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 develops ahead of an approaching Trof Sunday. Little change in temperatures are expected through Saturday. 500MB height falls begin Sunday as a positive tilt Trof elongates SW Sunday with a split that spins up a closed low off the Central CA coast Sunday. 250MB upper jet forces moderate to strong winds over the upper elevations Sunday. Sunday will be a bit cooler than Saturday. Winds will further increase Sunday night and begin to work there way down into the lower elevations. Jet”O”Geneses  develops Sunday into Sunday night as some weak phasing with STJ. Thus subtropical moisture “Advects” into California Sunday Afternoon into Monday AM. A cold front moves through the Sierra Monday AM with wind, cooling and showers. As the upper Trof pushes through Tuesday evening, clearing is expected Tuesday night with flat ridging to follow Wednesday into Thursday next week. (Fair Weather).


Longer Range: There is less certainty with the storm for the end of next week.  Weather systems are appearing to slow down now and become more cut off.  It may be that the end of next week’s storm is pushed back to mid month as our wet season winds down and another drought year is becoming more inevitable with each passing week.

April 1st water content for the Southern and Sentral sierra will show 51% to 55% of normal, although Mammoth Pass added substantially to that with the moderate AR, late last January.

The storm early next week may drop up to a foot of snow over the crest by Tuesday evening if everything works out just right!!


Dr Howard and the Dweebs…………………..:-)


It was a beautiful day in California Sunday. Temperatures were above normal, (50s) and it really felt like Spring! The upper ridge aloft will give way to a system tracking through the Pacific Northwest tonight and into the Northern Rockies Monday. The Upper Trof will bring wind and cooling for the Mammoth Area Tonight through Tuesday. Tuesday look to be the coolest day with highs in the mid 40s with lows in the upper teens and 20s Wednesday AM.  By Wednesday afternoon, ridging is back and it builds through Friday, Highs will reach the upper 50 to low 60s, Thursday into Friday.  By Friday night, winds increase as a Trough deepens down the coast . This may bring precipitation back into our area as early as Saturday night or Easter Sunday. It is just too far out for any certainty. By week-two as the MJO heads into phase 7, the odds increase for a significant unsettled pattern change, the week following Easter Sunday.


Dr Howard and the Dweebs…………………….:-)