major shift in the long wave Eastern Pacific Ridge westward to
- [A Transition to a Very Active Pattern by Mid Week is Expected as the nose of a 180 Knot Upper Jet extends to Northern CA by Mid Week......Multiple systems are expected periodically for the Northern and Central Sierra......](https://mammothweather.com/2015/12/05/a-transition-to-a-very-active-pattern-by-mid-week-is-expected-as-a-180-knot-upper-jet-extends-to-northern-ca-by-mid-week-multiple-systems-are-expected-periodically-for-the-northern-and-central-si/) - Wednesday AM: I have had a lot inquires in regards and concerns about when will the big rains will come to Southern California. The Dweebs want you to know that we are watching the models carefully for signs of when that may begin. The new GEFS has been implemented and it a beauty! It's like buying
- [Meteorological  Winter Arrives Today Dec 1 as a Weak Winter Storm Moves in Late Thursday.....SOI CRASHING LIKE 1997!.......](https://mammothweather.com/2015/12/01/meteorological-winter-arrives-today-dec-1-as-a-weak-winter-storm-moves-in-late-thursday/) - 12:37am Friday: The Storm System is a QPF bust in Mono County. It brought little more than an inch at the main lodge and up to 2 inches over the crest. Late this afternoon the HRRR had the right idea all along but the Dweebs focused on the QPF of the other models. We will relay more on the
- [Happy Thanksgiving Everyone from the Dweebs!.....Snow showers likely to continue for the next few days as cyclonic upper flow continues.....Light Accumulation's Expected.........](https://mammothweather.com/2015/11/26/happy-thanksgiving-everyone-from-the-dweebs-snow-showers-likely-to-continue-for-the-next-few-days-as-cyclonic-upper-flow-continues-light-accumulations-expected/) - Saturday 6:30AM Baby its cold outside...2 degrees! the high today will again be in the low 20s! Low 30s seem more likely for Sunday and low 40s by Tuesday.... It appears that our cold Great Basin Low will hang around one more day before departing Sunday. More Scattered snow showers are possible today with little
- [Cold Winter Like Storm Now moving into the Sierra with modified Arctic Air and moderate amounts of snowfall expected.....Heaviest snow fall expected between 4:00PM and 10:00PM Tonight.....Cold weather to continue most of the week....](https://mammothweather.com/2015/11/24/cold-winter-like-storm-now-moving-int-the-sierra-with-modified-airtic-air-and-and-moderate-amounts-of-snowfall-expected-heaviest-snow-fall-expected-between-400pm-and-1000pm-tonight-cold-weat/) - Wednesday AM Update: As of 10:10 AM, 6 to 12 inches has fallen on Mammoth Mtn. The snow is light and powdery.... The Dweebs expect snow showers to continue throughout most of the day today for a few more inches. The cold core upper low was located over NW Nevada this morning and will slide
- [Very Cold Upper Low to descend upon California over the Thanksgiving Holiday.....Snow and Cold are the highlights of the holiday and possibly down to some very low elevations....](https://mammothweather.com/2015/11/19/very-cold-upper-low-to-descend-upon-california-over-the-thanksgiving-holiday-snow-and-cold-are-the-highlights-of-the-holiday-and-possibly-down-to-some-very-low-elevations/) - Saturday 1:15Pm Once again the ECMWF has a little more westward track for early this week. So again, the westward extent of the track determines the amount of snow we get. With the amount of ensembles that show a little more west- ward track, there is still time for the models to dig more west
- [Warming Trend through Thursday then a bit cooler over the weekend.....Odds increasing for an extended  stormy pattern beginning around the Thanksgiving Holiday with possible significant Storm Cycle.......Current Wx Charts showing long awaited coast to coast Subtropical-Jet  ported to west coast....](https://mammothweather.com/2015/11/17/warming-trend-through-thursday-then-a-bit-cooler-over-the-weekend-odds-increasing-for-an-extended-stormy-pattern-beginning-around-the-thanksgiving-holiday-with-possible-significant-storm-cycle/) - Thursday Night..... This is going to be one very interesting Thanksgiving holiday for travelers over many parts of California and Nevada....... Thursday PM... Forecast Models continue the trend of taking the cold core low inland with much less over water trajectory. Great pattern for cold.....Not all that good for snowfall. However we will still get
- [Storm System slowing this evening as it begins to stretch and split a bit......Snowfall to be delayed until late morning or mid-day at the latest.....](https://mammothweather.com/2015/11/14/storm-system-slowing-this-evening-as-it-begins-to-stretch-and-split-a-bit-snowfall-to-be-delayed-until-late-morning-or-mid-day-at-the-latest/) - Monday PM: There was some media Hype today in the news about the Godzilla El Nino. Although it is true that in the part of the NINO BASIN.... Nino 3 and Nino 3.4, the SSTA has reach +3.0C. However, it has only been there for a week. Now looking at the recharge from the past Kelvin Wave at
- [Upper Ridge Off Shore and a northwest flow aloft will keep clear skies with cool temps in the forecast the next few days.....Next weather system to bring mainly light amounts of Snowfall for the Towns of Mammoth and June with up to 8 inches possible over the upper Elevations Sunday/Ngt](https://mammothweather.com/2015/11/12/ridge-off-shore-and-a-northwest-flow-aloft-will-keep-clear-skies-with-cool-temps-in-the-forecast-the-next-few-days-next-weather-system-to-bring-mainly-light-amounts-of-snowfall-for-the-towns-of-ma/) - Friday AM: As mentioned in my discussion below, third paragraph at bottom, I said that the Dweebs were sure that the QPF would be bumped up and low and behold the models did just that. The guidance suggests that up to 12 inches is now possible over the crest. However, what is not being discussed is that
- [What a Storm!  20 inches at the Main Lodge....26 inches at McCoy Station and 36 inches on Top.....That's' about 2 Feet of Platinum Powder at the Summit on Top of what the WX Front droped!](https://mammothweather.com/2015/11/10/what-a-storm-20-inches-at-the-main-lodge-26-inches-at-mccoy-station-and-36-inches-on-top-thats-about-2-feet-of-platinum-powder-at-the-summit-on-top-of-what-the-wx-front-droped/) - Wednesday PM: Quick Look at 12Z ECMWF and 18Z GFSX show Sundays weather system trending; More *Consolidated over Central CA Stronger further South Wetter for the Central Sierra *Consolidated meaning with "less" splitting. "If" the trend continues well have another storm to write home about..... Remember, this mornings run showed much more splitting over Central
- [1st Platinum Powder Alert For Monday Night!........12 inches of 15:1 expected at and above 10,000 feet by Tuesday Morning........](https://mammothweather.com/2015/11/08/1st-platinum-powder-alert-for-monday-night-12-inches-of-151-expected-at-and-above-10000-feet-by-tuesday-morning/) - Never Trust a Storm! However if a storm is going to weaken and then strengthen with the possibilities of more snowfall, we (The Dweebs) like it! Latest model trends show a deeper, colder and slightly further west tracking system with the same idea as yesterday in bringing in a classic system capable of moderate snowfall amounts. There will
- [Weak Ridging will bring a Minor Warm-up over the high country the next few days.....Sunday Night Monday System Trending Drier than earlier predictions....](https://mammothweather.com/2015/11/06/weak-ridging-will-bring-a-minor-warm-up-over-the-high-country-the-next-few-days-sunday-night-monday-system-trending-drier-than-earlier-predictions/) - Sunday 1:30AM Looking at 00z runs Upper Trof and weather front are now as comparable as it looked 3 to 4 days ago. In fact the moisture plum looks a little juicier. So 7 to 12 inches with some areas as much as 15 inches over the crest at 12:1 to 13:1 at 10K and above. This
- [Its been called the best start to the ski season in 5 years! 12 to 30 inches at 3:00PM Tuesday...more light snowfall tonight!](https://mammothweather.com/2015/11/02/its-been-called-the-best-start-to-the-ski-season-in-5-years-12-to-18-inches-at-530pm-monday-more-light-snowfall-tonight/) - Friday AM: Main focus is now the late Sunday though Monday night system. As indicated earlier, this system looks to be a light to at most moderate precip producer. QPF Amounts forecasted are between .30 and .50 on the west side. There will be an orographic component and so the combination of the temperature of
- [Low pressure system approaching west coast will weaken and sheer as it moves through Wednesday and Thursday....light amounts of snowfall will occur over higher elevations Wednesday/Ngt ........Much colder system may dig south over the Sierra this coming Monday....](https://mammothweather.com/2015/10/26/low-pressure-system-approaching-west-coast-will-weaken-and-sheer-as-it-moves-through-wednesday-and-thursday-light-amounts-of-snowfall-will-occur-over-higher-elevations-wednesdayngt-much-co/) - Brief update Monday AM: Full Update Later today.... California Rivers center shows about 2.00 of QPF slated for our own Sierrra crest by Monday night. the break down is an inch of qpf between 4:00am Monday and 10:00am so that will be the heaviest period. .55 from 10:00am to 4.00pm It will be all snow
- [Storm Clouds Clear Out to leave cool crisp morning in Mammoth with Icy Conditions and Clear Skies.....Westerlies continue to slowly strengthen as well as El Nino.....The week ahead looks seasonal and dry....However....Toward the end of next week,  Stormy....](https://mammothweather.com/2015/10/19/storm-clouds-clear-out-to-leave-cool-crisp-morning-in-mammoth-with-icy-conditions-and-clear-skies-westerlies-continue-to-slowly-strengthen-as-well-as-el-nino-the-week-ahead-looks-seasonal-and/) - Sunday Evening... Chatted with one of the Leed's this morning and the upshot was that too much is going on at this time to make an accrete QPF forecast for the Wednesday night-Friday system. There are two tropical storms out over the pacific. One that is phasing with the westerlies over the western pacific,
- [Record to near record heat will give way to clouds and cooling Wednesday Through the Weekend as Boomerang upper low pays a revisit...](https://mammothweather.com/2015/10/12/record-to-near-record-heat-will-give-way-to-clouds-and-cooling-wednesday-through-the-weekend-as-boomerang-upper-low-pays-a-revisit/) - Wednesday PM: 10-14-15 As we wait for the subtropical upper low to move on shore and spread precip north into the Sierra over the next few days....I have taken another look at the CFS vs 2. It looks pretty dry for the rest of the month of OCT. However, some of the long-range ensembles (Week 2) try to bring
- [Strong Moist Belt of westerlies will remain well north of California into the pacific NW and BC....Much Above Normal Temperatures makes a return to Mammoth Thursday into Sunday......](https://mammothweather.com/2015/10/07/strong-moist-belt-of-westerlies-will-remain-well-north-of-california-into-the-pacific-nw-and-bc-much-above-normal-temperatures-makes-a-return-to-mammoth-thursday-into-sunday/) - Partly cloudy skies continued most of the day Tuesday as the remains of the closed low that moved through CA Monday and Tuesday...slowly moved east over Arizona last night. That system is progged to move into Western New Mexico, then drop south to NW Mexico by Thursday and over the Sea of Cortez by Saturday. By Sunday and
- [Upper Low Now Moving South through the Pacific NW will increase breezes this afternoon with a upper winds becoming easterly by Sunday....Some light snowfall expected......Warming trend later next week with the eventual return of low 70s by next weekend end....](https://mammothweather.com/2015/10/03/upper-low-now-moving-south-through-the-pacific-nw-will-increase-breezes-this-afternoon-with-a-upper-winds-becoming-easterly-by-sunday-some-light-snowfall-expected-warming-trend-later-next-week/) - The Forecast models are in good agreement in bringing a closed upper low south from the Northern CA coast then SE along the coast line or just inland over Ventura County. It then is expected to shift east Monday.... The majority if the precipitation will be over the Southern Sierra Near Mount Whitney. Over a foot of snow
- [Mid Latitude Trof Spreads Subtropical Moisture into California with showers expected by late morning and into the afternoon....Snow Level is above 10,500 feet......Clearing Friday then fair Saturday AM with the next system colder with the potential of several inches of snowfall above 8K Saturday Night into Monday Night...](https://mammothweather.com/2015/10/01/mid-latitude-trof-spreads-subtropical-moisture-into-california-with-showers-expected-by-late-morning-and-into-the-afternoon-snow-level-above-10500-feet-clearing-friday-then-fair-saturday-with/) - Thursday Afternoon Update: Just saw the finished run of the 12Z Thursday ECMWF. It is remarkably in step with its previous runs and preferred over the 12Z GFS for that reason. The Dweebs are not sure why the GFS is taking the upper low down the coast to LA Sunday night and Monday. However, the
- [Wrapping up the Month of September and being retrospective..it has been a real warm one......Our first either inside or outside slider will make its way through Northern and Central CA Sunday.....Showers and possible snowfall is expected....](https://mammothweather.com/2015/09/29/wrapping-up-the-month-of-september-and-being-retrospective-it-has-been-a-real-warm-one-our-first-either-insice-or-outside-slider-will-make-its-way-through-northern-and-central-ca-sunday-show/) - Wednesday AM: The 06z GFS has a better organized but small system ejecting through Central and Northern CA. There is plenty of moisture for it to interact with. The models generate between .25 and .35 over Southern Mono County Thursday with a freezing level of 11,000 feet. In that it is convective, a snow level down
- [Upper High remains anchored over the Desert Southwest and will hold off the Eastern Pacific Trof at least through Tuesday....Above normal Temps following suite....El Nino Strengthening again....](https://mammothweather.com/2015/09/25/upper-high-remains-anchored-over-the-desert-southwest-and-will-hold-off-the-eastern-pacific-trof-at-least-through-tuesday-above-normal-temps-following-suite-el-nino-strengthening-again/) - High temperature records will fall today over the Owens Valley with a high forecasted of 96 for Bishop breaking the previous record of 95 set back in 2010. An upper high is located over the Colorado River today along the CA/AZ border with very warm temps resulting. This upper high is likely to meander over the Desert SW
- [Above Normal Temps likely now through Friday as Forecast  models delay the arrival of Gulf of AK Trof.....Expect high temps in Mammoth to remain the 70s through Friday.....](https://mammothweather.com/2015/09/21/above-normal-temps-likely-now-through-friday-as-forecast-models-delay-the-arrive-of-gulf-of-ak-trof-expect-high-temps-in-mammoth-to-remain-the-70s-through-friday/) - Wednesday: Latest guidance suggests that little will change weather-wise through at least Friday. There may be a little cooling by the end of this weekend. Further cooling is expected Monday and Tuesday. It will be dry through Sunday with stronger zephyr breezes Sunday. Other thoughts..... Winter of 97/98: There was only one significant storm around October 10th. A Winter
- [Upper Trof firing one last short wave into Northern CA Wednesday....Long Wave Trof to shift east Thursday with upper ridging from the West building in over the weekend.....](https://mammothweather.com/2015/09/16/upper-trof-firing-one-last-short-wave-into-northern-ca-wednesday-long-wave-trof-to-shift-east-thursday-with-upper-ridging-from-the-west-building-in-over-the-weekend/) - Monday AM: Upper subtropical Low continues its recent track into Northern Baja limiting meaning moisture advection into Southern Mono County. Today Monday should be a carbon copy weather wise of Sunday, with high 70s once again this afternoon. Nighttime lows have been in the mid 40s here near the village of Mammoth. The forecast maps show
- [Remains of TS Linda now moving into Mono County with some Moderate precipitation possible by early afternoon.....Cooler Upper Trof to bring showers....Breezy weather Tuesday into Wednesday AM.....Light Freeze expected Thursday Morning...](https://mammothweather.com/2015/09/14/remains-of-ts-linda-now-moving-into-mono-county-with-some-moderate-precipitation-possible-early-afternoon-cooler-upper-trof-to-bring-showers-breezy-weather-tuesday-night-and-wednesday-am/) - Tuesday Evening: Moisture bands are holding together well as they move across the sierra. Good upslope along with the approaching cold front should allow more showers to drift over the crest and into Mammoth over night. Top of Mammoth Mt is still above freezing at 36 degrees at the moment. Some cooling will give the
- [Smoke and haze to continue the next few days as Rough Fire Rages.....Light easterly flow may not be enough to shift smoke to the west......Warmer than normal temps developing this week...](https://mammothweather.com/2015/09/07/smoke-and-haze-to-continue-the-next-few-days-a-rough-fire-rages-light-easterly-flow-may-not-be-enough-to-shift-smoke-to-the-east-warmer-than-normal-temps-developing-this-week/) - Wednesday: As a trough of low pressure deepens north of Kauai, high pressure aloft will continue to build over California while some moisture spinning off Hurricane Linda has moved into the deserts of Southern CA. Light southerly mid level flow will spread smoke from the Rough Fire northward during the afternoons while during the nighttime, the
- [Although Smoke and Haze has returned to the high country...Moderate WSW winds Friday will flush it out through Saturday......Haze will likely come back next week...](https://mammothweather.com/2015/09/03/although-smole-and-haze-has-returned-to-the-high-country-moderate-wsw-winds-friday-will-flush-it-out-through-saturday-haze-will-likely-come-back-next-week/) - Saturday 1:00PM We received a nice break from smoke from the Rough Fire yesterday as a moderate SW flow developed. Today's upper flow suggests a light NW flow aloft, keeping much of the smoke suppressed to our south. By late tonight the NW flow will weaken and Smoke from the Rough Fire will probably move north again
- [The Haze will give way to clearing skies by Wednesday Afternoon as SW flow increases over the region...Expect Breezy Weather with a cool down Wednesday through Saturday....Dry Weather is expected through the Holiday Weekend....](https://mammothweather.com/2015/09/01/the-haze-will-give-way-to-clearing-skies-by-wednesday-afternoon-as-sw-flow-increases-over-the-region-expect-breezy-weather-and-a-cool-down-wednesday-through-saturday-dry-weather-is-expected-the-h/) - Today is the first day of Meteorological Fall with the official 1st day of Astronomical Fall beginning later this September on the 23rd. The weather will become cooler towards the weekend with Gusty SW winds developing Wednesday afternoon and then on and off through Friday. Highs over the weekend will be in the mid 60s
- [Smokey skies to give way early Saturday afternoon to clearing as a Strong Trof for late August ushers in strong gusty SW winds and cooler temps....](https://mammothweather.com/2015/08/28/smokey-skies-to-give-way-tonight-to-clearing-as-a-strong-trof-for-late-august-ushers-in-strong-gusty-sw-winds-and-cooler-temps/) - Today Friday we had southerly flow which brought smoke north from the Rough Fire into Mammoth Lakes. A strong for August upper trof and cold front will drive though the Eastern Sierra Saturday. Once the stronger winds develop Saturday, smoke for the Rough Fire should become shunted more to our south crossing the Owens Valley
- [Cooling promised for next week looks delayed until weeks end as 4-Corners high too strong.....Seasonal temps expected with breezier weather much later next week....](https://mammothweather.com/2015/08/22/cooling-promised-for-next-week-looks-delayed-until-weeks-end-as-4-corners-high-too-strong-seasonal-temps-expected-with-breezier-weather-much-later-this-week/) - Tuesday PM: Tropical Update: So far...all the tropical storms are forming well west of Mexico and are traveling from East to West within the Easterlies. This pattern is expected to continue for the next week or two. So at this particular time, any hurricanes developing in the deep tropics will not likely be a player in CA weather.
- [High temps will settle back to normal as we trend into next week......Strong amplification from recurving Typhoon east of Japan will develop a major trof off the west coast the end of the month.....Record El Nino event still possible......](https://mammothweather.com/2015/08/20/high-temps-will-settle-back-to-normal-as-we-trend-into-next-week-strong-amplification-from-recurving-typhoon-east-of-japan-will-develop-a-major-trof-off-the-west-coast-the-end-of-the-month/) - Brief message from the Bureau of Meteorology of AU on El Nino..... The 2015 El Niño has continued to strengthen over the past 14 days... "The ocean and atmosphere are reinforcing each other", with tropical Pacific Ocean temperatures well above El Niño thresholds, consistently weakened trade winds, and a strongly negative Southern Oscillation Index. Strong coupling of the
- [Another rainless week ahead with above normal temperatures through Thursday...Then Breezy and not a warm into the following weekend......Some interesting changes coming up the end of the month....](https://mammothweather.com/2015/08/15/another-rainless-week-ahead-with-above-normal-temperatures-through-thursday-then-breezy-and-cooler-weather-into-the-following-weekend-some-interesting-changes-coming-up-the-end-of-the-month/) - Its official! The Nino 3.4 region is now +2.C !! We Officially have a Very Strong El Nino for the past week Walker Fire Update #5 8-19-2015 8 AM Incident: Walker Fire Wildfire Lee Vining, CA: Burning approximately two miles southwest of Lee Vining the Walker Fire remains at 3,715 acres. This is a human-caused
- [Upper West Coast Trof will keep skies clear Monday through Wednesday for excellent Meteor Shower Viewing....Expect breezy weather at times with a very dry air mass.........Next warm up develops as Upper Trof lifts NE through Northern CA Thursday and Continental high expands west next weekend....](https://mammothweather.com/2015/08/09/upper-west-coast-trof-will-keep-skies-clear-monday-through-wednesday-for-excellent-meteor-shower-viewing-expect-breezy-weather-at-times-with-a-very-dry-air-mass-next-warm-up-develops-as-upp/) - The Dweebs expect a dry week ahead....at least through next Friday as a negative height anomaly anchored off the west coast keeps a dry SW flow going...... Daytime high Temperatures (low to mid 70s) will average a few degrees below normal and nighttime lows in some areas will dip into the 30s over night. Seasonal to above
- [High Clouds Flowing Northeastward from TS east of Hawaii has shifted south this morning....That band will lift north back into Mono County later today.......Showers likely late Thursday Night into Friday followed by Fair weekend.......Perseid Meteors are on the way....El Nino Comments!!!!](https://mammothweather.com/2015/08/05/high-clouds-flowing-northeastward-from-ts-east-of-hawaii-has-shifted-south-this-morning-that-band-will-lift-north-back-into-mono-county-later-today-showers-likely-late-thursday-night-into-fri/) - It been a very unusually wet Summer here in the eastern central sierra. Isopleths suggest that precipitation is running about 250% of normal for Mammoth June through July. The current pattern continues to favor more mid latitude trofing over the far eastern pacific causing temps to remain a bit cooler then normal for this time of
- [With a Persistent Upper Trof along the West Coast....Expect a dry week ahead with a Stronger Zephyr at times.....Rain out of the forecast for Mammoth through Thursday......](https://mammothweather.com/2015/08/03/with-a-persistent-upper-trof-along-the-west-coast-expect-a-dry-week-ahead-with-a-stronger-zephyr-at-times-rain-out-of-the-forecast-for-mammoth-through-thursday/) - An upper trof will remain anchored along the west coast this week with a dry SW flow aloft. For the most part this will be a rainless week with only a slight chance Friday and night....High Temps will average near normal for August with highs in the mid to upper 70s then cool to the
- [Two Short/Easterly Waves on the move from the south to influence weather over Mono County this weekend...](https://mammothweather.com/2015/07/30/two-shorteasterly-waves-on-the-move-from-the-south-to-influence-weather-over-mono-county-this-weekend/) - Moisture, mainly high level is increasing from the southeast where PWAT values are close to 2.00 in some areas. Over Southern Mono County at the moment PWAT is running about .7 so it has a long way to go before we get into the Soup.... Two short waves rotating around the Continental high will provide
- [Upper Trof will exit the Eastern Sierra Today followed a little cooling......Continental Upper High will expand west by Mid Week bringing a warm up 1st.....Followed by a Chance of Thunderstorms Beginning Thursday into the Weekend........](https://mammothweather.com/2015/07/27/upper-trof-will-exit-the-eastern-sierra-today-followed-a-little-cooling-continental-upper-high-will-expand-west-by-mid-week-bringing-a-warm-up-1st-followed-by-a-chance-of-thunderstorms-beginn/) - A synoptic scale upper Trof will exit Western Nv today and lift NE into the Northern Rockies Tuesday. This has brought a very dry air mass to the Eastern Sierra. NW flow aloft will back to the west today then weaken Tuesday followed by rising heights and a warm up beginning Tuesday. At the moment, the Continental High is
- [A dry upper Trof over the west coast this morning will continue last nights drying trend....with another transitory dry Trof for the weekend continuing the trend....Weather to turn hot prior to the Bluesapalooza Fest................](https://mammothweather.com/2015/07/23/a-dry-upper-trof-over-the-west-coast-this-morning-will-continue-last-night-drying-trend-with-another-transitory-dry-trof-for-the-weekend-continuing-the-trend-weather-to-turn-hot-for-the-bluesa/) - The latest Meso-Scale analysis showed no 850/250mb couplets over Mono County. Precipitable water was down to .6 over Mammoth and outside of the Rt Rear entry region over Northern Inyo...Stability indices have increased to +1 with +2 just to the west of the crest. All this adds up to a day of very weak forcing for
- [Remnant's of Dolores' is over the Sierra Today.....Very light upper flow combined with high instability indices will increase the possibility for heavy down pours in many areas today for Mono County....Main action will shift off to areas east of Highway 395 by Wednesday afternoon as an Upper Trof with Drier Air approaches.....This up coming weekend will be Fair...Dry and Warm.........](https://mammothweather.com/2015/07/21/remnants-of-dolores-is-over-the-sierra-today-very-light-upper-flow-combined-with-high-instability-indices-will-increase-the-possibility-for-heavy-down-pours-in-many-areas-today-for-mono-county/) - Today Tuesday appears to be potentially the most active day for thunderstorm's with heavy downpours. This mornings sounding showed a weaker inversion above 16,000 feet than what was the case yesterday. This means that there is a weaker warm air pocket in that area causing the Cap to the lift yesterday. Additionally.....increased moisture from the remains of Dolores' and a CAPE of close to
- [Monsoon Moisture Along with some dynamics to bring an increase in Thunderstorms Sunday into Monday.....Otherwise Fair and dry through Saturday with Seasonal temps....](https://mammothweather.com/2015/07/16/monsoon-moisture-along-with-some-dynamics-to-bring-an-increase-in-thunderstorms-sunday-into-monday-otherwise-fair-and-dry-through-saturday-with-seasonal-temps/) - Sunday AM: Will make this as quick and clear as possible this AM: At the moment, up at 300MB there is a weak WSW/ENE upper trof or boundary that gets pinched off into an upper low off the central coast this afternoon. This boundary has acted as a barrier in the northward movement of moisture. You
- [Beautiful Eastern Sierra Weather on Tap for the next few days.....Moisture from Dolores in doubt again as she spins up...slows down and most likely will miss the window of opportunity of getting picked up by a weak west coast trough....](https://mammothweather.com/2015/07/15/beautiful-eastern-sierra-weather-on-tap-for-the-next-few-days-moisture-from-dolores-in-doubt-again-as-she-spins-up-slows-down-and-most-likely-will-miss-the-window-of-opportunity-of-getting-picke/) - Beautiful weather will continue here in the high country with highs in the mid 70 and lows in the upper 40s......Moisture from Dolores in doubt again as she spins up, slows down and may miss the opportunity of being picked up by an approaching trough. Will take one last look at it tomorrow AM...
- [Slow warming trend in the forecast through Thursday.......Models are moving toward more summer troughing over the East Pac in the weeks to come...possibly opening the door to a tropical system next week....A surge of monsoon moisture coupled with moisture from Dolores is heading north into CA this weekend......](https://mammothweather.com/2015/07/13/slow-warming-trend-in-the-forecast-through-thursday-models-are-moving-toward-more-summer-troughing-over-the-east-pac-in-the-weeks-to-come-possibly-opening-the-door-to-a-tropical-system-next-we/) - Tuesday PM. Idea of any meaningful effect from Dolores are still in question this afternoon as the latest model runs keep her off shore. Stay tuned! Monday Evening: The Dweebs are reconsidering the idea of the Dolores effect upon Southern and Central CA. However, not from a wind or tropical storm idea...rather from a precipitation event. Both
- [Thunderstorms Rumble with Marble Sized Hail Today.....Rare for July closed low making landfall over Central CA Wednesday.....More rain to Come especially Thursday then drying tend into the weekend.....MJO now at dateline moving east and weakening.....But not before Cranking up the East Pac Hurricane Season!](https://mammothweather.com/2015/07/07/thunderstorms-rumble-with-marble-sized-hail-today-rare-for-july-closed-low-making-landfall-over-central-ca-wednesday-more-rain-to-come-especially-thursday-then-drying-tend-into-the-weekend/) - Sunday AM: Some lingering convection over Mono County brought a few showers and a Beautiful Rainbow in town. ENSO now most likely driving the +PDO as the new update shows it strengthening again... Weather outlook shows a slow warming trend with still the slight chance of a few isolated thunderstorms Sunday. High temps in the
- [Chance of Thunderstorms through the Holiday Weekend....MJO off the Charts over the Western Pac](https://mammothweather.com/2015/07/02/chance-of-thunderstorms-through-the-holiday-weekend-mjo-off-the-charts-over-the-western-pac/) - Flash Flood Watch Today: http://forecast.weather.gov/showsigwx.php?warnzone=CAZ073&warncounty=CAC051&firewxzone=CAZ273&local_place1=17 Miles ESE Bodie CA&product1=Flash+Flood+Watch&lat=38.0781&lon=-118.739#.VZgAMGfbKUk Saturday the 4TH of July: An upper wave moving NW along the periphery of the upper high is tracking NW along the CA/NV border. Abundant moisture and instability will combine to bring a good chance of rainfall to Mono County, Later this AM and this afternoon. Not
- [Thunderstorm Action will continue this afternoon....with less action wednesday then increasing thunderstorm's Thursday and Friday.....MJO rapidly intensifying over West Pac](https://mammothweather.com/2015/06/30/thunderstorm-action-will-continue-this-afternoon-with-less-action-wednesday-then-increasing-thunderstorms-thursday-and-friday-mjo-rapidly-intensifying-over-western-pacific/) - Wednesday PM: As indicated earlier, thunderstorm action will be suppressed this afternoon. Much of the action will be over the southern sierra due to the configuration of the upper high. Very late this afternoon or early evening odds will increase somewhat. Better odds Thursday and Friday... Check out the BMOM forecast; the Sigma is
- [A Fire Weather Watch is Hoisted for the Sierra of Mono County because of the possibility of Dry Lightening Saturday afternoon through Sunday evening.....Wetter Storms are possible Later Sunday afternoon.....MJO is Amping as it goes into the Western Pacific....There will be a pattern change due to this action the week following July Fourth...But it may not effect the far southwest.](https://mammothweather.com/2015/06/27/a-fire-weather-watch-is-hoisted-for-the-sierra-of-mono-county-because-of-the-possibly-of-dry-lightening-saturday-afternoon-through-sunday-evening-wetter-storms-are-possibly-later-sunday-afternoon/) - Sunday AM: A few sprinkles occurred yesterday afternoon in Mammoth Lakes. The most important thing that happened was that air mass modification occurred, as evidenced by 1. Dew points have risen from the mid 30s yesterday to the mid 40s this AM and Precipitable water has jumped up in our area up to about 3/4
- [The Heat is On.....With deserts in the low 100s then Mid 100s this weekend...High Country Resort Levels in the 80s with Breezy Afternoons......Old MJO suppressed state over the Eastern Pacific so no Tropical Storms for a while.....Enhanced State weakening over the Western Caribbean.....Major MJO Entering Western pacific Soon.....](https://mammothweather.com/2015/06/16/the-heat-is-on-with-deserts-in-the-low-100s-then-mid-100s-this-weekend-high-country-resort-levels-in-the-80s-with-breezy-afternoons-old-mjo-suppressed-state-over-the-eastern-pacific-so-no-t/) - It will be a warm, dry and breezy at times this week in Mammoth with an absence of thunderstorms. High temps will be in the high 70s Tuesday then low 80 through Thursday. The Weekend will be extra warm with highs in the low to mid 80s. Overnight lows will be in the 40s. We
- [Very warm weather to continue for the Eastern Sierra with near record highs by Friday.....Upper Dynamics along with the influx of Monsoon Moisture will Juice up our local Air Mass leading to an increasing chance of thunderstorms this weekend....The Outlook for next week is much of the same.....](https://mammothweather.com/2015/06/24/very-warm-weather-to-continue-for-the-eastern-sierra-with-near-record-highs-by-friday-upper-dynamics-along-with-the-influx-of-monsoon-moisture-will-juice-up-our-local-air-mass-leading-to-an-increa/) - The CPC this AM gave a nice discussion in regards to the MJO, the Current Kelvin Wave and ENSO: Here are the important points of interest: 1. A strong kelvin wave is currently out ahead of the position of the MJO’s convective envelope and interacting with the EL Nino Base state. Enhanced tropical convection is occurring
- [After a Cool Breezy Sunday, temperatures will warm again Monday and remain in the Low 80s through Thursday.....Increasing chance of thunderstorms next weekend and into the following week...](https://mammothweather.com/2015/06/22/after-a-cool-breezy-sunday-temperatures-will-warm-again-monday-and-remain-in-the-low-80s-through-thursday-increasing-chance-of-thunderstorms-next-weekend-and-into-the-following-week/) - The CPC this AM gave a nice discussion in regards to the MJO, the Current Kelvin Wave and ENSO: Here are the important points of interest: 1. A strong kelvin wave is currently out ahead of the position of the MJO's convective envelope and interacting with the EL Nino Base state. Enhanced tropical convection is occurring
- [Above normal temperatures to continue the next 10 days for the Eastern Sierra....Continental High Reigns over the Far West.......Not much relief until the Monsoon kicks in late this month.....](https://mammothweather.com/2015/06/20/above-normal-temperatures-to-continue-the-next-10-days-for-the-eastern-sierra-continental-high-reigns-over-the-far-west-not-much-relief-until-the-monsoon-kicks-in-late-this-month/) - Monday AM: Looks like forecast is probably back on track....the high at Bishop Sunday was 99....Forecast was 102 High pressure builds back in by mid week with more heat on the way.... Moisture arrives by the weekend for a chance of Thunderstorm's.... Sky Fire is 60% today contained with full containment by Tuesday.... Yea!! Thanks
- [A drier and more stable air-mass will develop over the Eastern Sierra with much above normal temperatures developing over the next few days....The first 80s of the year are expected this weekend....](https://mammothweather.com/2015/06/12/dryer-and-more-stable-air-mass-will-develop-over-the-eastern-sierra-with-much-above-normal-temperatures-developing-over-the-next-few-days-the-first-80s-of-the-year-are-expected-this-weekend/) - -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Upper Ridge pattern is developing closer to the west coast with much warmer temperatures in the days ahead. It looks like there may be a few isolated thunderstorms in the late afternoon but odds are pretty low for anything significant. The main idea is to nudge the off shore ridge in this weekend
- [Moisture from Tropical depression Blanca is moving north over the Baja Peninsula and will merge with upper low west of Southern CA Tuesday Night and Wednesday.......Moderate to possibly Heavy Rainfall is expected....](https://mammothweather.com/2015/06/08/moisture-from-tropical-depression-blanca-is-moving-north-over-the-baja-peninsula-and-will-merge-with-upper-low-west-of-southern-ca-tuesday-night-and-wednesday-moderate-to-possibly-heavy-rainfall/) - Tropical Storm Blanca made landfall on the west side of Mexico's Baja Peninsula this morning about 5 AM. Top winds were 45MPH. This is possibly the earliest landfall of a tropical storm along the BAJA Coast ever. The last time an early landfall occurred was early July of 1993. Tuesdays weather looks fair in the morning
- [Forecast Models This Evening are becoming more Robust with the upcoming pattern of a closed low developing a bit more south for better Divergence over Mono County.......Upper Low Ejects out by Sunday.......But leaves part of the Trof behind for more upper divergence next week.....](https://mammothweather.com/2015/06/03/forecast-models-this-evening-are-becoming-more-robust-with-the-upcoming-pattern-of-a-closed-low-developing-a-bit-more-south-for-better-divergence-over-mono-county-upper-low-ejects-out-by-sunday/) - Saturday PM: Another 850 Convergence-250 Divergence couplet has developed over the Owens Valley. No doubt this will assist to firing up some afternoon convection for more of the same today and this evening. Over Mono County, plenty of moisture being re-circulated and plenty of morning sun to increase the CAPEs this PM for more of the same
- [Weak Trofing continues today with Afternoon Breezes Expected....Showers and some Thunder Expected Friday and Saturday......](https://mammothweather.com/2015/06/02/weak-trofing-continues-today-with-afternoon-breezes-expected-showers-and-some-thunder-expected-friday-and-saturday/) - Forecast models have come into more agreement for the weekend showing where and how an upper low will move through California. It forms a closed center near the Bay Area Thursday at 11:00AM then follows the coast line to LAX by Friday Night at 11:00PM. There after the track takes it over Death Valley by Saturday at
- [Winds Picking up as expected.....Breezy tonight....However stronger winds expected Monday as secondary stronger jet moves west to east to the north of Mammoth.....It will be cooler as well......Interesting change to pattern later next week with upper closed low and spun up jet from Andres......](https://mammothweather.com/2015/05/31/winds-picking-up-as-expected-however-stronger-winds-expected-monday-as-secondary-stronger-jet-moves-west-to-east-to-the-north-of-mammoth-it-will-be-cooler-as-well-interesting-change-to-patte/) - Sunday PM: The GFS this morning has come over to the thinking of the ECMWF.....to no surprise, for weather system next Thursday and Friday! Nice phone discussion with Retired Lead Forecaster. Tom C. on the matter. Tom stressing upper jet dynamics rather than to look solely upon moisture advection from Andres. The Dweebs took a
- [Roasty Toasty Weekend Saturday with Strong Zephyr Sunday PM....Dry for the Sierra until Further Notice......MJO Phase Space is showing a lot of Amplitude over the next few weeks......Could be sign of a Cool Down by Mid June.....](https://mammothweather.com/2015/05/29/roasty-toasty-weekend-saturday-with-strong-zephyr-sunday-pm-dry-for-the-sierra-until-further-notice-mjo-phase-space-is-showing-a-lot-of-amplitude-over-thee-next-few-weeks-could-be-sign-of/) - Warming trend in process with highs the next few day in the 70s in Mammoth. A short wave of low pressure aloft will kick the Mono Zephyr in high gear Sunday and so it will become very breezy locally. These winds will blow into the night Sunday and possibly Monday as well. Lows temps over
- [MAMMOTH MT CLOSES THE END OF TODAY ON 10 TO 40 INCH BASE.....SEVERAL INCHES OF NEW SNOW FELL AROUND THE HOLIDAY....THE CHANCE OF MORE THUNDER IS EXPECTED WITH A WARMING TREND THIS WEEK......](https://mammothweather.com/2015/05/25/mammoth-mt-closes-today-on-10-to-40-inch-base-several-inches-of-new-snow-fell-around-the-holiday-the-chance-of-more-thunder-is-expected-with-a-warming-trend-ths-week/) - Tuesday AM: Showers and Thunder brought up to a Quarter of an inch of rain over some areas of the Mono County Crest with Mammoth Pass getting .24 hundreds. Some areas over western NV had 1/2 inch of rain. There is similar conditions today although the air mass is a tad drier. There appears to
- [One Last Vort Center Moving our way this Afternoon with More Showers and Thunderstorms Today and Tonight....Slow drying trend with just a chance of showers Sunday....Warming trend Monday through next week.....](https://mammothweather.com/2015/05/23/one-last-vort-center-moving-our-way-this-afternoon-with-more-showers-and-thunderstorms-today-and-tonight-slow-drying-trend-with-just-a-chance-of-showers-sunday-warming-trend-monday-through-ne/) - Nice Vort coming down the interior of CA this afternoon. It should be south of us by 10:00pm. Showers are breaking out all over at the moment. There could be thunder and hail as well as some brief heavy rain later today..... Amounts .25 to .50 are possible in localized areas. The block over the NWT
- [In the short term...a chance of afternoon showers will continue....There is one last good system that will bring more organized showers Thursday and Friday....The Long Wave over the far west is filling...leading to warming temps by weeks end....](https://mammothweather.com/2015/05/19/in-the-short-term-a-chance-of-showers-will-continue-however-the-long-wave-over-the-far-west-is-filling-leading-to-warming-temps-by-weeks-end/) - More sunshine is expected today, with no significant forcing dynamically over Mono County. However, the SPC still indicates some CAPE of 500 joules/per KG over and near the Inyo/Mono Border this Morning....So it will be the sun that will generate any shower over the sierra this afternoon. This would be this afternoon most likely if at all. The
- [Unsettled weather to continue through this weekend and into next week as long wave upper trough remains a fixture over CA....](https://mammothweather.com/2015/05/15/unsettled-weather-to-continue-through-the-weekend-and-into-next-week-as-long-wave-upper-trough-remains-a-fixture-over-ca/) - Monday AM: 920AM Looks like another very active day today.. SPC shows a very strong 250MB Divergence-850mb convergence couplet over the Owens Valley at the moment associated with the 300mb cyclonically curved upper jet to the south. Best Surfaced Based Cape is located along the CA/NV border and SE Inyo County 500-1200 Joules per Kilogram
- [Blocking Pattern over Northwest Canada will suppress Upper Jet well South into CA this week and into the next...Expect cooler than normal temps with periods of Rain and Snow in the High County...](https://mammothweather.com/2015/05/12/blocking-pattern-over-northwest-canada-will-suppress-upper-jet-well-south-into-ca-this-week-and-into-the-next-expect-cooler-than-normal-temps-with-periods-of-rain-and-snow-in-the-high-county/) - Wednesday AM Update: It appears that we have 3 significant short waves (Storms) to expect weather from. 1. The 14th and 15th. Cold Spring system with subtropical tap. A foot+ possible over Mammoth Mtn (4 to 7) inches at 8K..... (2 to 4 inches above 6500) 2. The 17th through the 19th ( Not as cold as
- [Series of Cold Lows to bring chilly temps and Snowfall to the high country.....Thursday....Tuesday the 12th  and possibly Friday  later next week....](https://mammothweather.com/2015/05/06/series-of-cold-lows-to-bring-chilly-temps-and-snowfall-to-the-high-country-thursday-tuesday-the-12th-and-possibly-friday-later-next-week/) - Friday AM Update: The Dweebs have been traveling the past week, but have been keeping tabs on MammothWeather. A good foot has fallen at the Main Lodge and some 6 to 8 inches in town. Many of the loader drivers have long since removed their chains from their machines and so it may have been
- [Warming trend to continue today with well above normal temps....Warm temps will continue over the high country much of this week with isolated thunder beginning Thursday PM....Better chance of showers Sunday into Monday.....Cooler by Mid Week the 6th](https://mammothweather.com/2015/04/28/warming-trend-to-continue-today-with-well-above-normal-temps-warm-temps-will-continue-over-the-high-country-much-of-this-week-with-isolated-thunder-beginning-thursday-pm/) - Tuesday evening.... Closed upper lunker dropping south from the pacific NW into CA Wednesday night. Chilly pattern with some snowfall in the high country possible. .Showery with thunder as well. Chilly way to start the weekend.... Thursday PM: Late spring like thunderstorm pattern. Highs in the upper 60s then cooling to the 50s by
- [Warming Trend underway w/ decreasing wind over the Crest as an Upper Ridge Translates East via CA.....Weak Troughing the second half of this week spells Breezy Afternoons.....Interesting ENSO numbers today.....](https://mammothweather.com/2015/04/27/warming-trend-underway-w-decreasing-wind-over-the-crest-as-an-upper-ridge-translates-east-via-ca-weak-troughing-the-second-half-of-this-week-spells-breezy-afternoons-interesting-enso-numbers/) - The High Country is recovering from a cold wet Saturday and a cool Sunday. However 500MB heights are rebounding quickly today with about 10 degrees of warming expected. Another 6 to 7 degrees of warming is expected Tuesday. by Mid week a weak trof of low pressure will approach the west coast and bring breezy
- [Winter weather advisories hoisted for Saturday morning through the afternoon...Rather blustery Fishing Opener Expected....Expect rapid warming early next week......](https://mammothweather.com/2015/04/24/winter-weather-advisories-hoisted-for-saturday-morning-through-the-afternoon-rather-blustery-fishing-opener-expected-expect-rapid-warming-early-next-week/) - Saturday 5:15 PM Storm Totals: Mammoth Pass: .72 Main Lodge . 52 Village at Mammoth .25 Snowfall Village 6 inches Main Lodge 9 inches Top old Woolly 12 inches Friday AM Update: Winter weather advisories are hoisted for Mono County beginning 5:00AM to 5:00PM Saturday. Northwest slider to bring 4 to 8 inches of snowfall accumulations
- [Showers and Thunder to continue through Saturday with Possible Grand Finale' Saturday Morning.......Much warmer and drier Sunday into Wednesday...](https://mammothweather.com/2015/04/23/showers-and-thunder-to-continue-through-saturday-with-possible-grand-finale-early-saturday-morning-much-warmer-and-drier-sunday-into-wednesday/) - Showers lined up along areas of deformation From Eastern Ca and over Nevada This afternoon. 850mb Deformation axis ran from Highway 50 east to Austin, NV. There was another deformation axis at 750MB over Southern NV with showers associated with it. Over Southern Mono CO, at 1:30PM the LI index was 0 and without much focusing
- [Unstable Showery Pattern to continue the Next Several Days...No Major Precipitation but continued mainly afternoon Showery Weather with the Chance of Thunder through Friday...The Weekend Looks Drier and Warmer.....Especially by Sunday......](https://mammothweather.com/2015/04/20/unstable-showery-pattern-to-continue-the-next-few-days-no-major-precipitation-but-showery-weather-with-the-chance-of-thunder-through-saturday-the-weekend-looks-drier-and-warmer-especially/) - Wednesday AM: Nothing to write home about yesterday except for a lot of high based convection. Most of the rain and thunder was on the west side again. Today the atmosphere is a little different. The PWAT is higher up to a 1/2 inch and the upper low over Southern CA will lift north a
- [Warmer weather on tap the next few days with light breezes......Interesting pattern begins to develop early next week with energetic southern stream storm track for CA later next week.....](https://mammothweather.com/2015/04/16/warmer-weather-on-tap-the-next-few-days-with-light-breezes-interesting-pattern-begins-to-develop-early-next-week-with-energetic-southern-stream-storm-track-for-ca-later-next-week/) - Thursday PM: Don't put them boards away just quite yet! Forecast guidance is in good agreement that a west coast split flow pattern will set up next week. Although the details have yet to be worked out....A long wave Trof will set up over western North America with an Upper Ridge in mean, over Western Canada. The latter is associated
- [After a Chilly Trof Passage this morning the Weather will Remain cool for a few days before rapid warming develops Friday into the weekend....Another System lurking for Next Week!](https://mammothweather.com/2015/04/14/after-a-chilly-trof-passage-this-morning-the-weather-will-remain-cool-for-a-few-days-before-rapid-warming-develops-friday-into-the-weekend-another-system-lurking-for-next-week/) - Cold Windy Weather, typical for April developed overnight with a few snow showers early this morning. Although some locals called it Hail....It was actually Snow Pellets. A type of precipitation common in the Spring. Strong gusty winds both preceded the upper trof and followed it. Winds diminished this afternoon in town. Temperatures today were in
- [Warmer Weekend on Tap with a few showers Sunday PM...Then windy and cooler by Late Monday Pm into Tuesday....Thereafter a warm up into the following weekend....](https://mammothweather.com/2015/04/11/warmer-weekend-on-tap-with-a-few-showers-sunday-pm-then-windy-and-cooler-by-late-monday-pm-into-tuesday-thereafter-a-warm-up-into-the-following-weekend/) - Not much going on weather-wise the next few days. However ,Skiing and Boarding were reportedly very good on the upper slopes yesterday with folks I spoke with late afternoon Friday.... High pressure aloft building in today will set the stage for warmer weather today though Monday PM, then a cold front is expected to move early Tuesday
- [Mammoth Mt Receives 18 to 24 inches from the biggest cold storm of 2015!...and over a foot at the Village at Mammoth.....Beautiful weekend for skiing shaping up......The Next Storm about the following Tuesday!](https://mammothweather.com/2015/04/08/mammoth-mt-receives-18-to-24-inches-from-the-biggest-cold-storm-of-2015-and-over-a-foot-at-the-village-at-mammoth-beautiful-weekend-for-skiing-shaping-up-the-next-storm-about-the-following/) - Thursday 6:15 PM Warming trend in play with lots of high clouds due to the splitting system off shore. No real changes to the forecast other than to add some CU over the Sierra early in the weekend. There is a chance of snow showers Tuesday/Ngt.. No big deal though...The rest of next week looks fair.
- [Colder Weather Ahead With Snowfall in Our Future......Its official.....The Winter of 2014-2015 is Driest on record.....](https://mammothweather.com/2015/04/02/colder-weather-ahead-with-snowfall-in-our-future-its-official-the-winter-of-2014-2015-is-driest-on-record/) - Wednesday AM: Totals 14.5 inches at Mammoth Weather.com at the 8200 foot level and 18 to 24 inches on Mammoth Mt. Including the crest. Tuesday PM 11:00PM As mentioned in my afternoon report below, snowfall continues to pile up due to the nature of this storm and the cold pool aloft. Heavy convective snow showers
- [After another very warm day Monday....A slow change to near season temperatures will occur this week with periods of wind beginning Tuesday......Pattern Change this Week will Continue into the Following Week with MJO Support.....](https://mammothweather.com/2015/03/30/after-another-very-warm-day-monday-a-slow-change-to-normal-temperatures-will-occur-this-week-with-periods-of-wind-beginning-tuesday-pattern-change-this-week-will-continue-into-the-following-week/) - Tuesday AM: No changes for the short-term with winds already up in the high country and cooling moving in. It will be breezy in town (TOML) both today through Wednesday with a high near 59 today and mid to upper 40s Wednesday. Night time lows will be in the teens in many areas by Thursday
- [Change in Pattern Seen in 6 to 10 and 6 to 14 Outlooks to cooler and possibly stormy weather......](https://mammothweather.com/2015/03/28/change-in-pattern-seen-in-6-to-10-and-6-to-14-outlooks-to-cooler-and-possibly-showery-weather/) - Sunday PM: Water Vapor loop over Central CA shows clearly the donut hole of the VT max moving into the Southern Sierra with Cu being forced to its ENE. Cumulus build ups this afternoon occurred as expected. However, still no echo's seen on the radar at this time. However, there is still more daytime heating ahead...thus
- [High pressure aloft will build over the region next few days leading to warmer temps and light breezes.....Another weak impulse moves through Saturday Night and Sunday for a slight chance of showers.......A zonal flow develops mid week to wrap up the end of March and the beginning of April...](https://mammothweather.com/2015/03/25/high-pressure-aloft-will-build-over-the-region-next-few-days-leading-to-warmer-temps-and-light-breezes-another-weak-impulse-moves-through-saturday-night-and-sunday-for-a-slight-chance-of-showers/) - Friday AM: Record high temps were recorded Thursday over the Eastern Sierra for the date. Bishop tied the old high temperature record set back in 1960 with 81 degrees. Today Friday, the high temp record of 79 degrees was set back in 1986. The forecast is for 84 degrees which will shatter the old record. Saturday and
- [Mammoth Mt Reports 2 inches at the Main Lodge.....It is Gusty and Blustery Monday AM......Rising Heights the Next Few Days spells a warm up ahead......](https://mammothweather.com/2015/03/23/mammoth-mt-reports-2-inches-at-the-main-lodge-it-is-gusty-and-blustery-monday-am-rising-heights-the-next-few-days-spells-a-warm-up-ahead/) - Although Mammoth Mt reported new snowfall of only 2 inches this morning at the main lodge.....there was .44 inches tallied in the water bucket.....Temperatures over the crest were in the lows 20s when the moisture band came through. So it is possible based upon .44 inches, there may have been 4 or 5 inches over the
- [Looking Ahead for the Remainder of March.....Next Possible Storm and What April May have in Store for us....](https://mammothweather.com/2015/03/15/looking-ahead-for-the-remainder-of-march-next-possible-storm-and-what-april-may-have-in-store-for-us/) - Friday AM: The first system of the Spring will bring gusty winds and the chance of some light snowfall late Sunday night into Monday. The weekend looks fair and breezy with winds ramping up Sunday and Sunday night over the upper elevations. Wind Advisories are expected Sunday night into Monday AM as a Strong short
- [West Coast Blocking still in process with warmer and drier than normal Forecast for our future.....Longer Range "Outlook" shows the next opportunity of a decent system 10 Days Out.....Rumor Mill Runs Amuck](https://mammothweather.com/2015/03/14/west-coast-blocking-still-in-process-with-warmer-and-drier-than-normal-forecast-for-our-future-longer-range-outlook-shows-the-next-opportunity-of-a-decent-system-10-days-out-rumor-mill-run/) - PS...Congrats to Doug Wolkon from San Diego for figuring out that today is PI Day IE 3.14.15.....9 You get the Dweeb Award! The Good, Bad and the Ugly....... First the Ugly...I visited one of my favorite eatery establishments last night, and as I walked from the parking lot to its front door, I was approached by a
- [A Subtropical Upper jet to bring mainly light precipitation to the high country Wednesday.....Then a rather dirty ridge is expected to develop Friday and into the weekend allowing considerable high clouds and very mild temperatures......A remarkably strong MJO is developing over the Western Pacific the next week and is expected to propagate eastward toward Central Pacific....](https://mammothweather.com/2015/03/10/a-subtropical-upper-jet-to-bring-mainly-light-precipitation-to-the-high-country-wednesday-then-a-rather-dirty-ridge-is-expected-to-develop-friday-and-into-the-weekend-allowing-considerable-high-cl/) - Wednesday AM: Light snow is currently falling in the Town of Mammoth. Snowfall amounts are expected to be in the inch or two range on the mountain with a trace expected in Town, mainly above 8K. As far as the short and medium range forecast's. All of the guidance indicates, drier than normal and warmer than normal conditions
- [Upper High centered over Northern California today will remain in the Vicinity through Monday. Sunny skies, Clear Nights along with light winds are expected to continue....Cooler breezy weather to develop by Tuesday night into Wednesday with the chance of showers......Time to Spring Forward Saturday Night!](https://mammothweather.com/2015/03/06/upper-high-centered-over-northern-california-today-will-remain-in-the-vicinity-through-monday-sunny-skies-clear-nights-along-with-light-winds-are-expected-to-continue-cooler-breezy-weather-to-dev/) - Saturday AM: If you caught this mornings Sat Map, the big closed low NNE of the Big Island has tapped a plume of moisture from the ITCZ.... An Atmospheric River (AR) has been created.... What a waist, as it's too bad it is not directed into CA! SEE: http://www.ospo.noaa.gov/Products/bTPW/index.html Discounting the short and
- [Mammoth Mt Reports 10 to 16 inches Storm Total.....Cold California Trof to Begin Moving East Early Tuesday with an Upper Ridge Building in Mid week.....Thereafter...The Weather to remain fair through this Weekend.....](https://mammothweather.com/2015/03/02/mammoth-mt-report-10-to-16-inches-storm-total-cold-california-trof-to-begin-moving-east-early-tuesday-with-an-upper-ridge-building-in-mid-week-thereafter-the-weather-to-remain-fair-through-n/) - Thursday AM The Global Models are having more difficulty with Pacific Pattern for later next week trying to bring in a decent system. The idea of an "AR" event seems now to be off the table for the time being as models struggle with a pattern shift next week. It does look like we will get some
- [Mammoth MT reporting 6 to 8 inches of cold dry powder this morning.....More on the way!!!](https://mammothweather.com/2015/02/28/mammoth-mt-reporting-6-to-8-inches-of-cold-dry-powder-this-morning-more-on-the-way/) - Sunday AM (24 hour) Update: Although yesterday afternoon's south push of deformation never materialized enough to bring Mammoth Lakes any snowfall.....Lee Side Upslope did occur over night where Mono Lake effect brought several inches to the Lee Vining area. Upslope precip will occur today and into the afternoon where a few more inches is certainly possible. The original forecast of
- [Another Cold Storm is headed our way with good possibilities of at least another 6 to 12 inches over the Upper Elevations.....Friday through Saturday Night....Then Inside slider type system Monday Night and Tuesday adding to snowpack......](https://mammothweather.com/2015/02/26/another-cold-storm-is-headed-our-way-with-good-possibilities-of-at-least-another-6-to-12-inches-over-the-upper-elevations-friday-through-saturday-night-then-inside-slider-type-system-monday-nig/) - One again snowfall amounts are expected in the 6 to 12 inch range with this next chilly Gulf of AK storm. The Maverick in this type of pattern is how and where the upper low spins up at 700MB and thus where the area of deformation sets up and how long it remains over a
- [Mammoth Mt Reports 9 to 12 inches of fresh snowfall....The Dweebs report 8 Inches in the Village......Main area of precipitation is now well south of the Central Sierra....Next snow producing system begins about Friday.....It looks like a windy bugger.....](https://mammothweather.com/2015/02/23/mammoth-mt-reports-9-to-12-inches-of-fresh-snowfall-8-inches-in-the-village-main-area-of-precipitation-is-now-well-south-of-the-central-sierra-next-snow-producing-system-begins-about-friday/) - Wednesday AM: Transitionary Pattern.... The Dweebs have a very strong interest in the pattern for the month of March, as if we are going to get a good storm....it should begin to show up within the next week to 10 days.... While the long range models are still touting retrogression of the eastern pacific ridge and although outlook
- [A Transition in the Weather Pattern from Warm to Cold this Week is Certain....Light snowfall looks likely....Cool Breezy Weather is Expected Next Week....Then March Roars in Like a Lion.....](https://mammothweather.com/2015/02/19/a-transition-in-the-weather-pattern-from-warm-to-cold-this-week-is-certain-light-snowfall-looks-likely-cool-breezy-weather-is-expected-next-week-then-march-roars-in-like-a-lion/) - Monday AM Update: 7:25 AM 8 Inches of fresh dry powder here near the Village at Mammoth and still falling..... Upper cut-off low is still wobbling around and over Central CA today. So there could be a little more snowfall depending upon where the snow bands set up. Another trace to as much as an
- [Fair Warm Weather to Continue through Thursday....Cooler Weather this Weekend....Forecast Continues to be dry in the short term....](https://mammothweather.com/2015/02/17/fair-warm-weather-to-continue-through-thursday-cooler-weather-this-weekend-forecast-continues-to-be-dry/) - Wednesday PM: Good News.. According to the Jamstec (Japanese model) The AMO is crashing and the Atlantic will be cooling the next 6 months... This may very well help the drought over the far west and CA. SEE: http://www.jamstec.go.jp/frcgc/research/d1/iod/e/seasonal/outlook.html ------------------------------------------------------------------------------------------------------------------------------------------------------------- Our hemispheric planetary wave pattern will be going through some significant changes over the next two weeks. Although,
- [West Coast Ridging building in with strong height rises and off shore flow.....Fair mild weather to rule through the weekend......Retrogression to begin Sunday with cooler weather along with gusty winds over the crest later in the weekend.....](https://mammothweather.com/2015/02/11/west-coast-ridging-building-in-with-strong-height-rises-and-off-shore-flow-fair-mild-weather-to-rule-through-the-weekend-retrogression-to-begin-sunday-with-cooler-weather-along-with-gusty-win/) - Saturday PM: The Dweebs been watching the Ensembles Control of both the ECMWF and GFS that last few days. Both now seem to have discontinuous retrogression in play over the next 10 days. I guess that you can say that with the upper ridge adjusting slightly west Sunday and with some cooling next week that it has
- [As Wet Windy Pattern comes to a close.... Drying trend develops with upper ridging taking hold again over the far west...milder temps on the way.....Next pattern change about the 16th.......](https://mammothweather.com/2015/02/09/as-wet-windy-pattern-comes-to-a-close-drying-trend-develops-with-upper-ridging-taking-hold-again-over-the-far-west-milder-temps-on-the-way-next-pattern-change-about-the-16th/) - Notice: Regarding Victim's of the Swall Meadows Fire: As many of The Dweebs know, there was a disastrous fire last Friday that took 40 homes in the Swall Meadows area. Many of these family's need housing at this time. If you know of any or have friends that you would like to contact to see if
- [One More Wet System on the way for Sunday PM.....This Ones a bit Colder on the Finish for More Accumulation in Town by Monday AM.....Then Fair Weather returns by Tuesday......](https://mammothweather.com/2015/02/07/one-wet-system-on-the-way-for-sunday-night-this-ones-a-bit-colder-on-the-finish-for-more-accumulation-in-town-monday-am-then-fair-weather-returns-by-mid-week/) - Monday AM: Storm total in the form of water was between 3.25 and 3.50 inches of water over the upper elevations.... Not nearly as much as touted from all the guidance.. Mammoth Mt did manage to pick up at the 9000 foot level, 4.5 inches of snow early this morning. Although unknown at this
- [It's Almost ShowTime for "AR" event for CA.....Ready....Set....Dump.....Week 2 GFS has an "AR" Encore later in Feb for possible Fab February??](https://mammothweather.com/2015/02/05/its-almost-showtime-for-ar-event-for-ca-ready-set-dump/) - Friday AM: Now it's getting really interesting as HPC's 5 Day QPF has gone though the roof painting 12+ inches of water over the Sierra Crest between Tonight and Monday Night. In chatting with the lead at WSFORNO, the forecaster from last night's shift, was of the opinion that the QPF is way over done. However, with that said,
- [Both WPO and EPO to remain in negative phase this week providing a nice high latitude block to the Westerlies......Energy and cold air now pooling up over the mid latitudes of the Mid Pacific.....Upper Jet to make a Run for the West Coast later this week.....](https://mammothweather.com/2015/02/02/both-wpo-and-epo-to-remain-in-negative-phase-this-week-providing-a-nice-high-latitude-block-to-the-westerlies-energy-and-cold-air-now-pooling-up-over-the-mid-latitudes-of-the-mid-pacific-uppe/) - Wednesday PM: Spoke with the King WX Dweeb T. Cylke this afternoon. He gave me some kind words of advice. Never trust a warm storm of subtropical origin such as this one, in trying to predict snow levels. Why? Because of Micro Physical processes that can allow snow to fall at unusually low levels. This morning's WX discussion from WSFO forecaster Wallman
- [Mostly Cloudy Skies to give way to Sunshine Saturday.....Gusty North to NE winds are expected over the crest with light breezes else ware......Dry weather is expected through Mid Week......A chance of high elevation snow next weekend.....](https://mammothweather.com/2015/01/30/mostly-cloudy-skies-to-give-way-to-sunshine-saturday-gusty-north-to-ne-winds-are-expected-over-the-crest-with-light-breezes-else-ware-dry-weather-is-expected-through-next-week/) - Saturday AM: Some changes are taking place out of the central pacific that over time may affect Northern CA and the Pacific NW. There is a large cyclonic gyre (Long Wave Trof) that has developed north of Hawaiian Islands that is for the time being a part of the REX block associated with the -WPO. For the time
- [Subtropical Moisture Associated with a Rex Block Pattern will stream in later today and tonight with a chance of Snow Showers Thursday through Friday.......Expect a Partly Cloudy Weekend into Next Week](https://mammothweather.com/2015/01/28/subtropical-moisture-associated-with-a-rex-block-pattern-will-stream-in-later-today-and-tonight-with-a-chance-of-snow-showers-thursday-through-friday-expect-a-partly-cloudy-weekend-into-next-wee/) - Thursday Update: More light showers are possible the next two days as a weak subtropical baggy trof spreads mainly high clouds throughout CA. .....The snow level will range from 6500 to 7,000 Ft. No significant accumulation expected. The weekend outlook for Saturday and Sunday shows Gusty Ridge Top winds as an upper ridge builds in. Winds will initially
- [Weather Becoming Unsettled this Week as the West Coast Upper Ridge gives way to two weak Subtropical Systems......Some Light Snowfall expected Tonight and Tuesday....Cooler Weather this Week....](https://mammothweather.com/2015/01/26/weather-becoming-unsettled-this-week-as-the-west-coast-upper-ridge-gives-way-to-two-weak-subtropical-systems-some-light-snowfall-expected-tonight-and-tuesday-cooler-weather-this-week/) - Record High temperatures were broken yesterday in many areas of Eastern CA. The combination of the lack of snow pack and high pressure aloft over Northern CA allowed these highs to be exceptionally greater than would have been, had we had a larger snow pack. Broken high temp records occurred in other areas as well
- [Modest Jet energy now moving through the High Country Aloft will spin up into an Upper Low over the weekend off the Baja Coast....As a Strong Upper High builds into CA Saturday and Sunday it will become quite mild in the High Country......Showers are expected Tuesday through Thursday....](https://mammothweather.com/2015/01/23/modest-jet-energy-now-moving-through-the-high-country-aloft-will-spin-up-into-an-upper-low-over-the-weekend-off-the-baja-coast-as-upper-high-builds-into-ca-saturday-and-sunday-showers-expected/) - Saturday AM: Latest Update 1-22-15 from DWP for the Mammoth Pass area is 18% of normal to date and 10% of normal for the April 1st average. According to DWP, we are very close to being dead even at this time with the drought year 1977. According to Bob Sollima, (Back Country Bob), there is only
- [While Split Trof moves through CA bringing high cloudiness....There is an interesting feature in the models about a week away.....](https://mammothweather.com/2015/01/20/while-split-trof-moves-through-ca-bringing-high-cloudiness-there-is-an-interesting-feature-in-the-models-a-week-away/) - The ever resilient ridge of high pressure is still hanging out over the far west keeping CA locked into a historic drought of middle age proportions. Really? Maybe.... I can not seem to get any straight answers for those in the know. I have heard 1200 year drought. I would love to see the data on
- [Variable High Cloudiness expected for the MLK Weekend....Temperatures to Remain Mild through the Holiday....Then Expect Cooler Weather Tuesday and Wednesday.....](https://mammothweather.com/2015/01/16/variable-high-cloudiness-expected-for-the-mlk-weekend-temperatures-to-remain-mild-through-the-holiday-then-expect-cooler-weather-tuesday-and-wednesday/) - Friday 1:25PM Comments.... Just had a look at some of the key teleconnections this afternoon. The PNA is currently positive and is why we have such strong ridging over the far west. However, in looking at the PNA by the 26th.... It is interesting to note that the 12z 1/16/15 ECMWF on the 26 of
- [Great Basin Slider will kick up some wind over the crest and down through the Owens Valley....However....The Short...Medium and Longer range is still dry for Central CA.......](https://mammothweather.com/2015/01/13/great-basin-slider-will-kick-up-some-wind-to-over-the-crest-and-down-through-the-owens-valley-however-the-short-medium-and-longer-range-is-still-dry-for-central-ca/) - Wednesday: Changes in the medium range models today and yesterday show a stronger ridge over the North Atlantic. Arctic Air that was proged to spill further west later in the month will now likely spill south, further east. This makes for a warmer west and colder east over the next 15 days. A true +PNA pattern over
- [Transition to (+PNA) Pacific North American Circulation Pattern underway with Ridge in the West and Trof in the East.....Short Wave System for Thursday will Weaken with clouds and some cooling....](https://mammothweather.com/2015/01/02/transition-to-pacific-north-american-circulation-pattern-underway-with-ridge-in-the-west-and-trof-in-the-east-short-wave-system-for-thursday-will-weaken-with-clouds-and-some-cooling/) - As of Saturday morning the 3rd.... A strong upper ridge is currently building with 500MB heights well into the 580s early next week. Strong Temperature inversions will be the theme. Expect highs this weekend in town climbing well into the 40s then 50s first half of the week. Winds will continue to be light. Early morning lows will
- [Happy New Year Everyone....It is cold in the High Country but relief is on the way.....](https://mammothweather.com/2014/12/31/happy-new-year-everyone-it-is-cold-in-the-high-country-but-relief-is-on-the-way/) - After a New Years Eve Day of teens and single digits, a new ridge will build in with a warming trend for the next several days. In fact high temps will climb into the 50s early next week. A new system will transit the sierra about the 8th of January with some light snowfall. Light winds will be the word
- [The Calm Before the Arctic Bowling Ball Upper Low.....Beautiful Weather with Highs in the 40s....Good Set Up Tuesday Afternoon and Night for Lake Effect Lee Vining Dumper!](https://mammothweather.com/2014/12/28/the-calm-before-the-arctic-bowling-ball-upper-low-beautiful-weather-with-highs-in-the-40s-good-set-up-tuesday-afternoon-and-night-for-lake-effect-lee-vinning-dumper/) - Tuesday Update: So Far No Lake Effect for Mono Lake Communities Lee Vining or Mono City reported..... Temperature and wind conditions favorable for it, however no surface convergence/250MB couplet. Well see what happens tonight.... Coldest portion of Arctic Air Mass over us this evening up until midnight, but temps will change little Wednesday. It will
- [Happy New Year From the Dweebs......The Cold Northerly Flow Aloft has shifted East a Bit...Temps have rebounded nicely in the High Country.....Next BC, Clipper will Tap even colder air as it dives south down the coast the next few days......Tuesday/Night/Wed will be Brutal Temperature Wise.....Long Range Models still hinting at Under Cutting By 2nd weekend of January..](https://mammothweather.com/2014/12/25/merry-christmas-and-happy-holidays-from-the-dweebs-cold-northerly-flow-aloft-with-keep-the-chill-on-in-the-high-country-while-the-next-storm-cycle-is-dubious-at-best/) - Saturday PM: Attn. Condo Managers Just looked at the new 12z ECMWF 700MB temps. The EC shows between -18C and -19C at 06Z Wednesday (Tuesday night). That's about -2F on the Mountain in free air. Tuesday will be very cold with a wind chill factor over the higher elevations. By Wednesday AM temps will be
- [Merry Christmas from the Dweebs.....Weather to turn blustry later today and tonight as Chilly NW Slider moves in quickly this afternoon....WX Pattern to Become More Amplified Next Week with Insider Slider Pattern likely.....](https://mammothweather.com/2014/12/24/mwrry-christmas-from-the-dweebs-weather-to-turn-blustry-later-today-and-tonight-as-chilly-nw-slider-moves-in-quickly-this-afternoon-wx-pattern-to-become-more-amplified-next-week-with-insider-sl/) - 1:53PM It's Currently Snowing in Mammoth Lakes!! Most QPF models are pretty much the same, calling for about 1/2 inches of moisture for this area of the Sierra. However, HPC is touting an updated 3/4 of an inch for the crest, Day 1 QPF. HPC has a habit of being a little on the "Wet Foot" side,
- [Winter Solstice has past....Monday is Winters 1st full Day...Christmas Eve/Day System looking stronger this evening as GFS Sides With ECMWFs Further Westerly Track....](https://mammothweather.com/2014/12/22/winter-solstice-has-past-monday-is-winters-1st-full-day-christmas-eveday-system-looking-stronger-this-evening-as-gfs-sides-with-ecmwfs-further-westerly-track/) - Christmas Eve: Snowfall Forecast 3 to 5 inches in town between 6:00PM and 1:00AM Christmas Day 5 to 8 inches over the upper elevations..... 1:10PM Tuesday Update: Models have come in a wee bit drier this morning but based upon QPF we should still get about 6 inches on the Mountain. 3" to 4" in
- [One more system to move through the Sierra Friday into Saturday...Then a fair weather stretch.....Christmas Day Storm still Lurking.....](https://mammothweather.com/2014/12/18/one-more-system-to-move-through-the-sierra-friday-into-saturday-then-a-fair-weather-stretch-christmas-day-storm-still-lurking/) - Saturday 12:30PM Mammoth Pass to date has "about" 3.5 inches of water in the rain tip for the season. Compared to "about" 4.5 this time last year. So this year we are still behind, water-wise last year at this time. A Quick update to indicate that Mammoth has indeed received between 1/2 and 3 inches
- [Mammoth Mt picked up another 12 to 18 inches last night....More on the way tonight into Wednesday.....and even the chance for several more inches Friday/Ngt.....Then a Break Next Week......](https://mammothweather.com/2014/12/16/mammoth-mt-picked-up-another-12-to-18-inches-last-night-more-on-the-way-tonight-into-wednesday-and-even-the-chance-for-several-more-inches-fridayngt-then-a-break-next-week/) - Thursday AM: Weather systems over the past 6 weeks have built up a base depth of between 2.5 and 4 feet over Mammoth Mt. All ski resort corridors are now open including Little Eagle, Canyon Lodge and the Main Lodge. The Dweebs expect a few more inches of snowfall Friday into Saturday before we ridge up
- [A Few More Systems this Week then a Break.......Eastern Sierra still stuck with the Split Flow Blues......](https://mammothweather.com/2014/12/14/a-few-more-systems-this-week-then-a-break-eastern-sierra-still-stuck-with-the-split-flow-blues/) - Tuesday Am Mammoth Mt Snow plot picks up about a foot over night...Here near the village about 6 inches.... Another 5 to 10 inches by Wednesday morning possible 3 to 5 in town... Monday PM: Latest QPF from HPC again going hog-wild with a 5 day Bull's-Eye total near the Mammoth Mtn Summit of 2.2
- [Storm System Winds Down Over CA.....Drops between 1 and 2 feet over upper elevations.....The Next Storm Tuesday, Although Weaker...May Bring More Snowfall Than todays](https://mammothweather.com/2014/12/12/storm-system-winds-down-over-ca-drops-between-1-and-2-feet-over-upper-elevations-the-next-storm-tuesday-although-weaker-may-bring-more-snowfall-than-todays/) - Saturday AM UPDATE QPF in the Models were drier over night. Possibly because the 2nd impulse is coming in with more of a split flow. CRFC paints about .9 for Yosemite and shows within QPF, the second impulse with much less contribution for the two storms. So the 1st system has the best SW flow and orographics. There is still
- [Powerfull Mid Pacific Jet Finally making its way into the Eastern Pacific with Strong Winds in the Mid and Upper Levels....Series of storms to continue into the following weekend.....](https://mammothweather.com/2014/12/10/powerfull-mid-pacific-jet-finally-making-its-way-into-the-eastern-pacific-with-strong-winds-in-the-mid-and-upper-levels-series-of-storms-to-continue-into-the-following-weekend/) - Thursday AM Update: EXTENDED OUTLOOK: Just had a peak at the new 00Z ECMWF Control and Ensembles. What is really nice to see and may I add different this year, is that although some storms are splitting a bit as they approach the central west coast, the systems are progressive. The Dweebs certainly hope that the pattern
- [Active Upper Jet Across the Pacific is Moisture Leaden.....Will take Aim on West Coast Thursday...Main QPF to Saturate Northern CA with diminishing amounts for Mono County.....However this system could still dump another 1 to 2 feet up on Mammoth Mtn by Friday Night.....Active Pattern to continue with more storms in Mammoth's Future the Following Week.....](https://mammothweather.com/2014/12/08/active-upper-jet-across-the-pacific-is-moisture-leaden-will-take-aim-on-west-coast-thursday-main-qpf-to-saturate-northern-ca-with-diminishing-amounts-for-mono-county-however-this-still-co/) - UPDATING......12-10-14 Models trending wetter........This looks like a good old fashion Mammoth Storm.....will up date Wednesday,,,,,,,,,,,,,,, Tuesday AM Update: Strong Upper Jet of 180Knotts at 300MB will drive the first powerhouse storm in two years into the high country. The system has plenty of moisture and dynamics to dump a good 3 feet
- [Moist Westerly Flow to offer Variable Cloudiness for the Central Sierra.....Weak splitting systems to dust the upper elevations with Light Snowfall...Upper EAJ to return later next week......](https://mammothweather.com/2014/12/05/moist-westerly-flow-to-offer-variable-cloudiness-for-the-central-sierra-weak-splitting-systems-to-dust-the-upper-elevations-with-light-snowfall-upper-eaj-to-return-later-next-week/) - Brief Update shows a retraction to the EAJ to the west coast. However.....weak ridging and areas of clouds and moisture will continue flowing through the high country. A couple of weak splitting systems may bring a dusting to a few inches of snowfall...mainly to the upper elevations tonight and again Monday. Next Storm cycle next Thursday. High
- [1 to 2 feet on Mammoth Mtn now with some additional accumulations possible today through Thursday AM....Earlier Forecast of 2 to 3 feet over the Upper Elevations still in Sight!](https://mammothweather.com/2014/12/03/1-to-2-feet-on-mammoth-mtn-now-with-some-additional-accumulations-possible-today-through-thursday-am-earlier-forecast-of-2-to-3-feet-over-the-upper-elevations-still-in-sight/) - Although Snowfall ended early last evening, more could still occur over the next 24 to 36 hours..... Mammoth is between two dynamic systems. One to the southwest associated with a very active subtropical jet and the other associated with a weakening closed upper low off the coast of Eureka, CA. That system is expected to
- [Heavy Snowfall now occuring in the Town of Mammoth with 4 inches on the ground......8 inches at Main Lodge.....More heavy snowfall expected tonight!](https://mammothweather.com/2014/12/02/heavy-snowfall-now-occuring-in-the-town-of-mammoth-with-4-inches-on-the-ground-8-inches-at-main-lodge-more-heavy-snowfall-expected-tonight/) - What is different this year....MJO wise. See: http://cawcr.gov.au/staff/mwheeler/maproom/RMM/phase.Last40days.html Last Year: http://cawcr.gov.au/staff/mwheeler/maproom/RMM/phase.1yearago.gif That's Right! We got MJO!! .....so far! Latest update shows a nice mid Latitude upper jet off Asia today that extends pretty far east through the eastern pacific. Toward the weekend, it does contract some what and so the Friday system splits and we
- [Moderate Winds over the upper elevations with very light snow falling at the 8200 foot level Sunday Evening.....Slower Evolution to storm system underway....Net result the same......](https://mammothweather.com/2014/11/30/winds-picking-up-over-the-upper-elevations-with-very-light-snow-falling-at-the-8200-foot-level-sunday-evening-slower-evolution-to-storm-system-underway-net-result-the-same/) - Comment: Nice Fetch developing out of the ITZ this afternoon. This fetch is getting juicer by the hour......Quite the rainfall event coming for LA Tomorrow/Night. Great news! But problems for the Foothill Burn Communities....for potential mud flows.... Monday PM Update: Some clarification due to phone calls today.... The biggest problem by far this morning is with
- [Storm system with two parts to slow down the next 5 days with first oppertunity of light snowfall Saturday/Night.....More significant precipitation expected early next week......](https://mammothweather.com/2014/11/26/storm-system-with-two-parts-to-slow-down-the-next-5-days-with-first-oppertunity-of-light-snowfall-saturdaynight-more-significant-precipitation-expected-early-next-week/) - Delay.....Delay...Delay.... That is what the models are doing with the large trough that will affect our area mainly Monday through Wednesday AM.... Here is the latest........ The models are slowing this storm down! 1. Both GFS and ECMWF are both slower now than yesterday. They are even slower on this mornings 12z Wednesday run VS last nights 18Z
- [Waiting....Watching the Transition....In the meantime...Over running over Northern/Central CA will end today as upper ridge builds into the Pacific NW...Fair and Dry With a warming trend for the High Country through Wednesday then Cooler into the weekend....With a chance of Precipitation by Weeks End.....](https://mammothweather.com/2014/11/23/waiting-watching-the-transition-in-the-meantime-over-running-over-northerncentral-ca-will-end-today-as-upper-ridge-builds-into-the-pacific-nw-fair-and-dry-with-a-warming-trend-for-the-high/) - As a caveat: This discussion is a forward looking out look for the 1st major storm of the season. In that it is about a week away, a lot can change with it. Better confidence is within a 5 day period with even more certainty within 72 hours. What can change? TIMING AND SNOWFALL AMOUNTS..... I
- [After a Dusting overnight, fair weather is expected Friday with increasing winds Friday Night....Chilly Windy showery weather Saturday then improving weather Sunday through Thanksgiving Day.......Then a chance of a Storm the following weekend.... ](https://mammothweather.com/2014/11/21/after-a-dusting-overnight-fair-weather-expected-friday-with-increasing-winds-friday-night-chilly-windy-showery-weather-saturday-then-improving-weather-sunday-through-thanksgiving-day-then-a-c/) - Saturday AM Update: Its windy and showery over the crest....High Wind Warning Currently in affect thru 7:00PM....No Surprise as the Dweebs have been peddling that idea the past week for today. What this update is all about is the MJO. It is going into Phase III. No matter what the CPC is chattering about over
- [An unsettled period is expected today through the weekend with light snowfall accumulations expected.....Snow levels will average above the Town of Mammoth......It looks quite Breezy to Windy Saturday/Night into Sunday AM.....](https://mammothweather.com/2014/11/19/an-unsettled-period-is-expected-today-through-the-weekend-with-light-snowfall-accumulations-expected-snow-levels-will-average-above-the-town-of-mammoth-it-looks-quite-breezy-to-windy-saturday/) - The Ridge Trof Pattern over the CONUS will continue through the Weekend with eastern pacific short waves (Areas of Rising Air) moving through the Mean ridge Position (Large N/S elongated area of sinking air) along the West Coast. In the meantime, the current Frigid Trof and cold air will flush east out over the northwest Atlantic and slightly open
- [Series of weak systems to move through mean ridge position this week.....Cold Temps great news for snow making on Mammoth Mountain....Mammoth Mountain opening up new trails...... ](https://mammothweather.com/2014/11/18/series-of-weak-systems-to-move-throgh-mean-ridge-position-this-week-cold-temps-great-news-for-snow-making-on-mammoth-mountain-mammoth-mountain-opening-up-new-trails/) - Record cold continues to grip the nations central and east with the highest snow cover for so early in November according to news agencies... Dr Ryan Maue of Weather Bell says it's the coldest across the country since 1976...some 38 years ago.... Looking at the analysis at 500MB, The Polar Vortex is located over the
- [Weak System Currently progressing through the West Coast Upper Ridge....Some light rainfall occuring this morning in the Town of Mammoth with about an inch of Snow over the upper elevations as expected.......A fair but Partly Cloudy Weekend is expected..... ](https://mammothweather.com/2014/11/13/weak-system-currently-coming-through-the-west-coast-upper-ridge-some-light-rainfall-occuring-the-morning-in-the-town-of-mammoth-with-about-an-inch-over-the-upper-elevations-as-expected-a-fair/) - Monday PM Will update late this afternoon.....Time permitting.. Thursday Am Update: New 12Z GFS has just finished running. The west coast ridge is a bit weaker on this mornings run. The Short Waves (Storms) for Tuesday/Wednesday and again early the following weekend are more progressive. This once again enhances the odds for
- [A Weakening Upper ridge will give way to some Unsetteled Weather Thursday with a fair and Partly Cloudy Weekend....Further weakening of the West Coast Ridge occurs Monday into Wednesday with Snow a good possibility Tuesday and Wednesday Next Week....](https://mammothweather.com/2014/11/11/a-weakening-upper-ridge-will-give-way-to-some-unsetteled-weather-thursday-with-a-fair-and-partly-cloudy-weekend-further-weakening-of-the-west-coast-ridge-occurs-monday-into-wednesday-with-snow-a-go/) - Wednesday AM: The AU Gov has come out and has forecasted the possibly of a moderate EL Nino by January. SEE: http://www.bom.gov.au/climate/enso/tracker/ We will need the enhancement by El Nino to strengthen the upper subtropical Jet or the southern branch of the polar jet enough to plow through a persistent developing west coast ridge. Especially In light of a winter-like
- [As Bering Sea Bomber Spins Up, So does the West Coast Ridge Build Up.....Record or Near Record Highs expected this weekend....Upper Ridge to both Sharpen then Retrograde Enough for Inside Slider Type Systems Next Week......WX To Continue Dry.....](https://mammothweather.com/2014/11/07/as-bering-sea-bommer-spins-up-so-does-the-west-coast-ridge-build-up-record-or-near-record-highs-expected-this-weekend-upper-ridge-to-both-sharpen-then-retrograde-enough-for-inside-slider-type/) - Saturday AM Comments: 1. Fridays High temp was 70 at the Ranger Station in town. That was the first 70 for that date breaking the previous record by 5 degrees in 2006. 2. Today Saturday is the last 70 ever recorded so late in the year. That occurred during the warm spell in 2006 3. The forecast high
- [Fair...Dry and mild this week with above normal temps by Thursday......The Blocking Pattern will Continue through Monday.....](https://mammothweather.com/2014/11/04/fair-dry-and-mild-this-week-with-above-normal-temps-by-thursday-the-blocking-pattern-will-continue-through-monday/) - Wednesday PM: OK.....What ever happened to the 8.5 feet forecasted by the CFSv2 for November? In that...that's not likely to happen now. A more important question is, in light of the Strong +PNA already established, what does it say today about the future? The 12Z run of the CFSV2 11/5 2014 shows about 6 inches of water through the
- [Winter Storm Warnings have been Hoisted for Mono County for this Evening Through Saturday AM.....Snowfall forecasts get ramped up again by models this morning......Storms arrival will be more toward this evening....Expect mild dry weather next week......](https://mammothweather.com/2014/10/31/winter-storm-warnings-have-been-hoisted-for-mono-county-for-this-evening-through-saturday-am-snowfall-forecasts-get-ramped-up-again-by-models-this-morning-storms-arrival-will-be-more-toward-t/) - Sunday AM Total Precipitation 1.72 as reported by the Sesame site.....13 inches of base. The Upper Mountain which was colder probably had about 18 inches up in the Bowls..... Early morning low here at Mammothweather was 16 degrees this morning and it was 31 at 10:00AM With long wave ridging setting up over the far
- [1st Winter Storm Watch for Mono County Friday Night for 6 to 12 inches of snow in the Town of Mammoth....Expect between a 12 to 18 inches over the Crest. ](https://mammothweather.com/2014/10/30/1st-winter-storm-watch-for-mono-county-friday-night-for-6-to10-inches-of-snow-in-the-town-of-mammoth-expect-between-a-12-to-15-inches-over-the-crest/) - Thursday 12:00 Noon: Latest HPC guidance has finally picked up better on the split with more energy in the southern Branch as compared to last Tuesday. WSFO RNO doing a good Job! Could see a foot in the Slopes by Saturday.....and about 18 inches over the higher elevations.... The Dweeber..... From this
- [Warmer Weather the next Two Days with Light Winds and PC skies...Winds beginning to come up Firday with a Chance of Snow Friday/Night.....](https://mammothweather.com/2014/10/27/warmer-weather-the-next-two-days-with-light-winds-and-pc-skies-winds-beginning-to-come-up-late-thursday-with-a-chance-of-snow-fridaynight/) - Wednesday AM Update: 1. Splitting Trof off the pacific northwest Thursday night will shift most energy into Mono County Southward. Even Los Angelus will get rain now from this storm. Snowfall in the high country will average a foot over the crest with 3 to 6 inches for the Towns of Mammoth and June. Friday
- [Windy Today...Chilly Sunday then Fair and Mild Next Week.....1st Snow Bearing Clouds for the TOML Expected Next Weekend.....](https://mammothweather.com/2014/10/25/windy-today-chilly-sunday-then-fair-amd-mild-next-week-1st-snow-bearing-clouds-for-the-toml-expected-next-weekend/) - Saturday AM... Upper Trof now making its way on-shore with Cold Front and Gradient ahead.... Some Light Showers possible this afternoon and evening. Main effect of upper trof is wind with wind advisories going into effect at 11:00am today Saturday with gusts to 55mph in town. It will remain windy through most of the evening.....
- [Westerlies continue to pick up strength as pressures aloft build into CA the next few days for some warming....Wet Pacific NW frontal system will sag south Friday leading to Breezy weather Friday Afternoon and stronger winds Friday night....Then light snowfall for the high country Saturday PM....Winter Outlook Looking wetter now for CA.... ](https://mammothweather.com/2014/10/22/westerlies-contine-to-pick-up-strength-as-pressures-aloft-build-into-ca-the-next-few-days-for-some-warming-wet-pacific-nw-frontal-system-will-sag-south-friday-leading-to-breezy-weather-friday-after/) - Thursday Midnight Special Update: Longer Range Global Models GFSX and ECMWF have a significant Storm System bringing the possibility of a foot+ of snowfall, the last weekend of October into the first few days of November. The GFSX is more progressive bringing it in the 31st of October while the ECMWF is slower with the system for
- [Series of Fall Trofs to continue their march into the west coast with longer wavelength causing some spliting Friday. Weekend looks Cool with near seasonal temps....Stronger more consolidated trof moving in by Monday night with strong winds possible...](https://mammothweather.com/2014/10/15/series-of-fall-trofs-to-continue-their-march-into-the-west-coast-with-longer-wavelength-causing-some-splitings-friday-weekend-looks-cool-with-near-seasonal-temps-stronger-more-consolidatd-trof-mov/) - The march of westerlies continue their trek eastward, with the pacific northwest the benefactor for precip. Although Northern California may get some light rain north of the Bay Area at times....Mammoth will remain dry. Temperatures in Mammoth will range from the low 60s, Thursday and Friday. It will be cooler Saturday (59)....then climbing to the upper 60s Sunday.
- [Get out this Weekend and take Some Fall Pictures.....The Fall Foliage has Peaked in the High Country and Potential Windy conditions are expected Later Tuesday and Wednesday. Winds will strip a lot of the Aspens Next Week..... ](https://mammothweather.com/2014/10/10/get-out-this-weekend-and-take-some-fall-pictures-the-fall-foliage-has-peaked-in-the-high-country-and-potential-windy-conditions-are-expected-later-tuesday-and-wednesday-winds-will-strip-a-lot-of/) - Friday AM Update: It will be slightly cooler today over yesterday with at least mid 60s in the forecast for Mammoth Lakes. The long wave upper high although weaker, will both retrograde westward later today and Saturday then expand into CA from well off shore. This will have the effect of bringing some warming back into
- [Slow cooling trend the next few days....Then back to the mid to upper 60s this weekend.....Changes still in the longer range next week.....](https://mammothweather.com/2014/10/08/slow-cooling-trend-the-next-few-days-then-back-to-the-mid-to-upper-60s-this-weekend-changes-still-in-the-longer-range-next-week/) - Today's guidance continued to show the upper ridge over the far west weakening and at the same time....more instability aloft. Not enough to warrant putting showers in the forecast but a few sprinkles might not be all that surprising. Heights aloft are probably a bit higher than climo and so temps today will still be
- [The near records high temps of the past weekend will slowly give way to cooler days by the end of this week......Upper Pattern over far west is still dry for the next 10 days...However there are some important changes as we move into the first half of next week........](https://mammothweather.com/2014/10/06/the-near-records-high-temps-of-the-past-weekend-will-slowly-give-way-to-cooler-days-by-the-end-of-this-week-upper-pattern-over-far-west-is-still-dry-for-the-next-10-days-however-there-are-some/) - About the Hunter Blood Moon and Eclipse Wednesday AM: October 8, 2014: Total Eclipse of the Moon. This lunar eclipses will be fully visible from Western North America (and Alaska and Hawaii), but observers in Eastern North America will only be able to see part of the eclipse before the Moon sets below the horizon. The Moon
- [An 8 to 14 day Extended Dry period is expected for the High Country with warmer than normal temps by the weekend......Based upon Weeks 1 and 2 Outlook...This should be a beautiful Fall Foliage Season up until Mid October....](https://mammothweather.com/2014/09/30/8-to-14-day-extended-dry-period-expected-for-the-high-country-with-warmer-then-normal-temps-by-the-weekend-based-upon-long-range-outlook-this-should-be-a-beautiful-fall-follage-season-up-until/) - Friday Update: It appears that the last Subtropical Ridge Building NW from Old Mexico is in Play. This type of Ridge is different than the ones that move in from the pacific. This is usually a late July through early September type pattern, with the exception of the fact that the SW monsoon is over.
- [Equinox Storm right on time with dry front moving through Mammoth by early Thursday PM followed by Upper Cut-Off like system Saturday...Some Snowfall Accumulation Likely over Higher Terrain.....](https://mammothweather.com/2014/09/25/equanonix-storm-right-on-time-with-dry-front-moving-through-mammoth-by-early-thursday-pm-followed-by-upper-cut-off-like-system-saturday-some-snowfall-accumulation-likely-over-higher-terrain/) - 8:15AM Saturday: As indicated Friday afternoon, the later guidance continued the trend of the upper center to move directly over the Mammoth area this morning, thereby setting up the area of deformation to the north of us. Areas like Lake Tahoe picked up about 1.25 inches of water EQ over night while only a few hundreds
- [Fall offically here now with more above normal temps expected Tuesday and Wednesday.....The First Fall trof of the season approaches California Thursday with a slow moving cool front expected over Northern Ca Thursday...The Cool Front will Creep through Mono County Early Friday Am as Upper Trof Cuts off over CA Saturday.... ](https://mammothweather.com/2014/09/22/fall-offically-here-now-with-more-above-normal-temps-expected-tuesday-and-wednesday-the-first-fall-trof-of-the-season-approaches-california-thursday-with-a-slow-moving-cool-front-expected-over-nor/) - The upper pattern over the CONUS will be highlighted by amplification, as a good moderate trof for this time of the year builds the upper ridge down stream over the countries mid section.. The upper trof has some chilly air in it as the numerical guidance has 500-1000 thicknesses down to about 558DM Saturday AM. That is good
- [The last days of Summer will have seasonal temperatures and sport a few showers as well.....Then as the first full day of Autumn next week occurs....Breezy with Cooler weather to follow....](https://mammothweather.com/2014/09/18/the-last-days-of-summer-will-have-seasonal-temperatures-and-sport-a-few-showers-as-well-then-as-the-first-full-day-of-autumn-next-week-occurs-breezy-with-cooler-weather-to-follow/) - The Seasons....they are a changing!.....the Autumnal Equinox arrives next Tuesday the 22nd at 7:29PM. So after Dinner Tuesday night...have a toast to the best Summer ever! Why? Because from what I have heard....It was the Summer that saved us from the Winter before! WX Discussion: Longer Range Forecasters know that when you get into the
- [Above Normal temperatures will continue both today and Tuesday with a few isolated Showers or Thunderstorms.....A modest trof of low pressure within the southern branch of the westerlies will bring a slightly better chance of some showers and cooling Wednesday into Thursday...The upcoming weekend looks fair....](https://mammothweather.com/2014/09/15/above-normal-temperatures-will-continue-both-today-and-tuesday-with-a-few-isolated-showers-or-thunderstorms-a-modest-trof-of-low-pressure-within-the-southern-branch-of-the-westerlies-will-bring-a/) - El Nino Update: Nino region 3.2 has reach the lower threshold of .5C and must stay that way through December 15th to officially be called El Nino. However, the heat below the surface from the Eq..... North of Hawaii to well east through the Nino Basin is once again impressive due to a Kelvin Wave of moderate strength. The
- [Above normal temps to continue for the high country this weekend.....Moisture again lurking from another tropical system to the SSE off Mexico.....](https://mammothweather.com/2014/09/12/abover-normal-temps-to-continue-for-the-high-country-this-weekend-moisture-again-lurking-from-another-tropical-system-to-the-sse-off-mexico/) - Highs this weekend near 80 in Mammoth! Record high from the past 15 years are in the upper 70s now for the Town of Mammoth. However, going back and using algorithm's adjusted for this time of the year for The Bishop AP out 60 years shows that Mammoth has had highs in the 80s this time of
- [Two weeks left of Warm Summer Weather....Then rolling into Fall..... How is the Crystal Ball Looking for Winter.....](https://mammothweather.com/2014/09/05/two-weeks-left-of-summer-then-rolling-into-fall-how-is-the-crystal-ball-looking-for-winter/) - Monday AM Update: Showers and a few thunderstorms rolled through the high county this morning. Mammothweather.com picked up .01 hundreds. More precip was possible today and this evening. This is part of the remains of Tropical depression Norbert. Temperatures will be cooler today with the absence of sunshine to a significant degree, then warm Tuesday and Wednesday.
- [The Month of August to end on a quiet note.....The Outlook is for more of the same with the week beginning with above normal temps then slightly cooler the 2nd half......It looks dry for the next 5 to 7 days....](https://mammothweather.com/2014/08/31/the-month-of-august-to-end-on-a-quiet-note-with-the-outlook-is-for-more-of-the-same-with-the-week-beginning-with-above-normal-temps-then-slightly-cooler-the-2nd-half-it-looks-dry-for-the-next/) - Thursday: SEE: Comments of ENSO today at Bottom. A stable dry northwest flow across the eastern sierra will continue the trend of sunny days and cool nights. High temps will warm a few degrees between Labor Day and Wednesday. Zephyr winds will range between 10 and 20 MPH. After mid-week, a weak broad trof will provide some
- [Temperatures over the Eastern Sierra definetly showing signs of becoming more variable as Polar Jet begins to flex its muscle over the higher Latts.....Fall like weather not that far off.....](https://mammothweather.com/2014/08/22/temperatures-over-the-eastern-sierra-definetly-showing-signs-of-becoming-more-variable-as-poler-jet-beginning-to-flex-its-muscle-over-the-higher-latts-fall-like-weather-not-that-far-off/) - A Northern Great Basin slider will bring the first shot of synoptic scale cooling to the Eastern Sierra as the stable weather pattern of July and early August gives way to a strengthening Polar Jet in the more Northern Latts.....Fall like weather has set in over many areas north of 60 N. The weather over the eastern sierra the next
- [Upper Level Low of the Southern CA Coast to get the Boot Thursday as Larger Synoptic Scale Trof moves though the Pacific NW....Warmer Early Next Week....](https://mammothweather.com/2014/08/20/upper-level-low-of-the-southern-ca-coast-to-get-the-boot-thursday-as-larger-synoptic-sale-trof-moves-though-the-pacific-nw-warmer-early-next-week/) - An area of showers and thunderstorms developed yesterday afternoon and lasted into the evening hours over Mono County. Although Mammoth just picked up a few light showers, accumulating precipitation occurred to the NNW of Mammoth. Todays air mass shows a slight increase in Precipitable Water. However as the day goes by, the divergence/convergence couplets now in
- [Upper Level Low Spinning up off the Northern CA Coast may bring some showers to the high country Tuesday PM.....Otherwise partly cloudy at times but dry weather this week into the weekend with seasonal temperatures.....](https://mammothweather.com/2014/08/18/upper-level-low-spinning-up-off-the-northern-ca-coast-may-bring-some-showers-to-the-high-country-tuesday-pm-otherwise-partly-cloudy-at-times-but-dry-weather-this-week-into-the-weekend-with-season/) - A weak upper level low was spinning up along the Northern CA coast this morning well NW of Mammoth and at the same time a weak upper jet was spreading some high cloudiness over our region. New 12Z 250mb Nam 212 shows strong divergence over the sierra from Southern Mono County south over the Northern portion of the Southern Sierra
- [Dry Southwest flow is the word for the next 5 to 7 days keeping Mammoth dry with near seasonal temps......Expect cooler nights now with the drier air....CFS forecasting more wet weather ahead for CA.........](https://mammothweather.com/2014/08/13/dry-southwest-flow-is-the-word-for-the-next-5-to-7-days-keeping-mammoth-dry-with-near-seasonal-temps-expect-cooler-nights-now-with-the-drier-air/) - Friday/Weekend Update: An upper level ridge of high pressure will build over the Eastern Sierra while a weak baggy trof remains off shore. This will continue the dry pattern over the eastern sierra while temperatures return to more seasonal levels. High temps in Mammoth will rise to the upper 70s this weekend with lows
- [North Central CA Coast upper trof to kick out Monday afternoon, leaving drier weather for the rest of the week.....The AZ Monsoon may be coming to an end.....](https://mammothweather.com/2014/08/10/north-central-ca-coast-upper-trof-to-kick-out-monday-afternoon-leaving-drier-weather-for-the-rest-of-the-week/) - Monday Night: Major air mass pattern change for much drier weather coming up as an eastern pacific trof sets up offshore with upper Jet currently bringing Thunderstorms to the Mammoth area shifting east. Once the Southwest flow develops, we'll experience dry weather with the usual afternoon and evening Zephyr winds along with chillier early morning
- [Old Upper Trof continues to weaken with the remains shearing out to the east today.........Looks like a bit of a break Friday, then the chance of thunder returns Saturday and Sunday.....](https://mammothweather.com/2014/08/07/old-upper-trof-continues-to-weaken-with-the-remains-shearing-out-to-the-east-today-new-upper-low-moving-in-from-the-west-may-re-energize-conditions-for-thunderstorms-friday-pm/) - Friday AM Update: From Incident Information System French Fire is now 90% contained! Woo Whoo! Majority of the heat continues to be in the north half of the incident, the southern portion of the fire consists mostly of isolated heat sources. There are still some areas where ground fire and isolated torching is occurring.
- [Weak remains of upper low nearing Fresno this afternoon with breeze shift expected from the east.....Thunderstorm threat increases today with the combo of sun and weak dynamics.....Drying coming in Friday leading to warm dry weekend......](https://mammothweather.com/2014/08/06/weak-remains-of-upper-low-nearing-fresno-this-afternoon-with-breeze-shift-expected-from-the-east-thunderstorm-threat-increases-today-with-the-combo-of-sun-and-weak-dynamics-drying-coming-in-fr/) - Short term: Small vort center is west of Mammoth is AM headed south to LA. This remains of the summer storm system that brought all the moisture over the weekend is continuing to weaken. However....With sunshine added to the mix today, residual moisture and Southern Mono Counties location in favorable NE quad of upper low/Vt
- [Upper Low near Central Sierra Crest this Morning will Orbit counter clockwise into Western NV first, then over Northern Ca, then down the West Coast....More Showers and Thunderstorms expected this week....](https://mammothweather.com/2014/08/04/upper-low-near-central-sierra-crest-this-morning-will-orbit-counter-clockwise-into-western-nv-first-then-over-northern-ca-then-down-the-west-coast-more-showers-and-thunderstorms-expected-this-week/) - Tuesday PM: Latest Guidance now shows a return of the southeast flow next Monday. This is about 4 to 5 days earlier than the models showed yesterday. We'll have to call this the Summer of Monsoon because we are racking up some big numbers now for the number of days of rain over Mono County as well as
- [Wind Shift has flushed out most of the moisture......However....Smoke from the west side has reached Southern Mono County.......Major Easterly Wave trending more west and north now....With Odds Increasing for Heavy Rainfall and potential flash flood conditions for the Owens Valley Sunday/Night.....Mammoth now included in this watch so stay tuned....](https://mammothweather.com/2014/07/31/wind-shift-has-flushed-out-most-of-the-moisture-however-smoke-from-the-west-side-has-reached-southern-mono-county/) - Quick Update: Sunday AM Wind shift has pushed smoke back to west side.... This will continue for the next 36 hours... Rains will begin either later this Am with more certainty this afternoon.. I do hope that Buddy Guy gets done by that time..... but that is dubious at best.. Flash Flood Watch in effect
- [Deep Monsoon Moisture in Place with an active pattern continuing for afternoon and evening Thunderstorms.....It should be a bit drier Thursday and Especially Friday.....](https://mammothweather.com/2014/07/29/deep-monsoon-moisture-in-place-with-active-afternoon-and-evening-thunderstorms-it-should-be-drier-thursday/) - 2:30PM update: Extensive cloudiness has effectively shut down the convective process over the Mammoth area. And......unless we can get a hour or two of sunshine this afternoon, the odds of any major flooding type rains are pretty slim. Thus the NWS has canceled the flash flood watch for Mono County. So far we have picked up
- [Monsoon III to make appearence by tonight with lots of mid level cloudiness....Moistening to continue through Monday....With Best Chance of Thunderstorms during Monday PM and again later in the week......Models Backpeddeling on SW Upper flow....With Unstable Air Mass continuing into next weekend](https://mammothweather.com/2014/07/26/monsoon-iii-to-make-appearence-by-tonight-with-lots-of-mid-level-cloudiness-moistening-to-continue-through-monday-with-best-chance-of-thunderstorms-during-monday-pm-upper-flow-to-become-sou/) - Tuesday: Deep moisture remains over the eastern sierra. Areas with good sun in the morning will benefit from the convection process (IE Surface heating) While there is no significant trigger today...scattered thunder will be heard in many areas, with plenty of rain showers. The latest guidance does show several Vort centers bubble up from the south. Thus
- [Upper Trof now making its way through California with lighter breezes expected Thursday along with warmer temps...This weekend will be especially nice with highs in the 80s and little if any chance of rain.....Monsoonal Flow returns Sunday-Monday......](https://mammothweather.com/2014/07/23/upper-trof-now-makings-its-way-through-california-today-with-lighter-breezes-expected-thursday-along-with-warmer-temps-this-weekend-will-be-especially-nice-with-highs-in-the-80s-and-little-if-any-ch/) - Friday Update: Currently, a weak upper low is west of Northern Baja reacting with the Continental High and Mammoth is in-between the two. This has spun up a weak 50 knot jet and is producing high clouds that is streaming through our area. This little feature will lift NE over Northern CA later today and
- [Fair dry weather returns to the high country this week with warm days and cool nights....The days get back into the low 80s by Thursday with further warming into the weekend.....It should be a dry week over all up untill Sunday....](https://mammothweather.com/2014/07/21/fair-dry-weather-returns-to-the-high-country-this-week-with-warm-days-and-cool-nights-the-days-get-back-into-the-low-80s-by-thursday-with-further-warming-into-the-weekend-it-should-be-a-dry-wee/) - A dry southwest flow has begun the drying process here in Mammoth. Daytime convection has moved east, and outside of some high clouds and a few puffy Cu....we expect to remain rain free through Saturday. Locally breezy weather with an enhanced Zephyr is expected the next few days. Daytime highs will remain in the mid 70s through
- [Forecast Models continue to Back Peddel on moving out residual moisture and so moisture to be recycled on a daily bases untill best SW flow Develops By Middle of Next Week......](https://mammothweather.com/2014/07/19/forecast-models-continue-to-back-peddel-on-moving-out-residual-moisture-and-so-moisture-to-be-recycled-on-a-daily-bases-untill-best-sw-flow-develops-by-middle-of-next-week/) - Sunday AM Update A line of thunderstorms have developed ahead of a vort center moving up the Owens Valley. The storms are likely to move into Mammoth Lakes shortly with rain, thunder, lighting and possible small hail. The impulse will shift north later in the morning through Mono County away from Mammoth after 10:15 am. Scattered
- [Very Moist Unstable Air-Mass to remain over our area through Thursday with the likelyhood of heavy rain showers high accordingly......A slow drying process to begin Friday with Areal Coverage of Thunderstorms decreasing through Saturday then fair and dry Sunday and next week.....](https://mammothweather.com/2014/07/16/very-moist-unstable-airmass-to-remain-over-our-area-through-thursday-with-the-likelyhood-of-heavy-rain-showers-high-accordingly-a-slow-drying-process-to-begin-friday-with-areal-coverage-of-thunde/) - With Dew Point in the low 50s....PWATs over an inch and favorable Kinematics, there is a high likelihood of Thunderstorms today and Thursday. Locally heavy rain is possible as well today and Thursday from Southern Mono County northward through Central Mono County and eastward to Esmeralda County. The National Weather service has issued a flash flood Watch for Mono County and
- [Thunderstorms to highlight the Forecast along with areas of locally heavy showers through Wednesday...Drying to begin Thursday with a fair, warm, dry weekend expected.....](https://mammothweather.com/2014/07/15/thunderstorms-to-highlight-the-forecast-along-with-areas-of-locally-heavy-showers-through-wednesday-drying-to-begin-thursday-with-a-fair-warm-dry-weekend-expected/) - Southeast flow and abundant moisture along with light winds will keep the thunderstorm threat high over Mono County both today and Wednesday. A vort center over Southern NV is stretched east west and will shift northwest into Southern Mono County later today and remain stationary through Wednesday Afternoon. Moisture and dynamics will increase through Wednesday afternoon. Thunderstorms are possible Today,
- [Dry Weather is expected over the Eastern Sierra through Monday with a Warming trend through Sunday......Monsoonal Flow Resumes Tuesday with an increasing chance of Rainfall for Mono County...](https://mammothweather.com/2014/07/11/dry-weather-is-expected-over-the-eastern-sierra-through-monday-with-a-warming-trend-through-sunday-monsoonal-flow-resumes-tuesday-with-an-increasing-chance-of-rainfall-for-mono-county/) - After a couple nice days of rainfall the weather will be dry here in the high country with a strong warming trend Through Sunday. High Temps by Sunday and Monday will be in the upper range of the mid 80s with lows in the low 50s. South-East flow and dynamics will return Tuesday through Thursday
- [Current Episode of Moist SE flow to begin diminishing by Friday leading to a fair warm weekend......In the meantime, High Country Showers and Thunderstorms possible, shifting a bit east Thursday...Then Dry Friday through Sunday](https://mammothweather.com/2014/07/08/current-epasoide-of-moist-se-flow-to-begin-dininishing-by-friday-leading-to-a-fair-weekend-warm-weekend-in-the-meantime-high-country-showers-and-thunderstorms-possible-shifting-a-bit-east-thursd/) - There has been a nice moist SE flow pattern over the Sierra the past few days...however little in the way of a trigger for heavy rain until today...Today looks to be the best day for some substantial rain over Mono County....With POPs as high as a 60% Chance! Scattered Thunderstorms will redevelop Wednesday.....However, without as
- [Dry SW Flow to Continue Thuough July Fourth With Moderate Zephyr Winds.....South-East Flow Develops later in the weekend as the AZ Monsoon Rapidly Shifts into High Gear Next Week..........](https://mammothweather.com/2014/07/03/dry-sw-flow-to-continue-thuough-july-fourth-with-moderate-zephyr-winds-south-east-flow-develops-later-in-the-weekend-as-the-az-monsoon-rapidly-shifts-into-high-gear-next-week/) - Scattered Thunderstorms the next few days then drier/warmer over the weekend.............................. Sunday AM Update: Our first shot of Monsoon Moisture arrived late yesterday afternoon as evidenced by Altocumulus advecting from the SE over the Sierra. Dew Points are up into the mid 30s now, and with strong daytime heating, extra lift and higher heights, isolated
- [Overall....A Very Warm Week Ahead Can be Expected for the Mammoth Area with Today being the Best Day for Thunderstorms...It will be a Slight Bit Cooler Wednesday into Friday with Thunder to make a return next week.......](https://mammothweather.com/2014/07/01/a-very-warm-week-ahead-can-be-expected-for-the-mammoth-area-with-today-being-the-best-day-for-thunderstorms-thunder-to-make-a-return-next-week/) - Wednesday AM: With the evolving ENSO state...the Dweebs read the latest discussion from the CPC in regards to weeks 1 and 2. Based upon the current Wheeler Hedon MJO chart, week 2 shows an emergence of amplitude in the Maritime Continent region suggestive of a weak negative height anomaly over the Pacific Northwest and weak trofing
- [Models Yo-Yo back to a warmer weekend....still no sustained southerly or southeast flow in our outlook....So any heat related Thunderstorms will be isolated next week.......](https://mammothweather.com/2014/06/24/models-yo-yo-back-to-a-warmer-weekend-still-no-sustained-southerly-or-southeast-flow-in-our-outlook-so-any-heat-related-thunderstorms-will-be-isolated-next-week/) - Thursday AM.... Surprise! Badly needed rains are falling in Mammoth Lakes. The short wave trof decided to come in further south than the models had predicted. The trof picked up on a subtropical plume located well North and west of Hawaii early this week. The plume was expected to only effect Northern Ca northward where
- [Back peddeling going on now with the idea of above normal temps in early July......Gulf of AK Upper Low  Anomalously strong will feed a series of short wave trofs to the west coast....bringing more wind to the high country later in the upcoming week and beyond. There is even the possibility of showers related to FROPA moving in from the pacific Thursday......Stay tuned.......](https://mammothweather.com/2014/06/22/back-peddeling-going-on-now-with-the-idea-of-above-normal-temps-in-early-july-gulf-of-ak-upper-low-anomalously-strong-will-feed-a-series-of-short-wave-trofs-to-the-west-coast-bringing-more-wi/) - What happening??? Week 1 and 2 models all have a pretty good storm hitting the west coast later this upcoming week and another the following week. The results will be some significant periods of wind for the high country beginning this Wednesday, a chance of showers and cooling for Thursday. In an earlier discussion a few weeks
- [Say Good-Bye to Spring today...the first day of Summer arrives Saturday with the Summer Solstice arriving at 3:51AM Local Time....High temps in Mammoth will waist no time at all getting into the low 80s by Monday-Tuesday next week....](https://mammothweather.com/2014/06/20/say-good-bye-to-spring-today-the-first-day-of-summer-arrives-saturday-with-the-summer-solstice-arriving-at-351am-local-time-high-temps-in-mammoth-will-waist-no-time-at-all-getting-into-the-low-8/) - As we say good by to Spring....The next transition will be from the current Spring like pattern of weak migratory trofs moving into the pacific NW, modulating our local Zephyr, to a pattern highlighted by a strengthening continental high over the four corner states. It is always fun to watch this transition from a global model point of view, as Climatology
- [MJO over Phase Four to begin weakening or progressing Toward Phase 5....Robust Trof to shift East out of Area Tomarrow to Insure a warm weekend......Winds To begin to diminish Wednesday.........July Fourth Holiday to be a Toasty One from an Interseasonal Perspective.....](https://mammothweather.com/2014/06/17/mjo-over-phase-four-to-begin-weakening-or-progressing-toward-phase-5-robust-trof-to-shift-east-out-of-area-tomarrow-to-insure-a-warm-weekend-winds-to-begin-to-diminish-wednesday-july-f/) - Wednesday AM: This mornings freeze qualified climatically as the last freeze of the season. The timing of that was right on with Fathers Day usually the last freeze. So the Climatology was great!. The Dweebs do not expect any more freezes in Mammoth Lakes at the 8000 foot level until fall now. However, that does not mean that we
- [Monday the Warmest Day...Then Scattered Thunderstorms to Rumble in Response to a small closed low arriving just at the right time Tuesday PM.......The MJO Maybe Ready to Kick Start El Nino Soon!!](https://mammothweather.com/2014/06/09/monday-the-warmest-day-then-scattered-thunderstorms-to-rumble-in-response-to-a-small-closed-low-arriving-just-at-the-right-time-tuesday-pm-the-mjo-maybe-ready-to-kick-start-el-nino-soon/) - Thursday AM: Wind developed overnight in the higher elevations with the top of Mammoth MT gusting to 55MPH at 7:00AM. This winds will get pulled down into Town later this AM as the daytime heating progresses. However, the winds forecasted for town will not gust much more then 40MPH. The very breezy weather will continue
- [Warming Trend to Begin Thursday.....Instability aloft will bring the Slight Chance of TSRWs Thursday &  Friday PM....Then a Fair Very Warm Weekend Ahead.........Cooler....Windy Weather to arrive by Middle of Next Week.....](https://mammothweather.com/2014/06/03/warming-trend-to-begin-thursday-instability-aloft-will-bring-the-chance-of-tsrws-thursday-pm-then-a-fair-very-warm-weekend-ahead-cooler-windy-weather-to-arrive-by-middle-of-next-week/) - Friday AM Update: Looks like Mammoth is ready for a couple of 80 degrees days both Sunday and Monday. However the cool down advertised is being pushed back a few days to the latter part of the week. Here is your high temperature forecast for Mammoth the next several days. Friday Sat Sun Mon Tue Wed Thurs (Friday through
- [Dry Weekend on Tap...Breezy in the PM with some afternoon clouds......Expect afternoon Cu build-ups next week with a few high based thunderstorms possible, Mainly East of Highway 395....](https://mammothweather.com/2014/05/30/dry-weekend-on-tap-breezy-in-the-pm-with-some-afternoon-clouds-expect-afternoon-build-ups-next-week-with-a-few-high-based-thunderstorms-possible/) - Sunday PM Update: The dominate upper feature over the far west is a strong and persistent upper subtropical high pressure system that is over NW Mexico that will shift west a bit over Central Baja next week. It will provide for above normal temperatures well into the new week. To the north, the westerlies have their own
- [The Week Ahead Looks Dry, Cooler and Breezy with a Slight Chance of Thunderstorms by Weeks End....High Temps to cool to near Normal late this Week.....](https://mammothweather.com/2014/05/26/the-week-ahead-looks-dry-cooler-and-breezy-with-a-slight-chance-of-thunderstorms-by-weeks-end-high-temps-to-return-to-near-normal-late-this-week/) - Tuesday AM Update: Looking down the road.... Here is an outlook for the next two weeks..... The Positive height anomaly in the Gulf of AK is forecasted to very slowly retrograde westward toward 160west over the next 2 weeks. Through the process, Upper troughing seems to have found a new home and so the clash of
- [Showers and Isolated Thunderstorms Ending Today with a Mostly Sunny Weekend....Warmer temps Ahead....Be sure to look toward the North Star about Midnight Friday Night!!](https://mammothweather.com/2014/05/22/showers-and-isolated-thunderstorms-ending-today-with-a-parlty-cloudy-weekend-warmer-temps-ahead/) - Friday AM Update: The storm system that brought the Showers yesterday has now moved into AZ. Expect a mostly sunny day today with some afternoon clouds and a slight chance of a shower. (See below for comments from Spaceweather.com for tonight's meteor shower.... ________________________________________________________________________________________________________________________________________ The cut off low over Southern California has continued to circulate moisture counter-clockwise
- [Cooler Breezy Weekend to be followed by Clouds....Showers and Possible Thunderstorms Tuesday and Wednesday, with some Upper Elevation Light to Possibly Moderate Snow as well......The Memorial Day Holiday Weekend Looks Fair and Warmer with highs well into the 60s......](https://mammothweather.com/2014/05/17/cooler-breezy-weekend-to-be-followed-by-clouds-showers-and-possible-thunderstorms-tuesday-and-wednesday-some-upper-elevation-light-to-possibly-moderate-snow-as-well-the-memorial-day-holid/) - Tuesday AM: No Real Changes from yesterdays discussion except to tweak the QPF and snow levels and raise temperatures over the Holiday Weekend. This AM's Snow level is verifying a bit lower at 6500ft. The freezing level was 7500 at 5:00AM. The SL will rise a bit this afternoon but remain as low as 7000-7500. Tonight,
- [More Warming then Cooling Periods Ahead as we head into the Warmer Half of the Year.....Warming Trend Now in Play then Cooler over the weekend.....one last snowfall possible before mid June......](https://mammothweather.com/2014/05/12/more-warming-then-cooling-periods-ahead-as-we-head-into-the-warmer-half-of-the-year-warming-trend-now-in-play-then-cooler-over-the-weekend-one-last-snowfall-possibe-before-the-end-of-of-may/) - Friday PM Update: Latest Guidance today from the GFS and ECM gives Mammoth Mt 6 to 9 inches of Snow Middle of next week.....Now that's Significant!! Better wax-up up if you're coming for the Holiday! Prepare for an upcoming Meteor Shower over the Memorial Day Holiday Weekend....If you coming to Mammoth for the Holiday,
- [Best Fishing Opener in Years.......Open Winter Waters....Warmer then normal SSTs and Waining Moon Cited......The Weather this week will be Spectactular with record highs by Weeks end......More Stormy Weather expected in May.......](https://mammothweather.com/2014/04/28/best-fishing-opener-in-years-open-winter-waters-warmer-then-normal-ssts-and-waining-moon-cited-the-weather-this-week-will-be-spectactular-with-record-highs-by-weeks-end-more-stormy/) - It is amazing how quickly the snow melts in town in late April. We can lose a foot+ a day of fresh fallen snow. This weeks Weather is highlighted by a strong upper ridge of high pressure building into the west coast today with the upper jet popping into Canada by tonight. The north-west upper jet as expected
- [Massive Dump Leaves 20 inches at the Village at Mammoth and 28 to 40 inches on Mammoth Mountain....Increasing Clouds Today Along With Breezy Conditions Expected Through Sunday....Warmer Weather on the Way.....](https://mammothweather.com/2014/04/26/massive-dump-leaves-20-inches-at-the-village-at-mammoth-and-28-to-40-inches-on-mammoth-mountain-increasing-clouds-today-along-with-breezy-conditions-through-sunday-warmer-weather-on-the-way/) - MONDAY AM UPDATE: Although the Fishing Opener was cold.....Best action reported in several years!!!! Combination of waning moon and open waters most of the winter.....warmer SSTs.... highlighted the great Fishing! Bottom Line......The fish were hungry! Great week of weather shaping up.....enjoy it while you can......Winters Grip may return the following week in the month of May! More
- [One Last Good Sized Storm for April to roll in Friday Morning with heaviest amounts During the Afternoon through Early Saturday AM......](https://mammothweather.com/2014/04/24/one-last-good-sized-storm-for-aprial-to-roll-in-friday-morning-with-heaviest-amounts-during-the-afternoon-through-early-saturday-am/) - 5:30PM Update: Heavy convective snowfall still continues in the Mammoth area with amounts near 18 inches at that main lodge now and an estimated 2 feet over the sierra crest. Therefore considering snowfall rates in the 2 inches per hours range, with another good 6 hours of it to go, expect between 2+ to 3 feet overall from
- [Fair and warmer the next two days then the last Storm of April to roll in Friday AM.....Although it will be a cold opener....Warmer weather is on the way beginning Sunday then well into Tuesday.......](https://mammothweather.com/2014/04/23/fair-and-warmer-the-next-two-days-then-the-last-storm-of-april-to-roll-in-friday-am-although-it-will-be-a-cold-opener-warmer-weather-is-on-the-way-beginning-sunday-then-well-into-tuesday/) - Wednesday PM Update: there are a lot of opinions several of the Dweebs out there, including forecasters' from the east coast to the west on what this storm is going to do. The QPF from HPC is deafening with amounts suggestive of 2.4 inches which is pretty amazing but not unusual for the Fishing
- [Expect 5 feet of Wind and a few inches of Snow from the Tuesday system then fair and warmer Wednesday into Thursday before the next system moves in Early Friday into Saturday.....Longer Range Discussed....](https://mammothweather.com/2014/04/21/expect-5-feet-of-winds-and-a-few-inches-of-snow-from-the-tuesday-system-then-far-and-warmer-wednesday-into-thursday-before-the-next-system-moves-in-friday-into-saturday-longer-range-discussed/) - Tuesday AM UPDATE: FROPA occurred about 8:00am this morning and the period of moderate snow has ended as well. It was nice to see some snow falling as it has been a while since that has happened. Mammothweather.com picked up close to an inch of snow while the roads being warm from the past
- [A Splitting Trof along with small upper closed low will kick off a few showers later this afternoon and evening......The weekend weather will bring a mixed bag of Sun...Clouds and Some Isolated showers Saturday then warmer Temps by Sunday into Monday.....A more active pattern develops later next week......](https://mammothweather.com/2014/04/18/a-splitting-trof-along-with-small-upper-closed-low-will-kick-off-a-few-showers-later-this-afternoon-and-evening-the-weekend-weather-will-bring-a-mixed-bag-of-sun-clouds-and-some-isolated-shower/) - Sunday PM: It looks like the winds will be picking up Monday as the first in a series of short wave trofs begin their migration into California. The first system for Tuesday will really cool things down with highs Tuesday in the 40s, followings by nighttime lows in the 20s. The upper jet is mostly
- [Weak Upper Low moving on shore tonight will bring some showers today and Saturday......Tetrad Blood Moon Eclipse Begins at 12:07 AM PDT on the 15th.....](https://mammothweather.com/2014/04/11/weak-upper-low-moving-on-shore-tonight-will-brings-some-showers-today-and-saturday-tetrad-blood-moon-eclipse-begins-at-1207-am-pdt-on-the-15th/) - Sunday Am Update: An Eastern Great Basin Slider will bring cooling today along with gusty higher elevation Northerly winds. The upper ridge in back of the slider will build in Monday bringing about 10 degrees of warming over today's highs. The next weather system will move through the pacific NW Tuesday then into the Rockies
- [Temperatures will peak out today as Strong Upper Ridge has shifted over the Great Basin.....Weak Upper Low Approaching Southern CA may bring a few showers Friday......Above normal temps to continue into the following week.....](https://mammothweather.com/2014/04/08/temperatures-will-peak-out-today-as-strong-upper-ridge-has-shifted-over-the-great-basin-weak-upper-low-approaching-southern-ca-may-bring-a-few-showers-friday-above-normal-temps-to-continue-in/) - Thursday AM: The High temperature in Bishop was 85 yesterday...Mid 60s in Mammoth. Expect similar highs today with partly cloudy skies this afternoon. Latest Satellite motion shows quite a subtropical plum developing ahead of a Quasi mid latitude upper low about 31 North - 137W, it is tracking ENE and the latest WRF guidance will
- [Weak splitting System On the Way for Friday...Then Dry warmer weekend as High Pressure Aloft Builds In through early next week....](https://mammothweather.com/2014/04/03/weak-splitting-system-on-the-way-for-friday-then-dry-warmer-weekend-as-high-pressure-aloft-builds-in-through-early-next-week/) - Saturday AM: Quick Update to reflect that we have a little upslope going on this AM. NE flow coming into the Sierra, a product of both the upper trof exiting into AZ and the upper circulation around the high off shore that will be building in through Monday evening of next week. No measurable precipitation
- [ Mammoth Mt received up to a two foot dump of Platinum Powder last night.....More on the way later today and tonight.......](https://mammothweather.com/2014/04/01/mammoth-mt-received-up-to-a-two-foot-dump-of-platinum-powder-last-night-more-on-the-way-later-today-and-tonight/) - Tuesday Evening Update: Although conditions for high Snow to water ratios continue through Wednesday AM, it is unlikely that a foot of snow will fall tonight over the crest, and so the Dweebs Criteria for another Platinum-Powder-Alert is not there. However, 500MB temperatures over the area associated with the upper low will still be -27C
- [Storm System Now Approaching Mammoth will bring Snowfall over two periods........Both precip periods will bring higher Snowfall Ratios.....Fair warmer weekend is expected](https://mammothweather.com/2014/03/31/storm-system-now-approaching-mammoth-will-bring-snowfall-over-two-periods-both-precip-periods-will-bring-higher-snowfall-ratios-fair-warmer-weekend-is-expectd/) - Platinum Powder Alert continues for the high country for Tuesday Morning with a foot plus expected over the Crest. The Dweebs use the Crest because of the temperatures expected their in qualifying at for least 15:1 or better for the Ratios. Also needed is at least a foot+ of fresh....that is expected by Tuesday AM.
- [As one Storm exits.....The next is on the way for Monday and Tuesday......Platinum-Powder-Alert for Tuesday AM......Unsettled weather in the extended as well.....](https://mammothweather.com/2014/03/30/as-one-storm-exits-the-next-is-on-the-way-for-monday-and-tuesday-platinum-powder-alert-for-tuesday-am-unsettled-weather-in-the-extended-as-well/) - Sunday 5:00PM Snowfall 4 to 7 in town by 5:00 am Tuesday Monday night....8 to 12 inches over upper elevations Tuesday Am through Wednesday Night 3 to 6 in town....6 to 12 inches over upper elevations.... Short Term Tonopah Low may develop briefly early Wednesday AM (12Z) for a bit of a boost on
- [2 Major Winter Storms headed for the Sierra Saturday Night/Monday-Tuesday.......Platinum Powder Alert for Tuesday and Wednesday.......](https://mammothweather.com/2014/03/27/major-winter-storm-headed-for-the-sierra-saturday-into-the-night/) - Sunday AM: 12:22 Snowfall rates now 1 to 2 inches an hour. Back edge of front now moving east through San Joaquin Valley Lower end of snowfall estimates now likely for the Towns of Mammoth and June. Update Mid AM ---------------------------------------------------------------------------------------------------------------------------------------------- WINTER STORM WARNING IN EFFECT FROM 5 PM SATURDAY TO 5 AM PDT
- [Although this first storm system looks weaker now....The hits will keep on coming as moderate to possibly heavy systems line up for their move into CA](https://mammothweather.com/2014/03/25/although-this-first-storm-system-looks-weaker-now-the-hits-will-keep-on-coming-as-moderate-systems-line-up-for-their-move-into-ca/) - Thursday 1:00PM Fellow Dweeb Dan McConnel just texted me from the top of Mammoth Mt. He Indicated that there was almost 18 of fresh snow on top from the last storm.... Great News....! FYI: Just checked in with Joni Lynch at Marketing for Mammoth Mt. She indicated that Mammoth Mt still plans on being open until Memorial Weekend.
- [Beautiful Weekend with Springtime Afternoon Buildups....A Few Flurries during the late afternoon then a Fair and Warmer Sunday with still some build ups......Changes in the Pattern for Mid Week will bring Snowfall....](https://mammothweather.com/2014/03/22/beautiful-weekend-with-springtime-afternoon-buildups-with-a-few-flurries-later-pm-and-a-fair-and-warmer-sunday-changes-in-the-pattern-for-mid-week/) - Monday AM: No change to earlier thinking with the timing of the beginning of the precip into the high country early Tuesday evening. Snow Levels crash Tuesday night with snowfall accumulations good enough for a plow expected in the morning....then again in the late afternoon. The big change is in the longer range, with the system for
- [Last few Days of Winter Pretty Uneventful.....Windy  and cooler Today then Lighter Breezes through Tuesday.....Seasonal Temps expected From Wednesday through the weekend.....Next Chance of a storm the middle of next week...El Nino Beats On.........](https://mammothweather.com/2014/03/17/last-few-days-of-winter-pretty-uneventful-windy-and-cooler-today-through-tuesday-seasonal-temps-expected-from-wednesday-through-the-weekend-next-chance-of-a-storm-the-middle-of-next-week/) - Few Changes Today Wed..... Although it will be warmer today, there is a weak wave that will come through Friday/Night that might kick off some showers in the afternoon. Limited moisture and forcing will produce mostly cloudiness though, as there is not much upper jet support as well. ECMWF still has a good system forecasted for mid week,
- [Beautiful Weekend in Store.....Weather to become a bit unsettled next week with winds and cooling beginning Sunday Night into Monday.....Then stronger winds later in the week as NW or inside sliders develop.....The EPO index will dive the following week and along with the PNA.....Thus March may go out like a lion and into April....As long wave Trof sets up off the West Coast...Months End.......](https://mammothweather.com/2014/03/14/beautiful-weekend-in-store-weather-to-become-a-bit-unsettled-next-week-with-winds-and-cooling-beginning-tuesday-pm-then-stronger-winds-later-in-the-week-as-nw-sliders-develop-the-epo-inde/) - Sunday PM Update: Mammoth hits 62 degrees!!! Bishop's high still pending but will make a run to 80 by mid/late afternoon... With antecedent warmth in place from today near record highs.....Mondays NW west slider promises to really breeze things up..... Dry pattern to continue another week! Long Range still indicating wet end to the month of
- [Gusty East winds over the crest will subside later today and temps will begin to slowly move up......Much more warming is expected over the weekend......The outlook is dry for the next 7 days....](https://mammothweather.com/2014/03/13/gusty-east-winds-over-the-crest-will-subside-later-today-and-temps-will-begin-to-slowly-more-up-much-more-warming-is-expected-over-the-weekend-the-outlook-is-dry-for-the-next-7-days/) - Gusty East winds were still in play over the crest this morning. However, the weather system and its cold air advection and surface gradient will track away from Mammoth today and thus the winds will diminish throughout the day over sierra crest. Temperatures will warm into the upper 40s today with lows tonight in the teens and twenties.
- [Weak Tonopah Low to Spin Up later tonight for a slight chance of snow showers in the Early AM.....Best chance over the eastern slopes near Bishop.....Gusty North winds for the crest and Owens Valley Tonight and Tomarrow......Warmer this weekend for all areas then unsettled, cooler/ windy weather returning later next week.....](https://mammothweather.com/2014/03/11/weak-tonopah-low-to-spin-up-later-tonight-for-a-slight-chance-of-snow-showers-in-the-early-am-best-chance-over-the-eastern-slopes-near-bishop-gusty-north-winds-for-the-crest-and-owens-valley-t/) - Longer Range updated below...........................Thursday.. Wednesday AM: Small upper low along the South Central CA/NV border is associated with some cold air advection, However, so far just some mid level cloudiness is occurring. It is certainly colder this AM with temps in the low 20s. Today highs at resort levels will remain in the mid to
- [ Transitionary pattern over the pacific will initiate slow height rises over the West Coast next 12 days.....Another 2 or 3 unsettled periods for Central CA this week, then mostly dry next week](https://mammothweather.com/2014/03/04/transitionary-over-the-pacific-will-slowly-build-heights-over-the-west-coast-next-12-days-another-two-unsettled-periods-of-central-ca-this-week-then-dry-next-week/) - The current blocking high latitude upper high over Eastern Siberia will continue to shift west then weaken over the next 10 to 12 day....This according to the ECMWF 5 day means. Through this transition, a long wave trof slowly deepens between the Hawaiian islands and the dateline, with significant height rises occurring over the west coast. The warm
- [Mammoth Mt Storm Total 2 to 3 feet......For a two storm series total of 3 to 4 Feet.....Upper Low is Filling and will be out of Central Ca by this Evening.....](https://mammothweather.com/2014/03/01/mammoth-mt-storm-total-2-to-3-feet-for-a-two-storm-series-total-of-3-to-4-feet-upper-low-is-filling-and-will-be-out-of-central-ca-by-this-evening/) - Upper trof is now moving on shore over LA and taking the remains of the moisture with it. Lots of showers and thunderstorms in the LA area with a few real boomers!. With the upper blocking high exiting Alaska to Siberia, a flip in both the WPO and EPO will allow long wave trofing to reemerge
- [Storm System Currently In The Sierra W/Snowfall rates this AM about 2 inches per hour....Several Bands of Moisture Continue to be Enhanced by Upper Jet.................](https://mammothweather.com/2014/02/28/storm-system-currently-in-the-sierra-wsnowfall-rates-this-am-aboput-2-inches-per-hour-several-bands-of-moisture-continue-to-be-enhanced-by-upper-jet/) - Heavy Convective Snowshowers! Main Vort Center moves through at 4:00pm An Amazing 6'' snowfall in one hour!!!!! Yes, between 3:00pm and 4:03 PM at the main lodge 6 inches fell according to the Plot at the base lodge! This brings the total to 18 inches at the main lodge and most likely about 2
- [Biggest Storm in Two Years bears down on Southern Ca....Sierra Braces for Major Dump......](https://mammothweather.com/2014/02/25/its-almost-showtime/) - Thursday AM Update: Not much to add this morning.... I picked up 8.5 inches at the 8200 foot level and I understand that Mammoth Mountain picked up about a foot at the main lodge with up to 15 inches over the upper elevations. I personally estimate that with the water content and the colder temps,
- [Fair Weather, w/slightly warmer than normal temps through Tuesday with periods of high clouds and light winds....Break-through of the Westerlies looking more likely for later next week.....](https://mammothweather.com/2014/02/21/fair-weather-wslightly-warmer-than-normal-temps-through-tuesday-with-periods-of-high-clouds-and-light-winds-break-though-of-the-westerlies-looking-more-likely-for-later-next-week/) - Sunday Morning: MJO has made the jump to Phase space 7...thus unleashing the power of the Extended Asian Jet toward the west coast! All models working nicely together to bring the upper jet on shore over South Central California Wednesday night. CRFC just painted .70 to .75 for storm #1 with the snow level beginning
- [Breezy in Town and Windy over the upper elevations Wednesday but Dry....Slow warm up through Monday......Models Still Beating Westerlies Breakthrough Drum, Timing is toward the following weekend.....](https://mammothweather.com/2014/02/19/breezy-in-town-and-windy-over-the-upper-elevations-wednesday-but-dry-slow-warm-up-through-monday-models-still-beating-westerlies-breakthrough-drum-toward-the-following-weekend/) - Thursday AM: Not much to add from yesterdays discussion. The global models all have pretty much the same scenario with a break through of the westerlies next Wednesday night supported by the eastward progressing MJO into Phase Space 8. The EC this morning has two important waves for consideration. One Wednesday night the 26th and the other
- [Cooler Windy Weather Returns to the High Country....Some Snow Showers possible Late Tuesday Night into Wednesday AM...It will be dry and warmer over the weekend......Westerlies break through lurking by Months End.....](https://mammothweather.com/2014/02/18/cooler-windy-weather-returns-to-the-high-country-some-snow-showers-possible-late-tuesday-night-into-wednesday-am-it-will-be-dry-and-warmer-over-the-weekend-westerlies-break-through-lurking-b/) - Monday Night: A Zonal Flow will give way to a Northwesterly flow aloft mid-week, as heights rise out at about 140 West. This is a cooler and initially windy pattern, until about the Weekend when the upper ridge builds into California and really amplifies northward the following week' It will be at that time that forecasters will have to
- [Mother Nature Back Peddling now on Storm for Next week......Snowfall Yes.....Major Amounts now Very Doubtful........](https://mammothweather.com/2014/02/14/mother-nature-back-peddeling-now-on-storm-for-next-week-snowfall-yes-major-amounts-now-doubtful/) - Monday Night: A Zonal Flow will give way to a Northwesterly flow aloft mid-week, as heights rise out at about 138 West. This is a cooler and initially windy pattern, until about the Weekend as the upper ridge builds into California and really amplifies northward the following week' It will be at that time that forecasters will have to
- [High level Cloudiness Will Continue to Spill Over the Upper Ridge into Eastern CA.......It will be warmer today and about the same Friday....Upper Jet Sags South Saturday with High Winds expected Saturday PM](https://mammothweather.com/2014/02/13/high-level-cloudiness-will-continue-to-spill-over-the-upper-ridge-into-eastern-ca-it-will-be-warmer-today-and-about-the-same-friday-upper-jet-sags-south-saturday-with-high-winds-expected-satu/) - A beautiful day is expected throughout Eastern Ca with warmer temps and breezy conditions over the higher elevations. Highs in Mammoth will be in the mid to upper 50s the next two days with high clouds and strong breezy conditions over the upper elevations at times. There continues to be an impressive upper subtropical jet coming
- [Atmospheric River has shifted into the Pacific North West while Central and Southern CA are under a Subtropical Ridge.....Expect Warmer, then cloudy weather the next four days and Windy Weather Wednesday and Thursday......Unsetteled Weather is expected Saturday Night into Sunday AM.....Next Major Storm expected by middle of next week....](https://mammothweather.com/2014/02/11/atmospheric-river-has-shifted-into-the-pacific-north-west-while-central-and-southern-ca-is-under-a-subtropical-ridge-expect-warmer-then-cloudy-weather-the-next-four-days-and-windy-weather-wednesd/) - While the Pacific NW gets the Hose......The Southern Half of the West Coast gets Clouds, wind and Sun. The latest guidance shows a subtropical ridge building into California thorough Midweek and holding through Friday. The strong warm air advection pattern to our north will begin to sag south this weekend effecting Mammoth by Late Saturday night. Freezing
- [2 to 3 Feet of Fresh Snow Fell over the Weekend on Mammoth Mt....Expect improving weather this week with clouds....winds mid-week then a return of Unsettleld Weather by Sunday.....](https://mammothweather.com/2014/02/10/2-to-3-fet-of-fresh-snow-fell-over-the-weekend-on-mammoth-mt-expect-improving-weather-this-week-with-clouds-winds-mid-week-then-a-return-of-unsettleld-weather-by-sunday/) - As the weekend storm exits our area, drier, warmer weather is expected as a strong mid latitude ridge builds back into California through Friday morning. The upper ridge looks fairly dirty, so cloudiness associated with a storm track to the north of us, will come and go with time. Heights will be fairly high and
- [Wet Pattern to continue today then mostly end after midnight tonight.....Snow Level will fall to 7000 feet by midnight tonight....With an Anticipated 2 to 3 feet of Fresh Snow over the Higher Terrain....Mammoth Mountain will Expand its Skiing and Boarding to other Available Terrain.....](https://mammothweather.com/2014/02/09/wet-pattern-to-continue-today-then-mostly-end-after-midnight-tonight-snow-level-will-fall-to-7000-feet-by-midnight-tonight/) - Sunday PM: This is last update on this storm. The main thrust of the last wave is moving into the high country with increasing precip rates. Mammoth Lakes may pick up another .5 to .75 hundreds before the nights over. All with be snow on the mountain and turning to snow in town where some
- ["AR" still headed for Northern California.....Mammoth could get 3 to 4 inches of Water up on the Pass.....Saturday and Sunday....](https://mammothweather.com/2014/02/07/ar-still-headed-for-northern-california-mammoth-could-get-3-to-4-inches-of-water-up-on-the-pass-saturday-and-sunday/) - Sat 9:50pm Mammoth Pass reports 1.22 inches of precipitation so far and less than Yosemite. Temperature at 8200ft is 36 degrees, while at the main lodge it is 30. Snow level about 8400. Main Plume is nearing the north coast now and will be moving in shortly over the north coast. Precip rates will pick
- [Another Cold System will move through Thursday and Friday with warm advection pattern developing over the weekend.....Thus freezing levels on the rise over the weekend....](https://mammothweather.com/2014/02/04/another-cold-system-will-move-through-thursday-and-friday-with-warm-advection-pattern-developing-over-the-weekend-thus-freezing-levels-on-the-rise-over-the-weekend/) - 12:30PM Update: Just took a look at the; NCEP Rapid Refresh (RAP) initial 2-06-2014 1900Z Between that rapid update model and the valley radar it is evident that everything behind the front this morning has gone south and is now lighting up over the southern sierra. The upper jet probably remained too far off shore for
- [Heavy Snowfall Returns to the Sierra with 1 to 2 feet expected......Snow showers will continue post frontal today and then unstable air could keep them going through the weekend.....Colder weather expected over the next 5 days.....](https://mammothweather.com/2014/01/30/heavy-snowfall-returns-to-the-sierra-with-1-to-2-feet-expected-snow-showers-will-continue-post-storm-throug-the-weekend-colder-weather-expected-over-the-next-5-days/) - 12:3-Pm Update: WX front has moved through and scattered snow showers are now expected the remainder of the day. Next and last wave moves in later tonight with a period of moderate snow returning...... The Storm began pretty much as expected early this morning. Snowfall rates were enhanced by a couple of 850mb/250MB couplets over
- [While a Moderate Storm is brewing on the Horizon...Partly cloudy skies along with warmer daytime temps expected through mid week....](https://mammothweather.com/2014/01/26/while-a-moderate-storm-is-brewing-on-the-horizon-partly-cloudy-skys-along-with-warmer-daytime-temps-in-the-through-mid-week/) - Wednesday AM: Quick Update... Brief Tonopah surface low develops all snow for the Town of Mammoth after Midnight tonight. Thus amounts by Friday AM could be 6 to 9 inches with most of it by Thursday night... Amounts on Mammoth Mountain should be in the 12 to 18 inch class between 9K and 11K by
- [Another dry week ahead is expected for California while week two models still beat with the promise of some snowfall during the 1st week of February.....](https://mammothweather.com/2014/01/23/another-dry-week-ahead-is-expected-for-california-while-week-two-models-still-beat-with-the-promise-of-some-snowfall-during-the-2nd-week-of-february/) - Sunday AM: Storm for later next week still looks good....a foot plus up on the hill.....GFS has it starting earlier like Thursday....ECMWF is wetter with about 1.5 inches of water EQ. Stay tuned...will update daily.............. The Dweeber.........................:-) Saturday PM That's it! I have heard this silver bullet story again today....The media is quoting some
- [Upper Ridge to Remain Entrenched Over the West Coast for the Next Week.....A Small Upper Short Wave will bring some Cooling and Breeze Next Thursday/Friday......Comments about the Pattern.......](https://mammothweather.com/2014/01/18/upper-ridge-to-remain-entrenched-over-the-west-coast-for-the-next-week-a-small-upper-shlrt-wave-will-bring-some-cooling-and-breeze-next-thursdayfriday-comments-about-the-pattern/) - 9:30am Wednesday: GFS flips wet again with mini AR for Central Ca. during week 2. Don't buy into anything until it gets well into Week 1 Wednesday AM 7:30AM Following up on Last night's post below.....It is becoming more clear that the upper ridge currently in the PNA region will retrograde to about 130W to
- [Weather to remain warmer then normal and precipitation free through next Tuesday with just some high clouds Saturday Ngt and Sunday.....Change in the pattern coming up by 1st week of February.....](https://mammothweather.com/2014/01/15/weather-to-remain-warmer-then-normal-and-precipitation-free-through-next-tuesday-with-just-some-high-clouds-saturday-ngt-and-sunday-change-in-the-pattern-coming-up-the-1st-week-of-february/) - Friday PM Update: Flip Flopping Models a good sign that a change in the pattern is still in the works by end of January. Both Ensemble Control's of the 12z ECMWF and GFS Still indicated a change in the pattern the end of the month. Both have a System coming through the State.... So hang
- [Windy Weather on the Way...Cooler with Some Snow Showers Saturday/Night...Cooler Sunday then Warmer Next Week....](https://mammothweather.com/2014/01/10/windy-weather-on-the-way-cooler-with-some-snow-showers-saturday-cooler-sunday-then-warmer-next-week/) - Tuesday 3:00PM Flash!!!!!!!!!! Just saw the most vengeful break through of the Westerlies into the southern half of the State the end of the month in the ECMWF control Would be awesome if it came true......I doubt it but stay tuned over the next couple of days to see if she sticks....... There most definitely will
- [The Vortex................Please!](https://mammothweather.com/2014/01/08/the-vortex-please/) - Thursday AM: Just a note of something to possibly look forward to for next winter..... The CPC just released their ENSO outlook and it was indicated that their climate model consensus are showing an increasing chance of an El Nino for next Fall. Of Note: The majority of models predict that ENSO-neutral (Niño-3.4 index between
- [Another Dry Week ahead for California.......However some Light Snow showers possible later this week......Long Range Outlook still shows well below normal precipitation for California.......](https://mammothweather.com/2014/01/06/another-dry-week-ahead-for-california-however-some-light-snow-showers-possible-later-this-week-long-range-outlook-still-shows-well-below-normal-precipitation-for-california/) - Through the ugliness of the pattern, we should all be thankful of the great job Cliff Mann and Mammoth Mt has been doing, keeping so many acres open via snowmaking with good skiing and Boarding. I understand that skiers and boarders are coming from all areas of the west to ski Mammoth Mountain as ski
- [Persistance in the Current WX pattern to Continue Through the End of this Week............Some Changes in Store Next Week...............](https://mammothweather.com/2014/01/02/persistance-in-the-current-wx-pattern-to-continue-through-the-end-of-this-week-some-changes-in-store-next-week/) - Sunday AM Update: Highlights" Fridged air mass invaded North Dakota this morning and will make its way to Western Wisconsin by 6:00pm Local time. The coldest portion of the air mass arrives well after the Packers game is over. This is a timing issue and a good thing for the players and fans.... Don't get me wrong, it
- [2013 in California to End W/ Driest year on record for Several Areas...San Fransisco for one, Statistics Now....All the while there is no end in the Dry Spell at this time....](https://mammothweather.com/2013/12/31/2013-in-california-to-end-w-driest-year-on-record-for-several-areas-san-fransisco-for-one-statistics-coming-soon-all-the-while-there-is-no-end-in-the-dry-spell-at-this-time/) - Apparently the upper ridge is doing nothing but shifting east and west between 140W and 120W and sometimes flattening. If the upper ridge remains in this mode, all we can expect is either a mild pattern in its east mode with warmer then normal temps for this time of the year. In its west mode, shots
- [Clear Sailing through New Years Day.....then cooler possibly windy weather Friday into Saturday with a slight chance of showers Friday night and Saturday next week.......](https://mammothweather.com/2013/12/29/clear-sailing-through-new-years-day-then-cooler-possibly-windy-weather-thursday-and-friday-with-a-slight-chance-of-showers-friday-night-and-saturday-next-week/) - Monday AM: Dry WX to continue this week with a chance of a pattern change next week. The GFS has been trying to break some energy underneath the big upper ridge. No guarantees though....ECMWF has a little snow for us (Few Inches) around the 8th-9th) Otherwise it will probably be cooler and breezy next week as well. Remember.....in
- [Upper Ridge Parked Over California will Give Way to a Very Weak Coastel Slider.....Some extra wind over the Upper Elevations Friday Night and Slightly Cooler Temps Saturday......The Outlook is Still Dry Through Years End......](https://mammothweather.com/2013/12/26/upper-ridge-parked-over-california-will-give-way-to-a-very-weak-coastel-slider-some-extra-wind-over-the-upper-elevations-friday-night-and-slightly-cooler-temps-saturday-the-outlook-is-still-d/) - Saturday Night: It's been fun to watch the week two progs of the ECMWF, GEM and GFS. After looking at them for the past few days, they all have the pattern transiting toward retrogression. The key will be where the upper high closes off. I do not believe that we can tell at this point or
- [Upper Ridge Has Adjusted East enough to Lock us out of Storms for the next one to two weeks.....No Let up in Sight within the 14 day period......](https://mammothweather.com/2013/12/24/upper-ridge-has-adjusted-east-enough-to-lock-us-out-of-storms-for-the-next-one-to-two-weeks-no-let-up-in-sight-within-the-14-day-period/) - For the 7th time since Folsom Dam construction was completed in 1955, the reservoir has dropped below 200,000 acre-feet in overall storage. The capacity of Folsom Lake is approximately 977,000 acre-feet. The record low occurred in the Summer Fall of 1977...and was just below 150,000 acre feet. The Winter of 1976-77 was the driest year
- [Upper Ridge Strengthing over the the Far West......PNA begins to go positive.....So far....no meaningful let up in sight for a pattern change......may get worse before it gets better......](https://mammothweather.com/2013/12/24/upper-ridge-strengthing-over-the-the-far-west-pna-begins-to-go-positive-so-far-no-meaningful-let-up-in-sight-for-a-pattern-change-may-get-worse-before-it-gets-better/) - This is the Dweebs year end opinion edition: Part one: I guess I can say that that for the most part that all long range forecasts.... I mean all have gone 100% bust this Fall. So with that in mind.....I too have a prediction! I predict that for the most part, this Winter forecasts will have a 50-50 chance of
- [Cold Upper Low Now Exiting through Northern Mexico...Leaves some light snowfall in the Process...Gusty winds over the Crest....Cooler Temps......](https://mammothweather.com/2013/12/20/cold-upper-low-now-exiting-through-northern-mexico-leaves-some-light-snowfall-in-the-process-gusty-winds-over-the-crest-cooler-temps/) - Friday Update: official word 4 to 6 inches on Mammoth Mt..... storm total with snowmaking going on all day Friday and Saturday weather permitting.... Next update Tuesday AM..... Mammoth received some light snowfall Thursday. Although it was at the lower end of what was hoped for, about 2 to 3 inches accumulated here near
- [Weak little Subtropical Low Ejecting through Sierra This AM..... bringing a few showers ahead of Main Coastal Slider For late tonight into Thursday Night....A few showers are possible Friday Night as well.....Weekend to be partly cloudy with moderating Temps.....Then possible back door cold front Tuesday.......](https://mammothweather.com/2013/12/18/weak-little-subtropical-low-ejecting-through-sierra-this-am-bringing-a-few-showers-ahead-of-main-coastal-slider-for-late-tonight-into-thursday-night-a-few-showers-are-possible-friday-night-as-well/) - 10:39PM Thursday: According to Jan Null CCM As 2013 comes to an end it is very likely that this will be the driest "calendar year" in San Francisco since records began in 1849. So far only 5.59 inches have fallen since last January 1st; almost three-and-a-half inches less than the previous driest of 9.00" in 1917.
- [Very Mild Condition to Continue Through Tuesday then Cold Showery System expected for Late Wednesday Night through Thursday Night......Ridge Returns by Weeks End.......... ](https://mammothweather.com/2013/12/16/very-mild-condition-to-continue-through-tuesday-then-cold-showery-system-expected-for-late-wednesday-night-through-thursday-night-ridge-returns-by-weeks-end/) - Tuesday AM: It still looks like an upslope event. We seem to usually do better in upslope events as compared to how much snow is forecasted because of Mammoth Mt orientation to 700MB /NE flow. so 2 to 4 inches might to be conservative.... Opinion and food for thought...... Short, Medium and Long Range guidance are
- [Strong Inversions to Hold Through Weeks end with Milder Weather over the Weekend into Early Next Week......Another fridged system is lurking for Friday Next Week.....](https://mammothweather.com/2013/12/11/strong-inversions-to-hold-through-weeks-end-milder-weather-over-the-weekend-into-early-next-week-another-fridged-system-is-lurking-for-mid-week-next-week/) - Quick update: No Surprises.. Warmer weather the next few days then cold pattern to repeat with a couple of very cold California sliders bringing some light snowfall Thursday into Friday. Very cold temps with highs Thursday the 19th into the teens and 20s and lows in the zeros and single digits. possible snow showers Thursday. Maybe
- [Strong Inversions setting up over the Eastern Sierra as Warm Air Aloft moves in......Mono Lake Ice Fog leading to Pogonip Conditions for Lee Vinning and Mono City....Next weather will be about December 19th.......](https://mammothweather.com/2013/12/10/strong-inversions-setting-up-over-the-eastern-sierra-as-warm-air-aloft-moves-in-mono-lake-fog-leading-to-pogonip-condition-for-lee-vinning-and-mono-city-next-weather-will-be-about-december-19t/) - Yes folks...it that time of the year.....In December after an Arctic outbreak you often get strong temperature inversions.....This leads to poor air quality as wood smoke begins to collect on a daily bases. Temperature inversions also help to create the beautiful Pogonip often found in deep valleys like Long valley and or around Mono Lake. However....Sometimes this condition
- [Sierra Storm dropped 10 to 14 inches of Powder on Mammoth Mtn....Snow Showers will Continue Today.....It will be Milder by Mid Week........](https://mammothweather.com/2013/12/07/sierra-storm-dropped-10-to-14-inches-of-powder-on-mammoth-mtn-snow-showers-will-continue-today/) - Sunday AM Update: Cold......Cold...... Yesterday's high temp briefly peaked at 15 degrees. However most of the day ranged between 10 to 14 degrees. Winds in town were clocked 25 to 30mph with gusts to 52 MPH. Hence wind chill's ranges from -5 to -15 all day! Early Sunday morning temps were colder then a snakes vest button
- [Yuletide Season Approaches.....Still No -NAO or -AO in Sight.....-WPO and -EPO to Rule West Coast Weather into the New Year and possibly beyond.....](https://mammothweather.com/2013/12/05/yuletide-season-approaches-still-no-nao-or-ao-in-sight-wpo-and-epo-to-rule-west-coast-weather-into-the-new-year/) - Friday Update: Mammoth temps Highs 20s today and teens Saturday.....low 20s Sunday Lows below Zero Sunday AM again..... Warmer Next Week: Not much change but to slow the current system down 6 to 8 hours. QPF is slightly less than the previous storm but we'll get more snow because it will be colder during the
- [7 to 10 inches of Fresh Powder on Mammoth Mtn......More on the way!   ](https://mammothweather.com/2013/12/04/7-to-10-inches-of-fresh-powder-on-mammoth-mtn-more-on-the-way/) - Quick update for the Friday-Saturday Storm. Storm still looks very similar to the last system, except it will be colder and the snow lighter.....so it will snow more. Liquid EQ would be about .5 over Yosemite and probably . 7 or .8 over Mammoth Pass. The Dweebs still feel at this time that about a foot
- [After a Quick Shot of Light to Moderate Snowfall Tuesday....Modified Arctic Air Invades the High Country Mid Week and Stays into the following Weekend......](https://mammothweather.com/2013/11/30/after-a-quick-shot-of-light-to-moderate-snowfall-tuesday-modified-arctic-air-invades-the-high-country-mid-week-and-stays-into-the-following-weekend/) - Tuesday Evening Update: Upper trof axis slowed as it moved through Mono County as forecasted. At the moment the axis is near Lone Pine and will remain over the Owens Valley moving at a snail's pace through the early morning hours.....reaching Kern County 12Z. Another ripple moves through in the northerly flow late Wednesday for another
- [Weakening system over the southland may give some snowshowers Thanksgiving day and night....Cold Arctic System makes its way into the Pacific Northwest with Arctic air to Accompany....Snowfall may begin as early as Monday for the Mammoth Area.....](https://mammothweather.com/2013/11/27/weakening-system-over-the-southland-may-give-some-snowshowers-thanksgiving-day-and-night-cold-arctic-system-makes-its-way-into-the-pacific-northwest-with-arctic-air-to-accompany-snowfall-may-beg/) - Wednesday AM Update: The Thanksgiving holiday weather looks mostly cloudy with a slight chance of snow showers both during the day and night. Daytime highs in the 40s and nights in the teens and twenties. The rest of the weekend look party cloudy with little temperature change. Winds will be light...... Last several runs (Tuesday and
- [Major Snow Storm for the Sierra now in the cards for first half of Next Week.......Hang On!!](https://mammothweather.com/2013/11/25/major-snow-storm-for-the-sierra-now-in-the-cards-for-first-half-of-next-week-hang-on/) - Tuesday PM Update: 12z model runs out with GFS still bullish with plenty of over water trajectory. 12z ECMWF has less over water buckling on its deterministic run than last night and yesterday. So it is not as wet. Will update as soon as the new 06z GFS run is finished.... Confidence still plenty good
- [Upper Ridge Building in Now for a Couple of Days...Warmer Days in the Upper Elevations expected through Tuesday with cloudiness increasing Wednesday for a slight chance (20%) of some very Light Snowfall Thanksgiving.......](https://mammothweather.com/2013/11/24/upper-ridge-building-in-now-for-a-couple-of-days-warmer-days-in-the-upper-elevations-expected-through-tuesday-with-cloudiness-increasing-wednesday-for-a-slight-chance-20-of-some-very-light-snowfal/) - ------------------------------------------------------------------------------- Monday AM Update: As indicated a few weeks ago, the Dweebs indicated that a major pattern change would begin to occur about the end of November. However, it was also indicated that it was not known if the pattern would be a wet one. Here is what we know. 1. Here is the
- [Storm total 12 to 14 inches......Very Light upslope today is not expected to add much the next 36 hours as upper cut off gets the Boot ENE....More Snow Possible for Thanksgiving....](https://mammothweather.com/2013/11/22/storm-total-12-to-14-inches-very-light-upslope-today-is-not-expected-to-add-much-the-next-36-hours-as-upper-cut-off-gets-the-boot-ene-more-snow-possible-for-thnksgiving/) - Saturday AM Update: This will be brief... The Upper Cut-Off has kicked inland along the Baja/CA border and is moving quickly into AZ. Cloudiness will be quicker to more out today and tonight. Fair weather is expected Sunday through Tuesday with a slow warm up. Next system will not be anything to write home about.
- [Up to a foot of fresh has fallen on Old Woolly.......More on the way.........](https://mammothweather.com/2013/11/21/up-to-a-foot-of-fresh-has-fall-on-old-woolly-more-on-the-way/) - Thursday AM Update: Storm total as of this morning as reported by Mammoth Mountain was 7 to 11 inches....pretty much in line with what the Dweebs forecasted....which was 5 to 10 inches then increased to 8 to 12 inches yesterday AM. We still may squeeze out another 2 to 4 inches from the next system as the flow at 700mh switches and
- [Mammoth Mountain Reports 4 to 6 inches of fresh snowfall overnight.....another 4 to 6 inches likely by Thursday.......Main portion of storm to move in late today......Snowfall expected Tonight into Thursday morning then showery weather into Thursday Night with Upslope Snowfall.....](https://mammothweather.com/2013/11/20/mammoth-mountain-reports-4-to-6-inches-of-fresh-snowfall-over-night-another-4-to-6-inches-likely-by-thursday-main-portion-of-storm-to-move-in-late-today-snowfall-expected-thursday-morni/) - Thursday AM Update: Storm total as reported by mammoth Mountain is 7 to 11 inches....pretty much in line with what the Dweebs forecasted....which was 5 to 10 inches then increased to 8 to 12 yesterday AM. We still may squeeze out another 1 to 3 inches from the next system as the flow at 700mh switches and becomes
- [Confidence increases that some light snowfall now possible Tuesday into Wednesday with another system bringing some additional accumulation Thursday/NGT](https://mammothweather.com/2013/11/17/confidence-increase-that-some-light-snowfall-now-possible-tuesday-into-wedensday-with-another-system-bringing-some-additional-accumulation-thursdayngt/) - 2:10PM Update: CRFC showing Precip to hold off until tonight... Tuesday Am Update: Everything looking good for at least 5 to 10 inches of snowfall over the higher terrain by Thursday Morning.....Then we get what were going to get from the split-flow, spun up low heading SE down the coast Thursday/NGT. I would not
- [Breezy Day Today....With somewhat milder temps....Dry weather will continue through Monday....Mid latitude low weakens but makes its way to the Sierra by Tuesday for some light upper elevation snowfall followed by the chance of another wave on its Heals........](https://mammothweather.com/2013/11/16/breezy-day-today-with-somewhat-milder-temps-dry-weather-will-continue-through-monday-mid-latitude-low-weakens-but-makes-its-way-to-the-sierra-by-tuesday-for-some-light-upper-elevation-snowfal/) - Saturday AM Update: Temps were certainly milder last night than what was earlier expected. Overnight lows were near freezing here near the village. It will be colder tonight. The Winds had much to do with the mild night but so did the invading air mass. As mentioned in the previous discussion, there is the cut
- [It's all about Blocking!!.......Chilly Weekend better for round the clock snow-making today into Saturday.....Milder Weather the end of the Weekend to be Followed by a Weak System Mid Week.....](https://mammothweather.com/2013/11/15/its-all-about-blocking-chilly-weekend-better-for-round-the-clock-snow-making-today-into-saturday-milder-weather-the-end-of-the-weekend-to-be-followed-by-a-weak-system-mid-week/) - Yes it's all about blocking! Where the blocking sets up and how you relate geographically.....Simplistic but true.... It's mid November and it is getting to be that time of year when forecast model accuracy takes a significant jump to the better. Over the past few weeks, medium and long-range guidance has been awful. It's not the weathers fault, it's the
- [One More Quiet Day Today then Cold Slider Pattern to Develop Thursday Night with one-two punch.....Coldest slider to flush through Saturday Night.......Outlook still dry with milder temps returning later next week....](https://mammothweather.com/2013/11/13/one-more-quiet-day-today-then-cold-showery-slider-pattern-to-develope-thursday-night-with-one-two-punch-coldest-slider-to-flush-through-saturday-night-outlook-still-dry-with-milder-temps-ret/) - Thursday AM Update: No sensible changes in the short term forecast, just cold on the way. Little change in the medium and long-range charts. Odds are strongly against any meaningful precipitation before Thanksgiving. Short term is most positive for snow making as a couple of dry cold fronts sweep through our area this weekend. Oddly enough the first
- [Very Quiet Week Ahead with it being Very Mild the first half....Then a few inside sliders during the 2nd half to chill it down some.....Long Range Models looking Pretty Dry for much of November......](https://mammothweather.com/2013/11/11/very-quiet-week-ahead-with-it-being-very-mild-the-first-half-then-a-few-inside-sliders-during-the-2nd-half-to-chill-it-down-some-long-range-models-looking-pretty-dry-for-much-of-november/) - Quick Update Tuesday Afternoon: The new 18Z GFS is trending back to an inside slider while the 12z run of the EC is most consistent as a Great Basin slider. So for the time being this is a cold dry system with some snow showers at best for the weekend. It will definitely be cold! ----------------------------------------------------------------------------------------------------------------------------- Tuesday
- [Back Peddling Continues as Central Pacific Upper Ridge now Forecasted to Set Up Too Far West......Major Storminess for the Central Sierra Now Unlikely Mid Week.....](https://mammothweather.com/2013/11/07/back-peddling-continues-as-central-pacific-upper-ridge-now-forecasted-to-set-up-too-far-west-major-storminess-for-the-central-sierra-now-unlikely-mid-week/) - Short term: Short wave passing to our north today has brought in a thin high cloud deck. However, 500MB heights are high enough for a few more degrees of warming. Additionally, 700MB winds will come up a bit today with gusts over the crest to at least 50 MPH. Local breezes will reach into the 25 to
- [Milder temps on the way today and Wednesday then gusty winds Thursday for the opener followed by a Fair Weekend with Seasonal Temperatures......Next Week we will get snow...Maybe......Timing possibly Mid-Week......](https://mammothweather.com/2013/11/05/milder-temps-on-the-way-today-and-wednesday-then-gusty-winds-thursday-for-the-opener-followed-by-a-fair-weekend-with-seasonl-temperatures-next-week-we-will-get-snow-timing-possibly-mid-week/) - Wednesday 5:30PM Here lies the problem.. See the Mean Height Anomaly at 175W: http://www.cpc.ncep.noaa.gov/products/predictions/610day/500mb.php 420DM at 52N-175W Here it is again in the 8 to 14 day outlook: About 390DM at 50N 180W It's moving in the wrong direction as the wavelength if correct will force ridging to develop near the west coast and most of
- [Chilly beginning of this week to be followed by Moderating Temps Wednesday with system to the north Thursday then Party Cloudy but Dry Weekend.....Increasing  snow pack with Wet Base Building Storms to begin possibly Middle of Next Week....](https://mammothweather.com/2013/11/04/chilly-beginning-of-this-week-to-be-followed-by-moderating-temps-wednesday-with-system-to-the-north-thursday-then-party-cloudy-but-dry-weekend-increasing-snow-pack-with-wet-base-building-storms-t/) - The Dweebs will continue this discussion later this morning.... A series of major storms look likely to hit the northern California Coast first next week with the storm track shifting south as the week progresses. A negative tilt upper high will set up east of the dateline and north next week with a full latitude long wave trof down stream over the
- [Cold Beginning to the First week of November with Inside Slider Pattern to Chill Out the High Country Sunday into Monday...Some Moderation in Temps by Mid Week...The Following Weekend Still Looks Unsettled](https://mammothweather.com/2013/11/02/cold-beginning-to-the-first-week-of-november-with-inside-slider-pattern-to-chill-out-the-high-country-sunday-into-monday-some-moderation-in-temps-by-mid-week/) - Saturday PM Both global models seem to be pushing off the storm now until a week from this Monday or Tuesday....Stay tuned.... ___________________________________________________________________________________________________________________________________ A change to colder weather is still in the cards for Sunday through Tuesday of the new week. This mornings model runs were even drier than yesterday which had at the least
- [A Nice Break in the Weather for the Little Goblins Thursday Night as High Pressure Builds over Central California Today into Friday......So far the Weather will be Dry But Cooler Sunday into Monday....](https://mammothweather.com/2013/10/30/a-nice-break-in-the-weather-for-the-little-goblins-thursday-night-as-high-pressure-builds-over-central-california-today-into-friday-so-far-the-weather-will-be-dry-but-cooler-sunday-into-monday/) - 10-31-2013 UPDATE No changes to the Short Term Forecast..... Fair and Sunny today for All Hallows Eve Temps today in the mid 50s then near 60 both Friday and Saturday. Tonight lows for the little goblins will be mostly low 40s but cooling to the upper 30s by 8:00pm. (With 700mb temps at or above +5c Thursday night through
- [Strong Cold Windy System on the Way.....Batten down the Hot Tub Covers Soon......Light Snowfall Begins after Midnight tonight with Light Snow Monday through the Night...Fair weather returns Wednesday through Sunday with Another System Worth Watching for the following Sunday......... ](https://mammothweather.com/2013/10/27/strong-coild-windy-system-on-the-way-batten-down-the-hot-tub-covers-soon-light-snowfall-beginning-after-midnight-tonight-with-light-snow-monday-through-the-night-fair-weather-returns-wednes/) - 10:20am Tuesday... Regarding the MJO's support for a pattern change later next week. The MJO is weak and not expected to provide modulation to the westerly's. However, both the ECMWF and GFS ensemble runs have a strengthening signal indicated in them. According to the CPC, this is due to other modes of tropical variability. Longer range GFS week
- [The last weekend in October to finish off on a warm note with increasing winds Sunday night leading to snowfall by Mid morning Monday......Forecast Models agreeing on a more westerly trek now with Signifacant Accumulations fo the Sierra Monday into Tuesday night.....](https://mammothweather.com/2013/10/26/the-last-weekend-in-october-to-finish-off-on-a-warm-note-with-increasing-winds-sunday-night-leading-to-snowfall-by-mid-morning-monday-forecast-models-agreeing-on-a-more-westerly-trek-now-with-sig/) - Models have come around to the thinking of the ECMWF (European model) that the system will take a more westerly trek with the upper jet enough off shore, allowing the Front Rt exit region to do its magic by providing lift and vorticity over and near the coastal waters of the far eastern pacific. This bodes well for more significant
- [October to Turn Colder Next Week as Western Canadian Short Wave Digs into Western Great Basin bringing a few inches of snow over the upper elevations of the Central Sierra.....Between today and the rest of the week enjoy Mammoth's Excellent Indian Summer Weather!](https://mammothweather.com/2013/10/24/october-to-turn-colder-next-week-as-western-canadian-short-wave-digs-into-western-great-basin-bringing-a-few-inches-of-snow-over-the-upper-elevations-of-the-central-sierra-between-today-and-the-re/) - 8:30am Saturday.... Models have come around to the thinking of the ECMWF (European model) that the system will take a more westerly trek with the upper jet off shore and allowing the Front Rt exit region to do its magic by providing lift and vorticity over and near the coastal waters of the far eastern pacific. This bodes
- [Fair Warm Weather to Continue in the High Country for Another Week then Colder unsettled Weather a good bet by Early Next Week.....Although No Major Storms on the Horizon.....It will be cold enough to begin Making Snow by Next Monday](https://mammothweather.com/2013/10/22/fair-warm-weather-top-continue-in-the-high-coubntry-for-another-week-then-colder-unsettleled-weather-a-good-bet-by-early-next-week-although-no-major-storms-on-the-horizon-it-will-be-cold-enoug/) - Wednesday AM Update: Concerning the cold short wave digging into the intermountain west next Monday/Tuesday.... The 12z GFS has it again and so odds are increasing that at least some snow showers are possible the first part of next week. The ECMWF and GFS have reversed roles with the GFS digging the upper trof furthest west now. It appears
- [Postive Phase PNA Pattern Likely to Persist into Months End with Cold East and Warm Dry West Although Cut Off Low May Bring Some Showers By The End of Next Week....](https://mammothweather.com/2013/10/17/postive-phase-pna-pattern-likely-to-persist-into-months-end-with-cold-east-and-warm-dry-west-although-cut-off-low-may-bring-some-showers-by-the-end-of-next-week/) - Thursday AM: Although not a strong +PNA set up...it is positive phased nevertheless. The blocking pattern off shore will move inland early next week leading to warmer temperatures over the upper elevation's with pretty much calm winds. High temps this weekend will be 55 to 60 at 8000 feet and by Tuesday or Wednesday could
- [Chilly inside slider headed for Mammoth Sunday AM with a chance of snowshowers in the morning. Colder Sunday...then milder Monday into Midweek......Western Pacific Typhoon WIPHA to set Stage for Change in WX pattern in the Long Range.....](https://mammothweather.com/2013/10/12/chilly-inside-slider-headed-for-mammoth-sunday-am-with-a-chance-of-snowshowers-in-the-morning-colder-sunday-then-milder-monday-into-midweek-western-pacific-typhoon-wipha-to-set-stage-for-chang/) - The weather of the next few days will be cooler then Friday with a chance of some light snow showers Sunday.... Highs will cool to the mid to upper 40s at 8000 feet with lows in the low 20s Monday AM. More importantly a couple of typhoons in the Western pacific are worth keeping an
- [Brief Warm Up to be Followed by Cooler Temps Sunday....Followed by Warmer Temps Monday Through Thursday.....Typical October WX](https://mammothweather.com/2013/10/11/brief-warm-up-to-be-followed-by-cooler-temps-sunday-followed-by-warmer-temps-monday-through-thursday-typical-october-wx/) - Wednesday's storm was not actually a bust....but Dug much further south then earlier predicated. As a result, the Southern Sierra did the best precip wise with amounts close to a foot in some upper elevation areas. Aspendale received 8 to 9 inches! Over all, Mammoth got 1 to 3 inches which was at the low end of the forecast. Lots of
- [Cooling Trend in play as Chilly Upper Level Low over the Pacific Northwest Decends South into California Early Wednesday Morning......Light Snowfall Expected to Begin Late Wednesday AM for Mammoth Lakes.....](https://mammothweather.com/2013/10/08/cooling-trend-in-play-as-chilly-upper-level-low-over-the-pacific-northwest-decends-south-into-central-california-tonight-light-snowfall-expected-to-begin-late-wednesday-am-for-mammoth-lakes/) - QPF 6:00pm Update: No Change.... 1 to 3 in town and 3 to 6 over the crest Wednesday morning through Thursday morning..... No Surprises this morning. This mornings 12z Tuesday WRF has the path of the upper low at 500mb tracking over the western slopes of the Central Sierra by early (21z) PM Wednesday. The Upper low at 700MB at the
- [Beautiful Warm Weekend Inplay with a Cold Westside Slider on the Way........Light Snowfall expected for Mammoth Lakes Wednesday into Thursday......](https://mammothweather.com/2013/10/05/beautiful-warm-weekend-inplay-with-a-cold-west-slider-on-the-way-light-snowfall-expected-for-mammoth-lakes-wednesday-into-thursday/) - Tuesday Am Update: QPF has settled in at between .4 and .5 . The snowfall forecast is 1 to 3 inches in town and 3 to 5 inches in the upper elevations..... The track of the upper center is pretty much right over the top of us now and as of late....which is an adjusted slight jog
- [Chilly Today Warm Tamale.....Upper Ridge with Warm temperatures over the Weekend to Follow Shot of Cold Air Currently Over the High Country.......Cold Inside Slider Looming for Next Week is beginning to dig further west in subsequent model runs......Will have to Keep a Weary eye on this little Bugger!](https://mammothweather.com/2013/10/04/chilly-today-warm-tamale-upper-ridge-with-warm-temperatures-over-the-weekend-to-follow-shot-of-cold-air-currently-over-the-high-country-cold-inside-slider-looming-for-next-week/) - There was some light frost this morning in the Mammoth Slopes area at elevations near 8000 ft and temperatures dropped to the low 20s here near the Village. As mentioned a few days ago, the Aspens are coming on strong now. Color in the high country at the 8000 foot level will peak in the next 6 to 10
- [Outstanding Fall Weather today.....Aspens Coming on Strong Now with Lots of Color to Come......Warmer then normal today with highs well into the Upper 60s....Then get ready for a Big Cool Down Thursday into Friday......Weather to stay Dry.....](https://mammothweather.com/2013/10/01/outstanding-fall-weather-today-aspens-coming-on-strong-now-with-lots-of-color-to-come-warmer-then-normal-today-with-highs-well-into-the-upper-60s-then-get-ready-for-a-big-cool-down-thursda/) - Wednesday AM Update: Breezes will pick up today and temperatures will be slightly cooler... low 60s..... Moderate Winds will increase later tonight into Thursday With high temps in Mammoth cooling some 10 to 15 degrees tomorrow over today. . It will be warmer over the weekend.....the extended shows another trof early next week so the
- [Flat Ridge to Build over the high country for the next 6 to 10 days......Seasonal temperatures and dry weather expected...Further outlook looks dry....Well into October.....El Nino beat grows louder today.......](https://mammothweather.com/2013/09/27/flat-ridge-to-build-over-the-high-country-for-the-next-6-to-10-days-seasonal-temperatures-and-dry-weather-expected-further-outlook-looks-dry-well-into-october/) - Sunday Am update: No changes this morning......Short, medium and long range all look dry.... Temperatures look seasonal with highs mostly in the low to mid 60s and lows in the 30s and 40s. Today weather is being effected by the big storm in the pacific northwest. The front Rt exit region of the upper jet is
- [Welcome to the first full day of fall in the Eastern Sierra.....Jack Frost Returns!!!! Temperatures seasonal today.......However, upper trof will push cold front through Mammoth Tuesday evening followed by snow showers Wednesday into Thursday......ALL GLOBAL MODELS IN SYNC FOR BEAUTIFUL FALL FOLLOWING WEEKEND WITH SEASONAL TEMPS.....](https://mammothweather.com/2013/09/23/welcome-to-the-first-full-day-of-fall-in-the-eastern-sierra-jack-frost-returns-temperatures-seasonal-today-however-upper-trof-will-push-cold-front-through-mammoth-tuesday-evening-follow/) - Slower improvement today then yesterday run....Some upslope this evening noted as well from the 12z NAM surface progs to 700mb. Few flurries possible if there is any moisture left. Warming trend with Sunny skies Friday into early next week. 500-1000mb thicknesses were south of 546DM this morning so temps may be a little slow to recover. Expect highs in the very
- [Upper Trof to push thorugh last day of Summer bringing the Mammoth Crest its 1st Dusting.........First Fall Trough Wednesday may be inslide slider with colder air to follow.....Gusty north winds for the Bishop Area.....](https://mammothweather.com/2013/09/19/upper-trof-to-push-thorugh-last-day-of-summer-first-fall-trough-wednesday-may-be-inslide-slider-with-colder-air-to-follow-gusty-north-winds-for-the-bishop-area/) - Saturday PM Update: Rainfall amounts exceeded expectations with .61 at 8200 feet. There is also a good dusting here as well. The Dweebs believe that there is at least 3 to 6 inches of fresh snowfall over Mammoth Mt. The storm is over now with just a few isolated lingering showers.... It will get cold
- [1st Chilly Below Freezing Temps this morning in the High Country.....the next Trof is Colder...but not likely to bring Snowfall that is measurable this weekend....Another Chilly trof will swing through next Wednesday.....Say goodby to Summer this Saturday......](https://mammothweather.com/2013/09/18/1st-chilly-below-freezing-temps-this-morning-in-the-high-country-the-next-trof-is-colder-but-not-likely-to-bring-snowfall-that-is-measurable-this-weekend-another-chilly-trof-will-swing-throug/) - Mammoth Lakes had it first low 30s temp readings this morning since June. The next Trof will bring additional cooling...possibly down into the upper 20s by Sunday AM. There is another slightly deeper Trof expected to flush through next Wednesday.....A full week away. Precipitation: Both ECMWF and the GFS have reached a compromise in the depth of the weekend
- [Typhoon Man Yi Constructively Phases with Westerlies.....Amplifacation Down Stream this week Increases the odds of stronger Fall Trof Effecting Central and Northern California Next Weekend](https://mammothweather.com/2013/09/16/typhoon-man-yi-contructivly-phases-with-westerlies-amplifacation-down-stream-this-week-increases-odds-of-stronger-fall-trof-effecting-central-and-northern-california/) - Monday afternoon update: ECMWF is stronger with upper Trof for Friday night and Saturday....GFS is beginning to trend deeper.......light Snow in Mammoth Lakes???? After today....say good-by to the Summer 70's as a series of Gulf of AK trofs migrate through the west coast bringing shots of cooling along with gusty winds. Although currently active.....the AZ Monsoon will
- [Upper low over Nevada to back wash some showers and thunder to the Eastern Sierra....it will be warm and dry this weekend.....1st in series of Fall Trofs to make there way to the Pacific NW by mid week.....Cooler possibly windy weather 2nd half of next week for Mammoth Lakes......](https://mammothweather.com/2013/09/11/upper-low-over-nevada-to-back-wash-some-showers-and-thunder-to-the-eastern-sierra-it-will-be-warm-and-dry-this-weekend-1st-in-series-of-fall-trofs-to-make-there-way-to-the-pacific-nw-by-mid-wee/) - Saturday PM: LI index is -.5 now with .7 PWAT Convergence along sierra crest is evident with Cu popping. Some chance of some showers is in order today. Fair and Breezy Sunday Saturday AM update: Only change this morning is a little extra residual moisture around and plenty of sunshine. Looking at the
- [Some Thunder in the forecast the next few days....Then warmer for the weekend.....Next cool down comes later next week with fall-like Trofs effecting Mainly the Pac NW.......Cooler weather 2nd half of next week.](https://mammothweather.com/2013/09/10/some-thunder-in-the-forecast-the-next-few-days-then-warmer-for-the-weekend-next-cool-down-comes-later-next-week-with-fall-like-trof-effecting-mainly-the-pac-nw/) - Wednesday AM: Upper low over Nevada now with counter-clockwise flow at 700mb back washing some moisture into the Eastern Sierra over the next few days. Yesterday there looked to be a storm over the Yosemite valley. For those that want an update on the Rim fire, here is a link to a good blog that
- [Clean Air Returns to Mammoth Lakes......At Least for a while....Still some isolated showers possible this week.........Overall, very nice weather here.....Some Aspens turning yellow gives a hint of Fall......](https://mammothweather.com/2013/09/02/clean-air-returns-to-mammoth-lakes-at-least-for-a-while-still-some-isolated-showers-possible-this-week-overall-very-nice-weather-here-some-aspens-turning-yellow-gives-a-hint-of-fa/) - Saturday 11:30am Computer Issues the past week... Will update soon.... Dr Howard and the Dweebs.......................:-) Labor Day Update 5:30PM With the expected wind increase yesterday.....clearing came to the skies of Old Woolly as expected. Afternoon clouds and a few light showers dotted the skies mainly to our east. Eastern California continues to be inbetween a Trof in the
- [Dry weather expected again Today and Saturday with moisture on the increase Sunday into Monday. Some stronger breezes Sunday PM and Monday.....The chance of measurable precipitation increases to 30% by Sunday into Monday......Drier air will move back into our area by Mid week with just a Slight Chance of TSRWs....](https://mammothweather.com/2013/08/30/dry-weather-expected-again-today-and-saturday-with-moisture-on-the-increase-sunday-into-monday-some-stronger-breezes-sunday-pm-and-monday-the-chance-of-measurable-precipitation-increases-to-30-by/) - Saturday Evening Update: PM 10 Count hit 175 PPM at 6:00pm Saturday. (Unhealthy) Make sure you keep windows closed and keep indoors. Latest on Rim Fire: Rim Fire Fact Sheet 31 August 2013 Day 15 Acreage: 219,277 Largest fire in the United States to date in 2013· No. 1-ranked on national firefighting priority list Fifth
- [Mid Level Southerly Flow Allowing Smoke to continue moving NNE away from Southern Mono County....Some increase in Moisture today may kick off a few convective TSRWs today and Wednesday but no real forcing in the mix.....Holiday Weekend will be nice first half then Breezy Sunday into Monday....](https://mammothweather.com/2013/08/27/mid-level-southerly-flow-allowing-smoke-to-continue-moving-nne-away-from-southern-mono-county-some-increase-in-moisture-may-kick-off-a-few-convestive-tsrws-today-and-wednesday-but-no-big-deal-h/) - Thursday AM Update in Rim Fire: Current Situation Total Personnel 4,840 Size 192,737 acres Percent Contained 30% Estimated Containment Date Friday September 20th, 2013 approx. 12:00 AM Tuesday: Rim Fire is 20% contained....179,481 acres burned as of this morning.....Future fire growth potential is extreme. A slight westward expansion of the continental upper high
- [Mammoth Clear and Virtually Smokless.....Upper Trough off Shore will give way to a little southerly flow increasing a chance of some Showers or Thunder for Tomarrow.....Very active pattern continues over Southern California Deserts as remains of TS Ivo interact with Rt Rear Entry of Upper Jet......](https://mammothweather.com/2013/08/26/mammoth-clear-and-virtually-smokless-upper-trough-off-shore-will-give-way-to-a-little-southerly-flow-increasing-a-chance-of-some-showers-or-thunder-for-tomarrow-very-active-pattern-continues-o/) - Quick Update Tuesday: Rim Fire is 20% contained....179,481 acres burned as of this morning.....Future fire growth potential is extreme. A slight westward expansion of the continental upper high has spread some warmth in the mid levels and has created stronger inversions for the next couple of days. This means that areas down stream from the fire
- [Thunderstorms to Redevelop Again today and Wednesday as Upper Cut Off Low Remain West of Santa Barbara Today....Upper Center to begin lifting toward the Bay Area Wednesday.....Drier Air to begin mixing in Wednesday Night.....Fair...Dry Warm Weather expected Thursday Through the Weekend......](https://mammothweather.com/2013/08/20/thundstorms-to-redevelop-again-today-and-wednesday-as-upper-cut-off-low-remain-west-of-sana-barbara-today-upper-center-to-begin-lifting-toward-the-bay-area-wednesday-drier-air-to-begin-mixing-i/) - Wednesday AM Update: Few showers dampened the ground at Snowcreek this AM. More on the way. Wave loop showed Upper cut off just a tad south of Monterrey Bay. I love the way cut offs wobble! Amazing! It was evident that the upper flow has become more south/North orientated as compared to SE/NW which is more of
- [Temperatures to remain normal to above the next week with chances of some summer type rainfall increasing Sunday then into Tuesday......CFS Today has El Nino Beat Picking Up Tempo for California Winter of 2014......](https://mammothweather.com/2013/08/16/temperatures-to-remain-normal-to-above-the-next-week-with-chances-of-some-summer-type-rainfall-increasing-sunday-then-into-tuesday-cfs-today-has-el-nino-beat-picking-up-tempo-for-california-winte/) - Sunday Am Update: Offshore weak trof is now a cut-off low. It was located a little SW of Monterrey Bay at Sunrise. It will spin up a bit drift slightly south over the next 36 hours and so its effect upon the Sierra Tomorrow over today will be greater. PWAT is not impressive today. About .65 over
- [Seasonal Temperatures to Rule the High Country the Next 6 days then warmer then normal next week....Expect a Stronger Zephyr along with a few Isolated Thunderstorms Saturday......Perfect Summer Weather to Continue...........](https://mammothweather.com/2013/08/13/seasonal-temperatures-to-rule-the-high-country-the-next-6-days-then-warmer-then-normal-next-week-expect-a-stronger-zephyr-along-with-a-few-isolated-thunderstorms-saturday-perfect-summer-weathe/) - Although the Westerly's have picked up strength over the Northern Latts....the weather over Mammoth will trend slowly warmer the next 6 to 10 days. A short wave moving briefly through Ca may kick up some extra wind Saturday along with some unstable air for a few isolated TSRWs and bring a few degrees of cooling. (Saturday Only) Climo suggests that the temps over Mammoth should be slowly
- [Warming Trend this weekend along with Lighter Breezes by Sunday....Dry Weather Expected through the Middle of Next Week....Perseids Flying High Sunday Night...Then the CFS 1st peak of the Upcoming Winter...](https://mammothweather.com/2013/08/09/warming-trend-this-weekend-along-with-warmer-temps-and-lighter-breezes-by-sunday-dry-weather-expected-through-the-middle-of-next-week-perseids-flying-high-sunday-night-then-the-cfs-1st-peak-of/) - Friday AM: Another 2 breezy days ahead then a weaker Zephyr and Warmer Temps. Mammoth should enjoy another 5 to 7 days without precipitation. Aspen Fire is 85% contained.....Next week looking excellent for back county travel......Highs returning to the mid to upper 70s by Tuesday-Wednesday. Lows now in the upper 30s and low 40s. Don't
- [Troughing off shore and a developing southerly flow will highlight our weather with a few thunderstorms this week along with gusty winds at times....Expect Temps to be Near or Slightly Below Normal](https://mammothweather.com/2013/08/05/troughing-off-shore-and-a-developing-southerly-flow-will-highlight-our-weather-with-a-few-thunderstorms-this-week-along-with-gusty-winds-at-times-expect-temps-to-be-near-or-slightly-below-normal/) - Thursday AM Update: No surprises this morning. A dry southwest flow associated with an upper low off the Northern CA coast will continue here in Southern Mono County. There is some moisture moving north along the NV/CA border but feel that Mammoth will not have much chance of thunderstorms unlike more northern and eastern portions for the
- [Quite Weather Pattern To Continue this Next Next week with a few Isolated Thunderstorms possible..... Wednesday through Friday........](https://mammothweather.com/2013/08/03/quite-weather-pattern-to-continue-this-next-next-week-with-a-few-isolated-thunderstorms-possible-wednesday-through-friday/) - Aspen Fire Sunday Evening Update" Current Situation Total Personnel 1,828 Size 20,252 acres Percent Contained 70% Estimated Containment Date Saturday August 10th, 2013 approx. 12:00 AM Fuels Involved Timber with mixed chaparral Fire Behavior Fire continued to be active throughout the north and east sides of the fire. Temperature is increasing and humidity decreasing.
- [Dry Conditions Return to the Eastern Sierra with near Seasonal Temperatures along with Afternoon and Evening Zypher winds......It will be breezy Wednesday and Thursday...Smoke from Aspen Fire to persist the next few days.....](https://mammothweather.com/2013/07/29/dry-conditions-return-to-the-eastern-sierra-with-near-seasonal-temperatures-along-with-afternoon-and-evening-zypher-winds-it-will-be-breezy-wednesday-and-thursday-smoke-from-aspen-fire-to-persi/) - Aspen Fire Incident Update: http://inciweb.org/incident/article/3552/19548/ Tuesday AM Update: Southwest flow will slowly increase today with the drying trend that began Sunday continuing today.....tomorrow and on into Thursday. High temperatures will range just below seasonal norms with breezier weather expected Wednesday and especially Thursday. By Wednesday, the breezes may actually help to disperse the smoky conditions earlier in the day and suppress
- [Drier air to invade Eastern California the next 3 to 5 days with Zephyr Winds on the Increase Monday.....Daytime Highs will Increase again while Nighttime lows fall.... ](https://mammothweather.com/2013/07/28/drier-air-to-invade-eastern-california-then-next-3-to-5-days-with-zephyr-winds-on-the-increase-monday-daytime-highs-will-increase-again-while-night-time-lows-will-fall/) - The best rain/hail shower break out of the year occurred Saturday afternoon in Mammoth as a significant deformation area of surface convergence developed over Southern Mono County and along the Eastern Slopes of the South Central Sierra. Forty Three hundreds fell at Mammothweather.com and pea sized hail along with some minor street flooding occurred Saturday. The
- [Thunderstorm Chances on the Increase Again the Next Few Days as Mid Level Cap Weakens....Southerly flow to Add Moisture and Dynamics through Friday Evening....Dry weather with Zephyr winds to return next week....](https://mammothweather.com/2013/07/25/thunderstorm-chances-on-the-increase-again-the-next-few-days-as-mid-level-cap-weakens-southerly-flow-to-add-moisture-and-dynamics-through-friday-evening-dry-weather-with-zyphyer-winds-to-return/) - Friday AM 8:14 AM Thunderstorm Threat (High)......Outlook favorable for thunderstorms through Saturday then more isolated Sunday. Dry Monday through Thursday. 8000 ft Daytime highs mid 70s, lows upper 40 and low 50s Update on the Aspen Fire WSW of Mammoth: 4500 Acres: The Aspen Fire was discovered on Tuesday, July 23 burning on the Sierra
- [Upper High over Nevada to Weaken Today Allowing Moist Upper Flow to finally move North through the Central Sierra.....Showers and Thunderstorms a good bet the next few days......](https://mammothweather.com/2013/07/22/upper-high-over-nevada-to-weaken-today-allowing-moist-upper-flow-to-finally-move-north-through-the-central-sierra-showers-and-thunderstorms-a-good-bet-the-next-few-days/) - Tuesday AM Update: NWS Hoists Flash Flood Watch for both Inyo and Mono County's: Campers, Hikers and Fisher folks keep your eyes on the weather today. Be aware of your surroundings and stay away from areas prone to flash flooding. IE Canyons, Arroyos, creeks and stream's. If heavy rain is observed upstream get to higher
- [Near Record Highs Expected the Next Few Days before Airmass Modifacation Increases Moisture and Rain Possibilities Later in the Weekend and into early next week...Drier More Comfortable Weather to Return by Midweek Next Week....](https://mammothweather.com/2013/07/18/near-record-high-expected-the-next-few-days-before-airmass-modifacation-increases-moisture-and-rain-possibilities-later-in-the-weekend-and-into-early-next-week-drier-more-comfortable-weather-to-retu/) - The high temperature reached 83 in Mammoth Wednesday as heights increased once again over the far west leading one to believe that that the Summer of 2013 is looking to be quite the warmer then normal Summer. With that said, Thunderstorms so far have not been that all impressive right here in Mammoth thus far. That may
- [Channeled Flow Aloft will make for a Dry Breezy Day today with little change in temperature.....SE flow to increase moisture and possibly Dynamics into the Sierra late this Weekend into Early Next Week.....](https://mammothweather.com/2013/07/16/channeled-flow-aloft-will-make-for-a-dry-breezy-day-today-with-little-change-in-temperature-se-flow-to-increase-moisture-and-possibly-dynamics-into-the-sierra-late-this-weekend-into-early-next-wee/) - This mornings analysis showed a Trof of low pressure just off the Northern Ca Coast and higher pressure aloft to the east having the effect of channeling a Dry SSW flow aloft into the Sierra. This will make for a breezy afternoon and evening in the Mammoth area as well as the Owens Valley. Temps will be
- [Dry SW Flow will Insure Fair Weather with seasonal temps this weekend....Then Warmer Weather Next Week....](https://mammothweather.com/2013/07/13/dry-sw-flow-will-insure-fair-weather-with-season-temps-this-weekend-then-warmer-weather-next-week/) - Beautiful Weather....Just spectacular! Those are the words that have been common around town the past several days.... The Mono County Zephyr has lightened up and Stable Conditions brought on by the SW flow has put the Kibosh on any thunderstorm threat for a while. Enjoy daytime highs in the mid to upper 70s this weekend then
- [Breezy..Dry SW Flow to Continue Today and Wednesday....Mid Level Moisture on the Way for Thursday with a chance of some light rainfall.....At the Moment a Dry Weekend is Forcasted.....AZ Monsoon Shifts into High Gear with additional chances of rainfall later next week....](https://mammothweather.com/2013/07/09/breezy-dry-sw-flow-to-continue-today-and-wednesday-mid-level-moisture-on-the-way-for-thursday-with-a-chance-of-some-light-rainfall-at-the-moment-a-dry-weekend-is-forcasted-az-moonsoon-shif/) - Thursday AM: Latest modeling, Radar and Sat Maps show main action today over SE Ca with small meso-scale convective cluster near Needles, CA within PWAT of 2 inches. Not a great day to be water skiing in Parker past FOX's. PWAT over Bishop about an inch and over Mammoth .75 Although Lot's of Moisture today in the
- [Its Sierra Weather at its Finest.....The Up-Coming Week will have a few Extra Warm Days Monday and Tuesday...Then Cooler Breezier Days Wednesday through Friday.....Next Heat Wave Brewing beginning about the 15th.....](https://mammothweather.com/2013/07/06/its-sierra-weather-at-its-finest-the-up-coming-week-will-have-a-few-extra-warm-days-monday-and-tuesday-then-cooler-breezier-days-wednesday-through-friday-next-heat-wave-brewing-beginning-abo/) - The Heat Wave is broken....now a typical weather pattern develops over the far west with highs each day in Mammoth upper 70s to low 80s dipping down to the low 50s during the hours prior to Sunrise. The Mono Zephyr (west wind) will insure a dry pattern in Mammoth the next 7 days with isolated thunderstorms in and
- [First its the heat...then its the humidity!...Bishops Heat has Peaked shattering old record of 105 Monday with 109....Now add humidity....Temperatures to slowly drift downward beginning today......](https://mammothweather.com/2013/07/02/first-its-the-heat-then-its-the-humidity-bishops-heat-has-peaked-shattering-old-record-of-105-monday-with-109-now-add-humidity-temperatures-to-slowly-drift-downward-beginning-today/) - Dew points were up this morning with mid 40s widespread. Lots of sunshine this morning will guarantee an active TSRW set up for the high county with POPs north of 40% this afternoon and evening for the Mammoth Area. Mammoth had a high of 88 yesterday at the 7700 foot level. Latest IR shows lots of
- [Record Heat for Eastern California Through Tuesday.....Heat Wave may now linger longer next week but not as hot second half....Airmass Modifacation Type High Country Thunderstorm break-out likely Tuesday through Thursday.....](https://mammothweather.com/2013/06/29/record-heat-for-eastern-california-through-tuesday-heat-wave-may-now-linger-longer-next-week-but-not-as-hot-second-half-airmass-modifacation-type-high-country-thunderstorm-break-out-likely-tues/) - Quick Update Sunday AM: Temps hit 89 in Mammoth Saturday...a record... Today is the day to hit 90 degrees! The old records was 83 set back in 2002. Thunderstorms will increase a bit today over the sierra but may be less Monday. Thunderstorms will increase Tuesday into Thursday... This current heat wave will likely be
- [Heat is on across Eastern California and Nevada with Record High Temperatures expected this weekend into early next week...Heat Wave to begin breaking down by Mid Week](https://mammothweather.com/2013/06/27/heat-is-on-across-eastern-california-and-nevada-with-record-high-temperatures-expected-this-weekend-into-early-next-week-heat-wave-to-begin-breaking-down-by-mid-week/) - The weather charts this morning had no problem pumping 500mb heights over Mammoth to 594DM by 1600UTC. This is just the beginning as heights will Climb to the high 590s and 500-1000mb thicknesses into the mid to upper 580s by early next week. Any high temperatures records in Mammoth will be dependent upon how rapid air-mass modification occurs over
- [Moisture Fetch now lifting north with Some Sunshine expected today....Warming trend to kick into high gear Wednesday with upper 80s expected by Sunday in Mammoth...Heat wave may last  7 to 10 days.....High based thunderstorms a good possibility next week....](https://mammothweather.com/2013/06/25/moisture-fetch-now-lifting-north-with-some-sunshine-expected-today-warming-trend-toi-kick-into-high-gear-wednesday-with-upper-80s-expected-by-sunday-in-mammoth-heat-wave-may-last-7-to-10-days/) - Tuesday AM: Moisture band still effecting the high country of the Central Sierra. Light rain fell Monday with amounts .12 to .15 recorded from RAWS sites around town. Checking SFO Radar, most of the shower activity is Sonora Pass north at the moment. Although there are still some showers to the west of Mammoth and out over the Valley.
- [A few cool...breezy....cloudy days with a few showers, then the heat is on later this week!](https://mammothweather.com/2013/06/24/a-few-cool-breezy-cloudy-days-with-a-few-showers-then-the-heat-is-on-later-this-week/) - ______________________________________________________________________________________________________________________________________________________________ Monday AM UPDATE: Just a quick update.....The band of moisture currently headed into the Sierra still has the potential to bring some light rain or sprinkles today. The Dweebs are not expecting a lot but enough to possibly dampen the ground. The most notable change to the forecast is that temperatures will be quite a bit cooler
- [Changable Weather Pattern over the Next Week with some light rain possible Monday/Night then very warm second half of Next Week](https://mammothweather.com/2013/06/21/changable-weather-pattern-the-next-week-with-some-light-rain-possible-sunday-and-monday-then-very-warm-the-second-half-of-next-week/) - Sunday AM Update: Increasing clouds are expected today with gusty SW breezes this afternoon and evening to 30 MPH. The first of 3 surges of moisture is now into Northern California. This will be mostly high clouds for our local high country. No precipitation is expected in Mammoth today. Expect highs a little cooler today
- [Breezy to Windy this Afternoon as Upper Trof Pushes East Through the Pacific NW....Warmer more Tranqual WX this Weekend..Then signifacant warm up next week.....](https://mammothweather.com/2013/06/18/breezy-to-windy-this-afternoon-as-upper-trof-pushes-east-through-the-pacific-nw-warmer-more-tranqual-weekend-then-signifacant-warm-up-next-week/) - Winds were ramping up over the upper elevations this morning as the latest upper trof moves through the pacific NW. Blocking over Alaska has had the effect of suppressing the upper jet south of its normal position, over Northern California. Thus it will be windy this afternoon and evening and cooler Wednesday. In that Mammoth is
- [New WX pattern ushers in cooler air and seasonal temps....Breezy to Windy Weather will be on....More often then not.....Dry Weather now likely the next 6 to 10 days unless another cut off low forms off shore.......Last week of June Hot!!](https://mammothweather.com/2013/06/11/new-wx-pattern-ushers-in-cooler-air-and-seasonal-temps-breezy-to-windy-weather-will-be-on-more-often-then-not-dry-weather-now-likely-the-next-6-to-10-days-unless-another-cut-off-low-forms-of/) - Saturday Update: As expected...very light breezes occurred Friday. Today Saturday, and into Sunday should experience a slow increase in mainly mid afternoon and early evening breezes. Temps near the 8000 foot level will remain unchanged for the next 3 days with highs in the upper 60s to low 70s. Today's afternoon winds will average in the 10 to 15 MPH range
- [Showers and Thunder today and Thursday with a Cap to inhibit development Friday and Saturday with Hot Hot Temps!.....Thunderstorms to return Sunday as upper cut off ejects through Ca......Putting the AO/California Teleconnection to RIP......](https://mammothweather.com/2013/06/05/showers-and-thunder-today-and-thursday-with-a-cap-to-inhibit-development-friday-and-saturday-with-hot-hot-temps-thunderstorms-to-return-sunday-as-upper-cut-off-ejects-through-ca-putting-the/) - Saturday Am update: This will be Brief: The high temp in bishop Saturday was 103......Tying the old record of 103 set back in 1955. Todays temp forecast is 105 that would break the all time record of 104 set back in 1955. For Mammoth... Highs will be in the mid 80s Isolated TSRWS
- [More Showers and Isolated Thunder in the Forecast the next few days.....Focus has shifted West of the Crest.......Then Very Hot weekend shaping up with high temperature records in jeopardy.....Windy, Cooler weather to return by Midweek W/Cooling trend into following weekend.....](https://mammothweather.com/2013/06/04/more-showers-and-isolated-thunder-in-the-forecast-the-next-few-days-focus-has-shifted-west-of-the-crest-then-very-hot-weekend-shaping-up-with-high-temperature-records-in-jeopardy-windy/) - Wednesday AM Update: Once again showers and isolated thunderstorms occurred in Mammoth. Although Thunder was not heard, the Dweebs picked up .02 in the rain tip bucket. No change is expected in the forecast today. The 500MB upper low located about 700 miles west of TJ, MX will continue to provide an upper divergence lower level
- [Toasty WX Forecast is Reiterated this week with Isolated then Widley Scattered Thunderstorms...Late Afternoons and early evenings through Thursday....."Heat to Peak" next weekend then cool down second half of the following week](https://mammothweather.com/2013/06/03/toasty-wx-forecast-is-reiterated-this-week-with-isolated-then-widley-scattered-thunderstorms-afternoons-and-early-evenings-through-thursday-heat-to-peak-next-weekend-then-cool-down-second-half/) - It was already 80 Degrees in Bishop at 9:00am today while Mammoth bumped up over the 60. This week the weather will feel early July like, then mid July like as high temps remain 10 to 15 degrees above normal then as warm as 20 degrees above normal by next Sunday. The ECMWF "3 to 5 then
- [Late Spring Heat Wave to send High Temps up into the upper 70s in Mammoth.....Then cut off upper low may allow some Summer like Showers to develop toward Tuesday then into Thursday....A bit of cooling is expect by the following weekend and into the following week](https://mammothweather.com/2013/05/31/late-spring-heat-wave-to-send-high-temps-up-into-the-upper-70s-in-mammoth-then-cut-off-upper-low-may-allow-some-summer-like-showers-to-develop-toward-tuesday-then-into-thursday-a-bit-of-cooling/) - Yes.....Its going to be toasty this weekend! Highs in the Mid to Upper 70s Saturday and Sunday in Mammoth and Mid 90s in the High Deserts. The ECMWF tells the screaming message that the last chilly system has moved though and although the GFS has some cooling for the following week after the 9th, the cooling will
- [More Light Rain in Mammoth This Morning.....And a beautiful Double Rainbow at Sunrise......Get ready for some Toasty Weather this weekend then some Summer Like Convection by Mid Week Next Week](https://mammothweather.com/2013/05/29/more-light-rain-in-mammoth-this-morning-and-a-beautiful-double-rainbow-at-sunrise-get-ready-for-some-toasty-weather-this-weekend-then-some-summer-like-convection-by-mid-week-next-week/) - As of 9:30am the moisture band was all but gone leaving partly cloudy skies. The snow level was mostly above 11,000 feet. That should be the end of it.... The upper jet lifts north tonight ensuring a warm dry weekend. Thereafter, about Sunday night another short wave will move into the pacific northwest with the
- [Showers To End This Morning with Partly Cloudy Skies today and Wednesday.....Improving and Warmer Weather Expected Thursday into the Weekend.......MJO shifting into Phase 3 May bring a return to cooler and possibly wet weather Week 2.....](https://mammothweather.com/2013/05/28/showers-to-end-this-morning-with-partly-cloudy-skies-today-and-wednesday-improving-and-warmer-weather-expected-thursday-into-the-weekend-mjo-shifting-into-phase-3-may-bring-a-return-to-coole/) - Nice little system freshens up the air and dampens the forests and wildflowers..... Skies were becoming partly cloudy this morning as the remaining deeper moisture moved off to the SE. Total precipitation was .21 hundreds for the system bringing the monthly total of .44 inches of water for the month of May, here at Mammothweather.com. A
- [Memorial Holiday Weekend Breezy with near seasonal temps...Then stronger upper trof to descend rapidly toward the Sierra Monday Afternoon into Tuesday....](https://mammothweather.com/2013/05/24/memorial-holiday-weekend-breezy-with-near-seasonal-temps-then-stronger-upper-trof-to-decend-rapidly-toward-the-sierra-monday-afternoon-into-tuesday/) - Focusing on the shorter term...the holiday weekend will be breezy with highs primarily in the low 60s at resort levels. Gradient driven afternoon and evening breezes will kick up each afternoon with gusts in the 30-35MPH range. Night time lows will be in the 30s. There will be a good shot of precipitation that comes into
- [Last Gasp of the Winter Trofs at Hand as CFS shows June Weather to bring on Summer Heat Quickly!!!](https://mammothweather.com/2013/05/21/last-gasp-of-the-winter-trofs-at-hand-as-cfs-shows-june-weather-to-bring-on-summer-heat-quickly/) - Wednesday AM Update: An upper trof over Oregon this morning is providing the gradient for WSW winds to continue. Upper Jet still favorable for wind gusts to 70MPH over the upper elevations and gusts to 40MPH in town. It will be a cooler day today with highs in the mid 50s and nighttime low will
- [Major Change in Hemisipheric Pattern to effect Eastern California with Cooler more Unsettled Weather more on than off through the end of May......However, this weekend looks fair and mild, then warm the beginning of next week....](https://mammothweather.com/2013/05/15/major-change-in-hemisipheric-pattern-to-effect-eastern-california-with-cooler-weather-more-unsettleled-weather-more-on-than-off-through-the-end-of-may-however-this-weekend-looks-fair-and-mild-th/) - Models are trending a bit slower and stronger with the Thursday Trof, now lingering it into Friday. Although yesterdays guidance showed about 8 to 10 degrees of cooling, it now looks more like between 10 to 15 degrees total. With the deeper scenario, heights will be lower and thus along with the stronger breezes Thursday, snow showers
- [Temperatures to trend slowly toward more seasonal norms the next week to 10 days as a series of weak trofs effect the central west coast ](https://mammothweather.com/2013/05/13/temperatures-to-trend-slowly-toward-more-seasonal-norms-the-next-week-to-10-days-as-a-series-of-weak-trofs-effect-the-central-west-coast/) - Tuesday Morning Update: Latest guidance points to a Vort max that has recently moved on shore just south of Monterrey Bay at 15Z. You can see the dark area of that Vort center plainly on shore in the water vapor loop. Although the timing of the dynamic forcing will not be perfect as the dynamic lift
- [Mid Springtime Showers And Thunder still On for the High Country this Weekend with Showers, Thunder and even some snowfall Monday-Tuesday over Upper Elevations....Fair Weather Returning by....Or Just after Mid Week.......](https://mammothweather.com/2013/05/03/mid-springtime-showers-and-thunder-still-on-for-the-high-country-this-weekend-with-showers-thunder-and-even-some-snowfall-monday-tuesday-over-upper-elevations-fair-weather-returning-by-or-just/) - The GFS has done an excellent job so far in forecasting the coupling of a short wave now over the Northern Rockies that will ultimately diverge to the Rt and pick up the old cut-off low, now located at about 139W and just north of the Tropic of Cancer. All models have this scenario now over the
- [Warming Temps on the Way Thursday into Friday....Developing Closed Low to Bring First Widespread Spring Thunderstorm Outbreak as early as Sunday into Tuesday....Westerlies may Make a Run for the Coast by Mid Month.....](https://mammothweather.com/2013/05/01/warming-temps-on-the-way-thursday-into-friday-developing-closed-low-to-bring-first-widespread-spring-thunderstorm-outbreak-as-early-as-sunday-into-tuesday-westerlies-may-make-a-run-for-the-coast/) - The Dweebs are pretty excited about the prospects for some Spring Time Thunder and showers beginning Sunday, then into Tuesday. This mornings 12z GFS deterministic run has an upper cyclonic center developing off the Northern Ca coast as early as Sunday morning. As it slides SW...It couples with an older Cut Off, currently trapped underneath an upper high to the north. (REX BLOCK) The
- [Warm Sierra Weather to give way to some cooling mid week...Then a Quick Warm Up for the Weekend Expected.....Mid Spring Thunderstorm Pattern may develop early the following week.....](https://mammothweather.com/2013/04/29/warm-sierra-weather-to-give-way-to-some-cooling-mid-week-then-a-quick-warm-up-for-the-weekend-expected-mid-spring-thunderstorm-pattern-may-develop-early-the-following-week/) - Yes.....Temperature records were broken this past weekend and another day today of broken high temps are expected. However, Spring is a time of changing weather, and cooling is expected tomorrow. A short wave now coming through the pacific northwest will drag a cool front through Eastern Ca and bring about 10 degrees of cooling Tuesday into Wednesday.
- [Weather for the Fishing Opener will be Historic!.....With highs in the mid 70s on Crowley Lake and very light Breezes.....High Temperatures Records in Jeopardy this Weekend](https://mammothweather.com/2013/04/26/weather-for-the-fishing-opener-will-be-historic-with-highs-in-the-mid-70s-on-crowley-lake-and-very-light-breezes-high-temperatures-records-in-jeopardy-this-weekend/) - Sunday Morning Update: Clear...cool and calm conditions this morning with chilly early morning lows in the 30s. High temps will bump up to the low 70s in the Towns of Mammoth and June while at Lake Crowley Lake, 79 is the forecast high today Sunday, and 80 is the forecast high Monday. These are record highs for this time
- [Another Nice Week....Gusty NE Winds over the Crest Tuesday With 5 to 10 degrees of cooling.....Then Warming Trend Thursday into the Fishing Opener!](https://mammothweather.com/2013/04/22/another-nice-week-gusty-ne-winds-over-the-crest-tuesday-with-5-to-10-degrees-of-cooling-then-warming-trend-wednesday-into-the-fishing-opener/) - Temperature Forecast for Crowley Lake for the Fishing Opener: Saturday Low 30 High 73 Sunday Low 32 High 72 Very Light breezes during the afternoon out of the NNE Best Fishing Opener weather in Years..... Full Pink Moon Thursday Best bite in the late afternoon and evening at or near Full Moon The
- [Eastern Pacific Upper Ridge Now in Control.......Warming Trend through Sunday......Dry through next Wednesday with some afternoon Build-Ups Midweek.......](https://mammothweather.com/2013/04/18/upper-ridge-now-in-control-warming-trend-through-sunday-dry-through-next-wednesday-with-some-afternoon-build-ups-midweek/) - Quick Update Friday: Weak NW slider short wave to kick up a little wind "Over the Crest" late this afternoon into Saturday AM. Then light breezes Saturday afternoon. CRFC information shows the freezing level going up to near 13,000 this weekend and holding above 12,000 through much of next week. Thus spring thaw will be in
- [Clearing Skies beginning this morning will continue into the afternoon....and one more cold night expected...then Sun is king through weeks end and beyond.....](https://mammothweather.com/2013/04/17/clearing-skies-beginning-this-morning-will-continue-into-the-afternoon-and-one-more-cold-night-expected-then-sun-is-king-through-weeks-end-and-beyond/) - Wednesday AM update: Storm Total was 1 to 3 inches in town and 4 to 5 inches on Mammoth Mtn....pretty much as expected. Today's weather is highlighted by the continuation of northerly flow aloft. So winds will continue over the ridges up to 60MPH. Light breezes in town. High temperatures will remain cold today (upper
- [Cold will Hold until Wednesday....Then Fair Weather with a Warming Trend Through the Weekend.....](https://mammothweather.com/2013/04/16/cold-will-hold-until-wednesday-then-fair-weather-with-a-warming-trend-through-the-weekend/) - Tuesday Update: About 2 inches is the storm total so far. Currently....upslope conditions prevail with gusty NE flow over the crest. There could be another inch today over the upper elevations. The strong winds that gusted 50+ in the town yesterday will be much lighter today. However the upper mountain will experience a continuation of moderate to
- [More wind and cold headed for the High Country later this afternoon......Strong gusty winds will increase tonight into early Monday morning with light snow developing by late afternoon Monday....This next storm may be the last for April......](https://mammothweather.com/2013/04/14/more-wind-and-cold-headed-for-the-high-country-later-this-afternoon-strong-gusty-winds-will-increase-tonight-into-early-monday-morning-with-light-snow-developing-by-late-afternoon-monday-this/) - Monday snowfall estimates came in about the same as last night. 1 to 3 inches in town, 2 to 4 over the upper elevations. Timing for the snowfall is mostly Tonight into Tuesday night. The models came in a wee bit wetter this morning, but not by much. This still looks like the end of it through the end of April.
- [Cold Nasty System Has left 4 to 6 inches upon Mammoth Mt....Upper Low Moving East Today Takes Aim upon the Rockies of Colorado......Fair Weather is expected for the Central Sierra Mid Week....](https://mammothweather.com/2013/04/09/cold-nasty-system-has-left-4-to-6-inches-upon-mammoth-mt-upper-low-moving-east-today-takes-aim-upon-the-rockies-of-colorado-fair-weather-expected-of-the-central-sierra-mid-week/) - Yes it was a windy one! Gusts to 120 mph over the crest yesterday. Todays winds are less...however still quite strong over the sierra crest. The Owens Valley will still have a wind advisory through this evening. High temps will creep back into the 40s at resort levels..... Its Spring!......And Spring time has some of the
- [Models This Evening Converging on One Nasty Blustry Storm for the High Country.....6 Feet of Wind and 2 to 4 inches of Snow over the Higher Elevations.....](https://mammothweather.com/2013/04/05/models-this-evening-converging-on-one-nasty-blustry-storm-for-the-high-country-6-feet-of-wind-and-2-to-4-inches-of-snow-over-the-higher-elevations/) - Looks like one more decent day Saturday before a strong NW jet comes into the picture Sunday with High Winds and chilly temps. Snow showers a good bet later in the day Sunday. But the big story with be the wind and cooling Sunday afternoon into the early AM hours Monday. Mondays highs will be
- [Warmer temperatures ahead for the next couple of days.....Then unsettled weather retruns Thursday with Showers.....The following weekend looks cool by the end and Breezy to Windy....Showers likely Saturday, Sunday and Upslope showers Monday.....](https://mammothweather.com/2013/04/02/warmer-temperatures-ahead-for-the-next-couple-of-days-then-unsettled-weather-retruns-thursday-with-showers-the-following-weekend-looks-cool-by-the-end-and-windy-too-showers-likely-sunday-and/) - April will begin on a warming note. However at the same time, the outlook appears to be unsettled with showers Thursday and again over the weekend. The Thursday system has subtropical moisture in it for high snow levels. The Sunday/Monday storm now appears to be more of a Northwest/Inside slider system with gusty west winds that will come
- [Unsettled Weekend Ahead with Showers and Thunderstorms Possible...Upper Cut-Off is now on the move.....](https://mammothweather.com/2013/03/29/unsetteled-weekend-ahead-with-showers-and-thunderstorms-possible-upper-cut-off-is-now-on-the-move/) - Saturday AM Update: Last weekend update....... Precipitation to begin by late this afternoon or evening...... Latest AMSU CIRC TPW still shows about an inch of TPW wrapped into a band ahead of the cut-off low. There is a richer pool of PW off the Northern Baja coast which will most likely not be a factor. Snow
- [Upper Flow Has Now Backed to the West With Upper Flow Becoming More SW with Time......Moisture Associated with The Subtropical Jet training from the Hawaiian Islands.....Subtropical Jet to Couple with Closed Low Late in the week for the possibility of some good precipitation Over Parts of the Sierra....The Demise of the Greenland Block is at Hand......Good Riddance!](https://mammothweather.com/2013/03/26/upper-flow-has-now-backed-to-the-west-with-upper-flow-becoming-more-sw-with-time-moisture-associated-with-the-subtropical-jet-training-from-the-hawaiian-islands-subtropical-jet-to-couple-with/) - Wednesday Update: A quick look at the common teleconnections...the NAO and AO are expected to remain weakly negative the next two weeks. I think that "weakly" is the key here. The system coming into Ca Saturday night through Monday looks wet with good diffluence and upper divergence as the nose of a 100knot jet effects the
- [Upper Ridge Builds Onshore Tonight then Progresses East......Westerly Flow Develops Tuesday.....Next Storm's a Creeper with Easter Weekend in Jeopardy.....](https://mammothweather.com/2013/03/24/upper-ridge-builds-onshore-tonight-then-progresses-east-westerly-flow-develops-tuesday-next-storms-a-creeper-with-easter-weekend-in-jeopardy/) - Quick Sunday Afternoon Update: 12:30pm New 12Z ECMWF has the upper cut off drifting north to a position west of Monterrey by Sunday Am (130W-36N). By Monday a kicker trof descends out of the Gulf of AK and nudges to the upper cut NNNE to a point about 128W-39N by Monday AM. This is quite the
- [Northwest Flow Aloft to keep it Breezy over the Crest and Cool Through Friday......Diminishing Breezes Expected over the Weekend......Next Chance of Snow Mid Week Next Week...](https://mammothweather.com/2013/03/21/northwest-flow-aloft-to-keep-it-breezy-over-the-crest-and-cool-through-friday-diminishing-breezes-expected-over-the-weekend-next-change-of-snow-mid-week-next-week/) - Here is the latest on the Greenland Block. The (-AO,-NAO Combo) Wow! Look at the coming break down of the block!!!! AO index http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/ao_index_ensm.shtml NAO Index http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.sprd2.gif PNA Index http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna.sprd2.gif Even though the PNA index has had nothing to write home about, the Block to the East over the north has.... The Dweebs believe that
- [Current Storm System Off Shore Has Plenty of Fuel....However Not Much Spark! Nevertheless Mammoth Mt will get a nice Freshing of its Surface Mid week.....The Following Weekend Will be Fair...](https://mammothweather.com/2013/03/18/current-storm-system-off-shore-has-plenty-of-fuel-however-not-much-spark-nevertheless-mammoth-mt-will-get-a-nice-freshing-of-its-surface-mid-week-the-following-weekend-will-be-fair/) - Tuesday Evening.... -AO and -NAO still is expected to break down by month end.... Technically, we should have a pattern change going into the end of the month..... Say good-bye to Winter....Spring arrives at 4:02AM Wednesday.... What do you get with a juiced up atmosphere with no spark? A wasted opportunity that is for sure....
- [More Snow Expected Next Week......However Less Than Earlier Expected.......More Updates Next Week.......](https://mammothweather.com/2013/03/15/more-snow-expected-next-week-however-less-than-earlier-expected-more-updates-next-week/) - Sunday PM Update: Models have come in a little wetter this afternoon with the EC generating up to an inch over the crest. I think that is good for the crest. This is for the period Tuesday through Thursday AM. The GFS is a bit dryer. However, it too is a bit wetter then
- [Stubborn Greenland Block holds tough....However may pull far enough north next week to allow a few storms into the Central Coast](https://mammothweather.com/2013/03/13/stubborn-greenland-block-holds-tough-however-may-pull-far-enough-north-next-week-to-allow-a-few-storms-into-the-central-coast/) - All the Dweebs can say is Wow! Our weather is way too nice for this time of the year..... The strong upper high over California will weaken this weekend to allow considerable high clouds into our area beginning later Thursday. Temps will remain in the low 60s until Friday when a slow cooling trend develops.
- [Storm Now Winding Down....Mammoth Mountain Picks Up...Up to Two Feet of Fresh Powder.....Skiing and Boarding At Its Best Again!!](https://mammothweather.com/2013/03/08/storm-now-winding-down-mammoth-mountain-picks-up-up-to-two-feet-of-fresh-powder-skiing-and-boarding-at-its-best-again/) - As of 6:15 PM...snow showers were in progress with some light NNW flow. The main upper low was moving into Arizona while a secondary short wave associated with the trailing upper jet was headed down the coast and effecting mainly the Southern Sierra and Mojave Desert.. At the same time, the upper trof was progressing east
- [Winds on the the increase today with snowfall developing later tonight.....Snowfall on and off through Friday followed by slow improving weekend weather.....Then very nice WX early next week....](https://mammothweather.com/2013/03/05/winds-on-the-the-increase-today-with-snowfall-developing-later-tonight-snowfall-on-and-off-through-friday-followed-by-slow-improving-weekend-weather-then-very-nice-wx-early-next-week/) - Quick Thursday Afternoon Update: Storm progressing nicely and as expected with nice deformation zone set up over Mono County. Snow will continue to fall tonight and into tomorrow. Looks like upper limits of 2 feet in the powder bowls will be reached by this evening as snowfall rates kicked up quite a bit this afternoon.
- [Active Weather Pattern Returning To The Eastern Sierra Beginning Tonight.....Then Moderate Snowstorm Expected Tuesday Afternoon Through Wednesday Night....Weather Turning Colder Again Second half of Next Week...](https://mammothweather.com/2013/03/02/active-weather-pattern-returning-to-the-eastern-sierra-beginning-tonight-then-moderate-snowstorm-expected-tuesday-afternoon-through-wednesday-night-weather-turning-colder-again-second-half-of-n/) - Tuesday Am Update: Latest CRFC QPF shows 1.04 for Yosemite Freezing Level at 6000 to slightly above. The heaviest most concentrated shot of precip will be with the front between 12z and 18Z Wednesday. (4:00am and 10:00AM) ...then frequent snow showers through out the afternoon. The 12z Tues GFS 700mb=Rh has has us in 90% with the Front mid morning then 70% Wednesday
- [Warmer Temps the next few days then increasing clouds Saturday Night with a chance of Rain and Snowshowers Sunday.......](https://mammothweather.com/2013/02/27/warmer-temps-the-next-few-days-then-increasing-clouds-saturday-night-with-a-chance-or-rain-or-snow-late-saturday-night-and-sunday/) - Dweeb Update: Star date 2.27.13@9:20pmPST.... Nice quite evening.....all calm on the western front...Temps in the upper 20s.... Latest operational 00z Thursday GFS has a rather unimpressive off shore ridge out about 130west that will progress into the west coast Friday. As it does...it stands up over the state. IE Amplification upstream will be the pump. As
- [Another Dry Week Ahead......March to Roll in Like a Lamb...The Dweebs Prefer the Lion.....](https://mammothweather.com/2013/02/24/another-dry-week-ahead-march-to-roll-in-like-a-lamb-the-dweebs-prefer-the-lion/) - A gradual Warming trend is expected this week. Last week.....The MJO rolled through the Indian Ocean, retrogression occurred across the CONUS and the long wave trof was over the Great Basin and Rockies. It got cold....we received some light snowfall and that as it! Obviously there is more to forecasting longer range than the just the track and amplitude of MJO.
- [Platinum Powder Alert Canceled for the Morning......Light accumulations are still expected over night......Cold Showery Weather On and Off for a week....](https://mammothweather.com/2013/02/19/plainum-powder-alert-canceled-for-the-morning-light-accumulations-are-still-expected-over-night-cold-showery-weather-on-and-off-for-a-week/) - Wednesday PM: The Dweebs are not liking today's 6 to 10 day and 8 to 14 day 500mb height maps for late Feb and early March...... Strong +PNA and -NAO are highlighted.... Wednesday AM update: The upper low over Southern Ca will slowly shift east into AZ today. Up-slope snow showers are falling along
- [Moderate Winter Storm in Process.....forecast for 12 to 18 inches still looks good.....Platinum Powder Alert for Mammoth Mtn Reiterated for Wednesday Morning....](https://mammothweather.com/2013/02/19/moderate-winter-storm-in-process-forecast-for-12-to-18-inches-still-looks-good-platinum-powder-alert-for-mammoth-mtn-reiterated-for-wednesday-morning/) - Yes its snowing!! Snowfall ratios will be in the order of 15:1 or greater with this storm so the powder will be light and dry!......Not much to add to previous forecast other then Central Nevada area mountains will get a lot of snow...like 1 to 2 feet! The snowfall forecast for elevations between the Village
- [Long Awaited Pattern Change Just 24 hours Ahead.....Good Shot of Snow Expected for the High Country Tuesday and Tuesday Night.....Platinum Powder Alert for Mammoth Mt.](https://mammothweather.com/2013/02/17/long-awaited-pattern-change-just-a-couple-a-days-away-good-shot-of-snow-expected-for-the-high-country-tuesday-and-tuesday-night-platinum-powder-alert-for-mammoth-mt/) - QUICK MONDAY UPDATE: Everything on track including the storm....It will be dry today but will be increasingly windy during the afternoon.....Highs in the upper 40s in town and upper 30s on Mammoth Mtn. Cold...Snowy...Blustery Weather Tuesday. The storm is expected to drop between 12 & 18 inches up on Mammoth Mtn and about 6 to 12 inches
- [Fair and Warmer this week....Lighter breezes.....Pattern Change Next Week to Colder then Showery Weather...Otherwise Dry Weather Through Sunday....](https://mammothweather.com/2013/02/12/fair-and-warmer-this-week-lighter-breezes-pattern-change-next-week-to-colder-weather-dry-weather-through-sunday/) - The weather will remain fair through Sunday with a gradual warming trend. High temps will finally move above freezing over Mammoth with temps in the upper 30 today and 40s Wednesday through Thursday. We may expect highs in the 50s Friday and Saturday. Lows at night in the teens and twenties. Winds in town will
- [Inside Slider Brought a dusting last night.....Upper jet to shift east through Tomorrow with Sierra Crest Winds Diminishing Rapidly Tuesday....Another dry week ahead....MJO both on the move Again and Strengthing.....Expected to move out over Indian Ocean this Week Heralding a Flip in the PNA....](https://mammothweather.com/2013/02/11/inside-slider-brought-a-dusting-last-night-upper-jet-to-shift-east-through-tomorrow-with-sierra-crest-winds-diminishing-rapidly-tuesday-another-dry-week-ahead-mjo-both-on-the-move-again-and/) - Quick Update: Gusty NE winds to continue over the crest today diminishing tomorrow....Expect a slow warming trend.....with low to mid 30s today.....Upper 30s to low 40s Tuesday and 40s Wednesday and Thursday....with highs in the low 50s by Saturday.....Night time lows will range in the single digits tonight then moderate into the teens and
- [Mammoth Mt reports 3 to 6 inches storm total......Cold Upper low over the Desert Southwest will slowly exit over the weekend leaving cold temps and gusty upper elevation winds....Milder weather is expected by Mid-Week....](https://mammothweather.com/2013/02/09/mammoth-mt-reports-3-to-6-inches-storm-total-cold-upper-low-over-the-desert-southwest-will-slowly-exit-over-the-weekend-leaving-cold-temps-and-gusty-upper-elevation-winds/) - Upper pattern shows a cold closed low pressure system along the UT/AZ boarder shifting east. By this afternoon the upper center will be just north of four-corners. In its wake, a strong northerly flow will continue over Eastern Ca with strong gusty Sierra Crest winds and below normal temps. There is even a small short
- [Small Storm to move into the Sierra Late Thursday....light amounts expected with 2 to 6 inches in the Forecast for the Town and 6 to 8 inches over the higher elevations Thursday Night through Friday Night...Still Waiting on the MJO....Moderate Confidence that it will enter the Western Indian Ocean 2nd half of February with West Coast Long Wave Trof set up as well by end of month............](https://mammothweather.com/2013/02/06/small-storm-to-move-into-the-sierra-late-thursday-light-amounts-expected-with-3-to-5-inches-in-the-forecast-for-the-town-and-6-inches-over-the-higher-elevations-thursday-night-through-friday-night/) - Friday Morning Update: 8:43AM A cold upper Low has formed a "closed center" over the Central San Joaquin Valley this morning. Light snowfall is currently occurring in Mammoth at the moment. However, the main upper jet energy remains both to the West and south of us. Strongest vertical motion is moving inland over Southern California with
- [Will the next storm bring some 3 to 6 inches or will it be another 12+ inch Blunder?......Models back peddling again on amounts for the Thursday-Friday Storm...](https://mammothweather.com/2013/02/05/will-the-next-storm-bring-some-3-to-6-inches-or-will-it-be-another-12-inch-blunder-models-back-peddling-again-on-amounts-for-the-thursday-friday-storm/) - The next storm......Deja Vu? A lot depends upon how this storm comes in. We already know from several events this winter.....about the large lake effect when it comes to an upper low and its circulation over the ocean that will pick up moisture and bring a foot or better here in the high country. We
- [Upper Ridge over the far west will flatten by mid week to allow moderate snow producer into the high country...otherwise pattern to continue dry.](https://mammothweather.com/2013/02/03/upper-ridge-over-the-far-west-will-flatten-by-mid-week-to-allow-small-snow-producer-into-the-high-country-otherwise-pattern-to-continue-dry/) - Monday morning update shows QPF on the rise with the Thursday system.....ECMWF has better over water trajectory and orographics. System capable of a foot+ now over higher terrain. Timing to begin Wednesday evening. This appears to be a one shot system with a period of showery weather behind the front. Temps to be a lot
- [Upper Ridge to Continue its Hold over the West....Light Breezes over the Upper Elevations....Next Snow Producer about a Week Away.......](https://mammothweather.com/2013/02/01/upper-ridge-to-continue-its-hold-over-the-west-light-breezes-over-the-upper-elevations-next-snow-producer-about-a-week-away/) - The Resort Levels at 8000 ft of the Eastern Sierra will continue to be fair for the next 5 days with highs 45 to 50 and lows in the 20-25 at 8000 ft. The Ridge Trof Pattern is a Stable one, however will begin to shift east a bit by Mid week. Latest timing for
- [Cloudy Skies this Morning to give way to Sunshine by Wednesday...Seasonal Temperatures or Above Returning to the High Country.....Fair Through the Weekend...The MJO is on the move again...](https://mammothweather.com/2013/01/29/cloudy-skies-this-morning-to-give-way-to-sunshine-by-wednesday-seasonal-temperatures-returning-to-the-high-country-fair-through-the-weekend/) - Pretty big Arctic system dropping out of Alberta, Canada this morning. Strong North/South 130kt upper jet along the NV/UT border. Eastern Nv through the Rockies could get some platinum powder today.... Just NE winds over the Crest for Mammoth today. Clouds may kick off a few flurries as well. Not much else going on for Eastern Ca other than a
- [Mammoth Mountain Picked up between 4 and 8 inches this morning.....Lingering snowshowers are in process this evening....It will be Colder Monday.....Longer Range is Still Clouded until the MJO gets off the Dime.....](https://mammothweather.com/2013/01/27/mammoth-mountain-picked-up-between-4-and-8-inches-this-morning-lingering-snowshowers-are-in-process-this-evening-it-will-be-colder-monday-longer-range-is-still-clouded-until-the-mjo-gets-of/) - A small relatively moisture starved storm managed to dump 4 to 8 inches of welcomed snowfall on Mammoth Mountain.. Although the QPF from all sources were under a quarter of an inch, strong orographics, cold temps and strong upslope winds were enough to squeeze out several inches including about 4 inches at the Village at the Mammoth.
- [Unsettled weather expected this weekend with some snow showers...any accumulations will be light.....Weather to turn colder with windy periods...Saturday night and again Sunday Night....Monday will begin Cold then Milder Weather Returning by Mid Week...](https://mammothweather.com/2013/01/25/unsettelled-weather-expected-this-weekend-with-some-snow-showers-any-accumulations-will-be-light-weather-to-turn-colder-sunday-night-monday-then-become-milder-as-the-week-goes-on/) - Saturday AM: MJO still stuck in Phase 7. _________________________________________________________________________________________________________________________________________________________________ Ridge in the west....trof in the east, MJO is in phase 7. It all adds up to a drier then normal pattern for our area...with lots of splits in the short wave action and cut off lows for the west coast. Typically this is not a
- [Complicated pattern for the High Country next 5 days....Periods of Light Snowfall expected over the Upper Elevations through Monday....Turning Colder again early next week.....](https://mammothweather.com/2013/01/23/complicated-pattern-for-the-high-country-next-5-days-periods-of-light-snowfall-expected-over-the-upper-elevations-through-monday-turning-colder-again-early-next-week/) - What happened to the models!! Early yesterday AM confidence was increasing...now it has collapsed as they all going their own ways on handling the next 5 days. Again...The forecast models have gone their own way in trying to handle the energy over the eastern pacific. The upshot is the Euro model has gone a lot
- [Storm System for the Weekend looks to Dump Upwards to 2 feet on Old Woolly.....Then Snow Showery and Cold Monday for a Powder Day!](https://mammothweather.com/2013/01/22/storm-system-for-the-weekend-looks-to-dump-upwards-to-between-1-to-2-feet-on-old-woolly/) - Confidence is now increasing between the GFS and the EC that the "slower more clustered ECMWF ensemble solution" will bring a good snow producing system to the Sierra over the weekend. In that now we have better agreement that the slower solution is preferred, upwards to two feet of snowfall is expected over Mammoth Mountain based upon last nights 00z Tuesday guidance.
- [Mid Winter Dry Spell Will Gradually Come to an End This Week Bringing Relief to Those Living Below The Inversion.....MJO on the Move......>>](https://mammothweather.com/2013/01/20/mid-winter-dry-spell-will-gradually-come-to-an-end-this-week-bringing-relief-to-those-living-below-the-inversion-mjo-on-the-move/) - Sunday Evening Update: Took a look at the Sunday 12Z ECMWF QPF for next Sunday night through Monday night over the Mammoth Crest. It dumps between 3 to 4 inches of water eq compared to the 18z GFS which dumps about 1/2 an inch the same time. Lets see...that the difference is about 5 inches of snow
- [Mid-Winter Dry Spells the Norm...Not the Unusual....Weather to Remain Dry Another Week......](https://mammothweather.com/2013/01/18/mid-winter-dry-spells-the-norm-not-the-unusual-weather-to-remain-dry-another-week/) - Quick Update Saturday AM: It was another cold one in the Bridgeport Valley with Bryant Field checking in with a bone chillin -17F at 7:00am. Highs were in the teens yesterday..... The High temperature yesterday reached 46 degrees at the Village at Mammoth. The low this morning at the Village was 18F, while in
- [Winter's Severe Cold Snap is Now Broken....Only the Valleys of Mono County Remaining Cold......MJO on the Move!!!](https://mammothweather.com/2013/01/15/winters-severe-cold-snap-is-now-broken-only-the-valleys-of-mono-county-remaining-cold-mjo-on-the-move/) - Quick Update Wednesday AM: Quasi stationary upper high is located about 150 to 200 Miles west of SFO. At 700MB (10,000ft), it shifts toward Northern Ca tonight as the winds then become more Northeasterly. By Thursday PM, 700MB winds are easterly over the Lip as the 700mb high is centered over Northern Ca. By Saturday and
- [The Cold is Here and Likely to Stay through Monday....However...Resort Levels to be Much Milder by Mid-Week](https://mammothweather.com/2013/01/11/the-cold-is-here-and-likely-to-stay-through-monday-however-resort-levels-to-be-much-milder-by-mid-week/) - Some Snowshowers expected on and off this weekend....... It was 0F here at MammothWeather.com at the 8200 foot level at 6:00AM and the upper ridge was still amping northward at 140W with the promise of yet another surge of even colder modified Arctic Air into the region tonight. Within the upper flow are several Vort centers that are
- [Another Wave of Cold to hit the Sierra Thursday with well below normal temperatures....Some Light Snowfall expected Thursday with Friday the Coldest Day....The Cold will remain into the Weekend with milder weather returning by the middle of next week at Resort Levels.....](https://mammothweather.com/2013/01/08/another-wave-of-cold-to-hit-the-sierra-thursday-with-well-below-temperatures-some-light-snowfall-expected-thursday-with-friday-the-coldest-day-the-cold-will-remain-into-the-weekend-with-milder-w/) - A well amped upper ridge will build northward along 140W tapping some Western Canadian Air which then plummets south down the west coast. This will bring the return to frigid conditions by Thursday night that will remain through the Weekend. Light snowfall will develop late Wednesday night toward Midnight and continue into Thursday. At the moment, only
- [Upper Low Located Just southeast of Monterrey....To shift slowly ESE this AM....Then Slowly SE tonight...Snowfall to increase Later this morning for the Crest and Resort Levels...](https://mammothweather.com/2013/01/06/upper-low-located-just-south-of-monterrey-to-shift-ese-this-am-then-sse-into-tonight-snowfall-to-increase-this-morning-for-the-crest-and-resort-levels/) - 10:00AM update: Although the track of the upper low was forecasted to move ESE. The actual track is right down the coast so far. So it appears now that the crest will not benefit from any significant UVM. Upslope is already beginning to show up on the wave loop and so will back down snowfall amounts for today to
- [Cold weather to continue for the far west with next spliting system bringing light amounts of up to 6 to 12 inches over the higher elevations Sunday/Night..Weather to turn even colder by Mid Month....](https://mammothweather.com/2013/01/04/cold-weather-to-contionue-for-the-far-west-with-next-spliting-system-bringing-light-amounts-of-up-to-6-to-8-inches-over-the-higher-elevations-sundaynight-weather-to-turn-even-colder-by-mid-month/) - 12:00pm Saturday Update: New 12z ECMWF is in and looking at 240 hours out, dumps all the cold air into the great basin like last nights GFS. Now take a look at the 6 to 10 day outlook for the Great Basin.....Burr!!! As well as the analogs: http://www.cpc.ncep.noaa.gov/products/predictions/610day/610analog.off.gif Analog Temps probabilities... http://www.cpc.ncep.noaa.gov/products/predictions/610day/610analog.temp.gif Also the GFS
- [Upper Ridge in the mean anchored over the Far West to keep a persistent Dry Cold pattern in place for California......Split Flow Pattern for the Rest of the Country....](https://mammothweather.com/2013/01/02/upper-ridge-in-the-mean-anchored-over-the-far-west-to-keep-a-persistant-dry-cold-pattern-in-place-for-california-split-flow-pattern-for-the-rest-of-the-country/) - Thursday Am Post: Not as chilly yesterday with a strong inversion setting up. Highs popped to the upper 30s and low 40s while valleys continued in the deep freeze down into the teens and 20s. In January when this occurs...the true "Banana Belt" within the Mammoth Eastern Sierra is about from 7800 Feet to Canyon Lodge....Usually not the Trails
- [Lots of Sunshine today...Then some clouds and a few flurries possible News Years Day PM....Weather to continue excellent for all outdoor Winter Enthusiasts](https://mammothweather.com/2012/12/31/lots-of-sunshine-today-then-some-clouds-and-a-few-flurries-possible-news-years-day-pm-weather-to-continue-excellent-for-all-outdoor-winter-enthusiasts/) - POSITIVE AO DEVELOPING>>>>>> Brief New Years Eve Update: Ridge in the West.... Trof over the Central US. Our weather pattern will highlight drier then normal precipitation and colder then normal temps. The Eastern Pacific high has found a home between the far eastern pacific and the far west. Any storm that happens to make
- [Light Upslope Flow to keep Snow showers in the Forecast Today and Again Sunday.....a few inches here and their are expected.....Weather to remain colder then normal through the Holiday......](https://mammothweather.com/2012/12/29/light-upslope-flow-to-keep-snow-showers-in-the-forecast-today-and-again-sunday-a-few-inches-here-and-their-are-expected-weather-to-remain-colder-then-normal-through-the-holiday/) - Satellite motion shows a cold upper level low moving SE along/near the Ca coast line. South east flow has already developed over the Owens Valley and the Upper flow is beginning to veer more out of the NE along the Eastern Sierra. 500MB Temps are as cold as -27C in the cold core near Oakland, Ca this
- [Nice Break in the Action Today......Cold Forecast continues through Years End....Dweebs Not Buying into Dry Snowless Forecast Next Two Weeks......](https://mammothweather.com/2012/12/28/nice-break-in-the-action-today-cold-forecast-continues-through-years-end-dweebs-not-buying-into-dry-snowless-forecast-next-two-weeks/) - It was cold this morning...Mammoth Airport Hit -17 twice this morning. Once at 5:15am and again about 7:50am. That's cold! Short wave ridging was the reason for the very cold temps in the valleys below the resort levels, as the air aloft was forced to the surface by subsidence. Radiational cooling, and especially subsidence has an effect
- [The Town of Mammoth and Mammoth Mountain picks up between 12 to 24 inches of new....Additional lighter accumulations are expected today and tonight.....Weather to Remain Cold through Year's End....](https://mammothweather.com/2012/12/26/the-town-of-mammoth-and-mammoth-mountain-picks-up-between-12-to-18-inches-of-new-additional-lighter-accumulations-are-expected-today-and-tonight-weather-to-remain-cold-through-year-end/) - 3:30pm Update The main precipitation portion is now over for the high country with possibly an additional 3 to 6 inches today in town and some 2 to 4 additional tonight. As of 3:30pm Mammoth mountain picked up another 8 inches since 6:00am this morning. The next system will split as it drops SE into Ca with main precipitation limited to coastal
- [Mammoth Mountain gets between 3 to 5 feet storm total Top to Bottom with the Town 2 to 3 feet....more on the way!!! ](https://mammothweather.com/2012/12/24/mammoth-mountain-gets-between-3-to-5-feet-storm-total-top-to-bottom-with-the-town-2-to-3-feet-more-on-the-way/) - I'm Dweebin of a White Christmas..... Just like the ones we had before.... With Mammoth MT in full operation And its skiers giving ovation To hear sleigh bells ringing through the snow..... Great Storm!!!! Today Christmas Eve is clean up day.....Loader drivers started early this morning...hoping to get done in time to spend with their families..... The whole pattern is
- [Sierra to Get Pounded Again Today with Heavy Snowfall this Afternoon and Night.....Another 2 to 3 feet is expected over the Crest by Midnight Tonight.](https://mammothweather.com/2012/12/23/sierra-to-get-pounded-again-today-with-heavy-snowfall-this-afternoon-and-night-another-2-to-3-feet-is-expected-over-the-crest-by-midnight-tonight/) - Sunday Morning Update....Mammoth Mountain reports a storm total of 2 feet so far with the storms grand finale hitting this afternoon and night......Another 2 to 3 feet possible! Winds are on the increase again after about 7 hours without much measurable precipitation. SFO Radar showing precipitation increasing again from the west and it will not be
- ["Night of Lights" Tonight at Canyon Lodge will be Nothing Short of Spectacular, as Snowfall Rates Decline After 4:00pm.....Snowfall Rates to pick up again after 10:00am Sunday.....](https://mammothweather.com/2012/12/22/night-of-lights-tonight-at-canyon-lodge-will-be-nothing-short-of-spectacular-as-snowfall-rates-decline-after-400pm-snowfall-rates-to-pick-up-again-afer-1000am-sunday/) - Still plenty of storm to go..... Mammoth Mountain recently reported 18 inches of new since early this morning.....and at the Village at Mammoth there is about a foot or so. Although the first wave stayed mainly to our north last night....the second and third wave will more than make up for it. The Dweebs
- [Storms a Creeper...However will be into Southern Mono by Late Today.....Winter Storm Warnings Hoisted for Travelers Tonight........](https://mammothweather.com/2012/12/21/storms-a-creeper-however-will-be-into-southern-mono-by-late-today-winter-storm-warnings-hoisted-for-travelers-tonight/) - As of 4:00pm Friday.....Slow progress is still being made by the cold front through Mono County. It was snowing over Tioga Pass. So it will not be much longer before it gets here! Deep Cold Upper vortex churns west of Washington state with frontal band currently moving through Northern California. It's raining in the Bay Area with the
- [Winter Storm Warning Hoisted for Mono County for Late Friday Afternoon....Cold Upper Mother Low setting up for Series of Waves of Moisture into Southern Mono.....2 to 5 Feet expected by Monday AM......Longer Range Pattern Suggests Storm Track Shifting South With Time Hitting Southern Sierra Head on after New Years........](https://mammothweather.com/2012/12/20/winter-storm-warning-hoisted-for-mono-county-for-late-friday-afternoon-cold-upper-mother-low-setting-up-for-series-of-waves-of-moisture-into-southern-mono-2-to-5-feet-expected-by-monday-am/) - The Dweebs have had plenty on their plates well ahead of their upcoming tradition holiday feast! We keep looking for the classic NW Atlantic Block to develop forcing a strong -NAO to the ridge up the west coast +PNA fashion, but at this time it is no where in sight! One reason is that
- [Mammoth Mountain picks up another 2 to 3 feet over the past 60 hours....Very cold temperatures expected tonight and quite cold but fair Wednesday....Next Storm Rolls in Friday Mid Morning......](https://mammothweather.com/2012/12/18/mammoth-mountain-picks-up-another-20-to-30-inches-over-the-past-48-hours-very-cold-temperatures-expected-tonight-and-quite-cold-but-fair-wednesday-next-storm-rolls-in-early-friday-morning/) - More snowfall blanketed the Mammoth area yesterday and last night with amounts about 15 inches at elevations above 8,000 feet 24 inches at 9000 and an estimated 3 feet above 10K. Once again, the QPF in the models woefully under estimated the combination of the moist upper flow pattern and orographics as along the 395 corridor through Long
- [More unsettled weather today with gusty winds and light snowfall. Most of the snowfall will occur after midnight tonight and especially mid morning Tuesday....It will be fair and cold Wednesday....More snowfall expected this weekend.....](https://mammothweather.com/2012/12/17/more-unsettled-weather-today-with-gusty-winds-and-light-snowfall-most-of-the-snowfall-will-occur-after-midnight-tonight-and-especially-mid-morning-tuesday-it-will-be-fair-and-cold-wednesday-mor/) - Update to reflect additional accumulations.... Forecasters still having a diffacult time with the QPF and orographics for our area. Update to reflect accumulations of 5 to 8 inches in town and 12 to 18 inches over upper elevations by noon Tuesday..... Monday AM: A light to moderate snow producing system is moving into the high country
- [The Weekend continues with very light snowfall Tonight through Monday Morning with rising snow levels.......Best snowfall looks to be later Monday into Tuesday Night....](https://mammothweather.com/2012/12/15/the-weekends-continue-with-very-light-snowfall-tonight-through-monday-morning-with-rising-snow-levels-best-snowfall-looks-to-be-later-monday-into-tuesday-night/) - Sunday AM update: Windy today and through Tuesday with a slight chance of snow showers today through tonight.....Highs in the 30s.... Snow increasing again by Monday sunrise with snow through the day and into the night tapering off Tuesday after mid- morning. Show showers Tuesday afternoon. Amounts still look light to moderate with about a
- [The weather over the weekend looks to be mixed with some sun, some light snow....and some Excellent Ski Conditions......The "AR" Drums are beating louder this morning for the West Coast later this month...........](https://mammothweather.com/2012/12/14/the-weather-over-the-weekend-looks-to-be-mixed-with-some-sun-some-light-snow-and-some-excellent-ski-conditions-the-ar-drums-are-beating-louder-this-morning-for-the-west-coast-later-this-month/) - Some decent weather this weekend with a great base of snow, set up on Mammoth Mountain..... The Snow is squeaky and dry this morning.....ego snow as they say...... Expect snow showers possible later today and tonight with a dusting to an inch or so. The next weather system is really moisture that is over running the flat ridge building
- [Stalled Front Over Southern Mono County Late Yesterday Afternoon Dumps 9 Inches at the Village and 16 inches On Old Woolly.....Apparently.....Storms are lined up Next Week for Best Christmas Ever!!!](https://mammothweather.com/2012/12/13/stalled-front-over-southern-mono-county-late-yesterday-afternoon-dumps-9-inches-at-the-village-and-16-inches-on-old-woolly-apparently-storms-are-lined-up-next-week-for-best-christmas-ever/) - An active weather pattern is expected to continue for the next week. However, there are still a few more parts of the current pattern to keep the weather unsettled through the weekend. Here are the WX players both today and through the weekend: 1. The weather for today Thursday will be highlighted by an exiting upper low at
- [Spliting Trof to Bring Light Snowfall Today and Tonight.....Then another weakening system is expected later in the weekend.....Stronger, Better Snow producing Weather Systems are expected to begin about the middle of Next Week.........](https://mammothweather.com/2012/12/12/spliting-trof-to-bring-light-snowfall-today-and-tonight-then-another-weakeningf-system-is-expected-later-in-the-weekend-stronger-better-snow-producing-weather-systems-are-expected-to-begin-ab/) - The ECMWF is in...... The Saturday Sunday storm is a dud..... ______________________________________________________________________________________________________ Not much has changed from yesterdays thinking as the current trof is well into splitting SSEastward. A weakening cold front will bring the possibility of a few inches of snow today, however, it is expected to stall over southern Mono County tonight with
- [More rippen and tearing for the weather system coming in Wednesday.....Weather turning much colder in the days ahead....."Is Another Atmospheric River event headed for Ca again??](https://mammothweather.com/2012/12/11/more-rippen-and-tearing-for-the-weather-system-coming-in-wednesday-weather-turning-much-colder-in-the-days-ahead-is-another-atmospheric-river-event-headed-for-ca-again/) - Because of the critical wave length of the long wave features; both upstream over the eastern pacific and down stream across the CONUS, the upcoming short wave coming into California, will split off shore...with a significant amount of energy driving south down the coast. What is critical for the Central Sierra is how close will the system get to
- [A Series of Moderate Snow producing weather systems will move through mainly Central and Southern California.....Cooler Weather with lower freezing levels expected....](https://mammothweather.com/2012/12/10/a-series-of-moderate-snow-producing-weather-systems-will-move-through-mainly-central-and-southern-california-cooler-weather-with-lower-freezing-levels-expected/) - Monday Am Update....Wednesday's storm is a Moderate Class Storm:
- [Slow Retrogression of the Eastern Pacific High to begin this weekend with the first of the inside sliders to effect the high country in the form of cooler breezy weather Sunday....](https://mammothweather.com/2012/12/07/slow-retrogression-of-the-eastern-pacific-high-to-begin-this-weekend-with-the-first-of-the-inside-sliders-to-effect-the-high-country-in-the-form-of-cooler-breezy-weather-sunday/) - ______________________________________________________________________________________________________________________________ Over the next two weeks, a pattern of slow retrogression of the eastern pacific high will take place allowing short wave Trofs to begin their march into the CONUS from the Pacific Northwest about Midnight tonight. The 140 knot upper jet slices diagonally through the state of Washington as it become more north/south
- [One Last shot of Snow and Rain from the Subtropical Jet Today then Pattern Change this Weekend leading to a Cool and Dry weekend and beyond.....](https://mammothweather.com/2012/12/05/one-last-shot-of-snow-and-rain-from-the-subtropical-jet-today-then-pattern-change-this-weekend-leading-to-a-cool-and-dry-weekend-and-beyond/) - The last in the series of subtropical jet related systems to effect Mono County will arrive later today. Gusty winds have been blowing most of the night and will continue to do so throughout the day. The snow level will be about 8700 today down to 8300 tonight. Over the upper elevations,A few inches of
- [West Coast Atmospheric River Winds Down this Week Lending to Inside Slider Pattern by Sunday....Further Retrogression Next Week Lends to Possible Cold Snowy Pattern....](https://mammothweather.com/2012/12/03/west-coast-atmospheric-river-winds-down-this-week-lending-to-inside-slider-pattern-by-sunday-further-retrogression-next-week-lends-to-possible-cold-snowy-pattern/) - Tuesday Am Update: Remains of last short wave will move through as mostly warm advection precip. IE Rain up to 10K. About .4 to .5 QPF is in the picture for the crest. Wednesday night's snow level drops to about 8500...however system is mostly through. Inside slider pattern this weekend for chance of snow
- [Strong Cold Front on the way and Accelerating SE-ward.....Cooling is expected by Noon with heavy snowfall expected above 8000 feet today....Winter Storm Warning in effect for elevations above 8000ft this afternoon....](https://mammothweather.com/2012/12/02/strong-coldfront-on-the-way-cooling-is-expected-by-noon-with-heavy-snowfall-expected-above-8000-feet-today-winter-storm-warning-in-effect-for-elevations-above-8000ft-this-afternoon/) - 3:30pm Update: Weather Fronts Through....Snowshowers Now.... Time for clean up.... ____________________________________________________________________________________________________________ Sunday 10:00am: Heaviest precipitation "to begin" between 10:00AM and 12:00 Noon Sunday.... Main Lodge at 9:00am.....Rain/Rain Snow Mix...... At 10:30 all snow at Main Lodge..."Freezing Level 9800 will lower to 9500 by about 10:00am then down to 9,000 ft by 4:00pm......Snow Level to Fall to
- [Atmospheric River Event Continues......More Flooding for Northern Ca and More Snow Headed for The Upper Elevations....](https://mammothweather.com/2012/12/01/atmospheric-river-event-continues-more-flooding-for-northern-ca-and-more-snow-headed-for-the-upper-elevations/) - Sunday AM: Heaviest precipitation "to begin" between 10:am and 12:00 noon Sunday.... Main Lodge at 9:00am.....Rain/Rain Snow Mix...... Freezing level 9800 will lower to 9500 by about 10:00am then down to 9,000 ft by 4:00pm...... ALL Snow at/above McCoy......>>>> No micro physical processes at work to promote snow level lower then expected. Column not saturated from
- [Short Term "AR" Event Expected for Northern Ca.....Three Storms to Effect Our Area Over the Next 5 Days....](https://mammothweather.com/2012/11/28/short-term-ar-event-expected-for-northern-ca-three-storms-to-effect-our-area-over-the-next-5-days/) - Friday Night Update: 5:45pm Since 2:00pm Wednesday to 4:00pm Friday, 4.00 inches of liquid on Mammoth Pass and still coming down.. Estimated 2.5 to 3.5 feet on Mammoth Mtn past 24 hours Snow to taper off this evening with little change in snow level. A 3 more inches possible, except that orographics may contribute to double
- [One More Decent Day then Showtime begins for Mother Nature....Lots of Possibilities....from Atmospheric River over Northern Ca.....To Protracted Precipitation Event....](https://mammothweather.com/2012/11/27/one-more-decient-day-then-showtime-begins-for-mother-nature-lots-of-possibilities-from-atmospheric-river-to-protracted-precipitation-event/) - Tuesday AM: More western pacific TS phasing issues with new 12z GFS Run..... Dweebs not happy with this particular run because how warm it will be. Note: Snow levels and freezing levels are "not" the same!! Overall still looking at two storms. The first rolls in Wednesday with "Freezing levels" about 8500 lowering to
- [Mild Weather With Above Normal Temps to Continue a Few More Days before Subtropical Jet Exerts its Influence upon Mono County.....Wet Weather Ahead with more Base Building Precipitation Expected for Elevations Mainly above 9,000 ft Beginning Wednesday....](https://mammothweather.com/2012/11/26/mild-weather-with-above-normal-temps-to-continue-a-few-more-days-before-subtropical-jet-exerts-its-influence-upon-mono-county-wet-weather-ahead-with-more-base-building-precipitation-expected-for-e/) - 5:40pm Monday Update: Confidence increasing for a long duration....high impact precipitation event for the northern and central sierra beginning Wednesday..... 18z GFS is less retrogressive now over the next 6 to 10 days......Stay tuned, we may get some cold air in here yet!!!! Updates at anytime..... Pattern changes are underway as more wet and wild
- [Gusty Winds and Snow/Rain Showers will diminish later today with fair weather returning for Thanksgiving and the weekend......Continental Air early next week to provide for some cooling Monday and Tuesday......Chance of a storm the following weekend....](https://mammothweather.com/2012/11/21/gusty-winds-and-snowrain-showers-will-diminish-later-today-with-fair-weather-returning-for-thanksgiving-and-the-weekend-continental-air-early-next-week-to-provide-for-some-cooling-monday-and-tue/) - Snow and rain showers developed early this morning as another Trof affects mainly the northern portion of the golden state. The system is regarded as more of a nuisance weather wise. If it is not going to lay down some serious additional snow, or give us some cold weather for additional snow-making, it might as well be fair
- [Storm System Winds Down as Cold Front Dissipates over Mono County this Morning.....Mammoth Mtn picks up between 1 and 2 feet between 9000 and 11,000 ft as expected.....Improving weather now expected for much of this week but lots of clouds remaining in the forecast.....Will California be hit with an Atmospheric River Event this Winter?](https://mammothweather.com/2012/11/18/storm-system-winds-down-as-cold-front-dissipates-over-mono-county-the-morning-mammoth-mtn-picks-up-between-1-and-2-feet-between-9000-and11000-ft-as-expected-improving-weather-now-expected-for/) - Current Forecasts For December from the climate forecast system. Precipitation Anomaly for California is wetter then normal: http://www.cpc.ncep.noaa.gov/products/people/mchen/CFSv2FCST/monthly/images/CFSv2.NaPrec.20121119.201212.gif T2 temperature is warmer than normal: http://www.cpc.ncep.noaa.gov/products/people/mchen/CFSv2FCST/monthly/images/CFSv2.NaT2m.20121119.201212.gif 700 Hpa Anomaly: http://www.cpc.ncep.noaa.gov/products/people/mchen/CFSv2FCST/monthly/images/CFSv2.z700.20121119.201212.gif Looks like a wet December with wet, mid latitude storms for the state. Atmospheric River?? ____________________________________________________________________________________________________________________________________ Yes...as expected it was wet wild
- [Periods of Snow Today above 8000 feet with the Snow Level lowering to 7000 Over night.....Snowshowers Sunday.....and possibly some Monday...](https://mammothweather.com/2012/11/17/periods-of-snow-today-above-8000-feet-with-the-snow-level-lowering-to-7000-overnight-snowshowers-sunday-and-possibly-some-monday/) - Reports from Mammoth Mt indicate storm totals so far about 8 to 10 inches at Main Lodge and about a foot above McCoy. Upper elevations should get another foot+ over the next 24 hours.... In that the snow level will remain about 7800 to 8000 through 4:00pm...only the upper elevations of Town will have amounts in
- [Models Wetter as Expected with Subtropical Airmass with over 2.00 inches liquid eq expected over the crest....Mammoth Mountain At Main Lodge up to 5 inches of Base Building Snow at 8.30 AM...](https://mammothweather.com/2012/11/16/models-wetter-as-expected-with-subtropical-airmass-with-over-2-00-inches-liquid-eq-expected-over-the-crest-mammoth-mountain-at-main-lodge-up-to-7-inches-of-base-building-snow-at-8-30-am/) - Ca Rivers Forecast Center-"Yosemite" QPF total between 4:00am Friday AM and Monday 4:00am = 2.26 inches of liquid Fri Fri Sat Sat Sat Sat Sun Sun Sun Sun Mon Mon : 12Z 18Z 00Z 06Z 12Z 18Z 00Z 06Z 12Z 18Z 00Z 06Z 12Z : --0.04/0.15/0.12/0.22/0.50/0.35/0.16/0.35/0.25/0.08/0.04/0.00 Yes...the Dweebs are not surprised that the new
- [WX Models Trending Wetter with System Friday into Weekend...Tropical/Subtropical Tap May Surprise A Few Folks.....](https://mammothweather.com/2012/11/12/wx-models-trending-wetter-with-system-friday-into-weekend-tropicalsubtropical-tap-may-surprise-a-few-folks/) - Another quick update: QPF from CRFC is about the same at 1.4 inches while the 00z Thursday GFS is a little wetter. ECMWF is holding its own at about 1.70 to 1.90 inches through Monday AM . Over all this is still a relatively warm storm for the high country of Mammoth. Snow levels about 7500 to 8000 feet.
- [Mammoth Mountain Creates its Own Weather in producing another 6 to 12 inches.....Storm Total 12 to 24 inches.....](https://mammothweather.com/2012/11/10/mammoth-mountain-creates-its-own-weather-in-producing-another-6-to-12-inches-storm-total-12-to-24-inches-and-more-on-the-way/) - Sunday Am Update: Fair and cold today with very light breezes...High in the 30s lows in the teens tonight. Next weather system splitting about mid week....only light amounts expected of a trace to a few inches. Better Storm toward Thanksgiving.... Stay Warm....................:-) Just a brief update Saturday......For a more detailed report read yesterdays discussion...
- [Mammoth Mountain Picked Up 6 to 12 Inches of Powder!!! More on the Way.....](https://mammothweather.com/2012/11/09/mammoth-mountain-picked-up-6-to-12-inches-of-powder-more-on-the-way/) - According to Cliff Man of Mammoth Mt Ski area.....6 inches of cold dry powder fell at the Main Lodge with up to 12 inches above McCoy Station......More light snowfall is expected today as winds continue to diminish.... WX Discussion: A Cold Upper Trof is currently over California with numerous showers associated with a Vort Center now climbing
- [Six Feet of Wind Arrives Thursday as Upper Jet Perpendicular to the Sierra combine with warm antecedent conditions at the surface for power gradient across Mono County Thursday PM....Expect close to 40 degrees of cooling by Saturday...](https://mammothweather.com/2012/11/07/six-feet-of-wind-arrives-thursday-as-upper-jet-perpendicular-to-the-sierra-combine-with-warm-antecedent-conditions-at-the-surface-for-power-gradient-across-mono-county-thursday-pm-expect-close-to-4/) - Quick Update Thursday Am: Not much has changed other then to slow the progress of the system down by 4 or 5 hours. I did notice again this AM that the westerly flow at 700MB is still shown to continue a bit longer than 24 hours ago allowing the possibly another one to two tenth's
- [One More Warm Day then Cold Blustery Storm to move into the Sierra Thursday PM.....](https://mammothweather.com/2012/11/05/one-more-warm-day-then-cold-blustry-storm-to-move-into-the-sierra-thursday-pm/) - 1:45pm Nov 6th ECMWF has a total of .8 over the crest through Sunday AM. So we do get up slope and the ratios are probably 13:1 to 15:1 Saturday/NGT. I guess the best part of all this documenting is that we will all find out at the end of this week, how the models handled
- [Warming Trend in Progress as a Strong Progressive Anti Cyclone Dominates California WX Through Tuesday.....Big changes on the Horizon During the 2nd Half of Next Week....](https://mammothweather.com/2012/11/04/warming-trend-in-progress-as-strong-progressive-anti-cyclone-dominates-california-wx-through-tuesday-big-changes-on-the-horizion-during-the-2nd-half-of-next-week/) - Models continue trend of yesterday with upper trof deepening more over Ca and not off shore. Quick look at the last nights EC QPF percip forecast shows about .5 to .6 over the crest between Thursday and Saturday. This is the upper limits for Dweebs criteria for Light amounts. Snow to Water ratios will be high

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- [NWS Lee Vining Forecast](https://mammothweather.com/latest-forecast/lee-vining/) - Here's the latest National Weather Service point forecast for the Lee Vining - Mono Lake area. Your browser does not support iframes.
- [NWS June Lake Forecast](https://mammothweather.com/latest-forecast/nws-june-lake-forecast/) - Here's the latest National Weather Service point forecast for June Lake. You can check current conditions on the June Mountain website. Your browser does not support iframes.
- [NWS Crowley Lake Forecast](https://mammothweather.com/latest-forecast/—-nws-crowley-lake-forecast/) - Here's the latest National Weather Service point forecast for the Crowley Lake community. Your browser does not support iframes.
- [NWS Mammoth Mtn. Forecast](https://mammothweather.com/latest-forecast/nws-mammoth-forecast-on-the-mountain/) - Here's the latest National Weather Service point forecast for the 9,870-foot level on Mammoth Mountain. Your browser does not support iframes.
- [NWS Mammoth Slopes Forecast](https://mammothweather.com/latest-forecast/nws-mammoth-slopes-forecast/) - Here's the latest National Weather Service point forecast for the 8,298-foot level (Forest Trail and Canyon Blvd. area) in Mammoth. Your browser does not support iframes.
- [NWS Mammoth Town Forecast](https://mammothweather.com/latest-forecast/nws-mammoth-lakes-forecast/) - Here's the latest National Weather Service point forecast for the 8,000-foot level (in town) in Mammoth. Your browser does not support iframes.
- [About Howard](https://mammothweather.com/about/about-howard/) - Local Weather Expert Howard began his weather interest as a young boy of 10 years with a thirst for weather answers that never waned. Along the way he befriended many in the know. The late Don Marcellin was a grass roots pioneer forecaster in the Owens Valley. Don was very inspirational in Howard's weather career,
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- [Howard's Favorites](https://mammothweather.com/howards-favorite-resources/) - Howard's years of local knowledge of Mammoth Lakes is a unique resource. Still, it takes an assembly of information to produce a successful forecast. Here is a selection of Howard's favorites. Howard's top ten maps and charts! Howard has a comprehensive list of his favorite forecasting and data resources!
- [Latest Forecast](https://mammothweather.com/latest-forecast/) - Here are the latest National Weather Service point forecasts for Mammoth and vicinity: Mammoth Town Forecast Mammoth Slopes Forecast Mammoth Mountain Forecast Crowley Lake Forecast June Lake Forecast Lee Vining Forecast Bishop Forecast Bridgeport Forecast
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## Categories

- [Mammoth Weather Outlook](https://mammothweather.com/category/mammoth-weather-outlook/)