SHOWERS AND THUNDER TODAY INTO WEDNESDAY…BUT FOCUSED MORE OVER NORTHERN MONO TODAY….

STORM TOTALS:

8:15AM STORM TOTALS AT 8200 JUST WEST OF THE VILLAGE AT MAMMOTH

.18 SINCE 12:00AM
.51 24 HOUR TOTAL
.97 STORM TOTAL
1.00 SINCE OCTOBER 1ST

DISCUSSION: 8:30AM TUESDAY

A NORTH SOUTH ELONGATED UPPER CUT OFF LOW OVER THE SOUTHERN SAN JOAQUIN VALLEY IS CURRENTLY ROTATING A PRETTY STRONG VORT CENTER CLEARLY SEEN ON THE WAVE LOOP OVER THE MAMMOTH AREA. THE MAIN LIFT WITH THIS VORT CENTER IS TO THE NORTH OVER NORTHERN MONO COUNTY WHERE SHOWERS AND THUNDER STORMS ARE OCCURRING. SO AT THIS TIME, MOST OF IT WILL EXIST ON A LINE TODAY FROM NORTHERN MONO COUNTY SOUTH TO PT CONCEPTION. NEVERTHELESS SHOWERS AND THUNDER IS STILL POSSIBLE, ALTHOUGH A LESSER CHANCE THEN THE NORTH.

AGAIN….

THE WAY THE NORTH/NORTHEAST FLOW IS OCCURRING. THE EXACT LOCATION AND SHAPE OF THE UPPER LOW WILL DETERMINE WHERE THE BEST LIFT AND PRECIP WITH BE. AT THIS POINT, IT APPEARS TO BE NORTH OF THE MAMMOTH AREA, MORE OVER FROM BRIDGEPORT TO THE ALPINE COUNTY BORDER. SHOWERS AND THUNDER MAY OCCUR ANYWHERE TODAY IN THE MONO COUNTY AREA BUT THE NORTH IS FAVORED. SNOW WILL FALL ABOVE 8000 FEET TODAY WITH IT STICKING ABOVE 8K TO 8.5K. THEN….AS THE COLD CORE LIFTS NORTH EAST OVER OUR AREA WEDNESDAY/NIGHT, THE SNOW LEVEL WILL LOWER A BIT TO 7500 FOR A BETTER CHANCE OF A DUSTING FOR THE TOWN OF MAMMOTH.

CRFC 24HR QPF FOR THE AREA NEAR YOSEMITE IS ABOUT 3/4 OF AN INCH OF H20 EQ THROUGH 12Z WEDNESDAY AM. THEN ANOTHER .6 INCHES THROUGH FRIDAY AM. WE WILL PROBABLY GET AN EXTRA SHOT WHEN THE UPPER CENTER STARTS TO MOVE TO THE NORTH EAST INTO THE SIERRA ITSELF WEDNESDAY NIGHT/THURSDAY MORNING.

BY FRIDAY…ALL MODELS AGREE THAT THE UPPER CUT OFF WILL BE NORTH EAST OF THE MAMMOTH AREA AS THE CURRENT BLOCKING PATTERN BREAKS DOWN AND THE UPPER CUTOFF OVER THE OHIO VALLEY SHIFT EAST THEN LIFTS NORTHEAST INTO THE NEW ENGLAND AREA BY THURSDAY AM. THERE AFTER…THE UPPER RIDGE OVER THE MIDWEST COLLAPSES AND REDEVELOPS OVER THE FAR WEST…….HENCE AN INDIAN SUMMER WEEKEND FOR THE EASTERN SIERRA WITH HIGHS IN THE 60S!

LONG RANGE:

AT THE MOMENT…..THE LONG WAVE RIDGE SEEMS TO BE FIXED OVER THE DATELINE AND LW TROF ABOUT 140W…WITH NEXT POSITIVE ANOMALY ABOUT 130W. A PRETTY STRONG UPPER JET WILL DRIVE ACROSS THE NORTHERN TIER STATES EARLY NEXT WEEK THEN SHIFT FURTHER TO THE NORTH AS THE EASTERN PAC POSITIVE ANOMALY IS FORECASTED TO SHIFT MORE OVER CA TOWARD THE END OF NEXT WEEK. INITIALLY, THE RIDGE EFFECTING CA IS NOT A STRONG ONE AND MAY END UP BEING A BIT ON THE DIRTY SIDE. 6 TO 10 DAY HEIGHTS ARE ABOUT 580 OVER MAMMOTH AND SO TEMPS WILL BE SLIGHTLY ABOVE SEASONAL…..SAY IN THE LOW TO MID 60S. THE 8 TO 14 DAY HAS THE LONG WAVE MORE OF CA AND SO 500HT MEANS MAY IN FACT OFFER BETTER WEATHER FOR THE FAR WEST WITH THE STORM TRACK EVER FURTHER TO THE NORTH TOWARD THE END NEXT WEEK. THE LATTER PART OF THIS LONG RANGE FORECAST IS DEFINITELY SUBJECT TO CHANGE AS THERE IS A STRENGTHENING MJO CURRENTLY DEVELOPING OVER THE EASTERN INDIAN OCEAN THAT “MAY” CHANGE OUR PATTERN DURING WEEK 2.

MJO:

THE GEFS ENSEMBLE IS CONTINUING TO FORECAST A STRENGTHENING MJO PROPAGATING INTO THE WESTERN PACIFIC THE NEXT WEEK. THE ENSEMBLE SPREAD IS VERY LOW ON THIS, LEADING TO GOOD CONFIDENCE IN ITS FORECAST. THE FORECAST INCLUDES INCREASED TROPICAL RAINFALL OVER THE WESTERN PACIFIC WHICH OFTEN TIMES WILL MODULATE THE WESTERLIES TO THE NORTH.

STAY TUNED TO THE POSSIBILITY OF AMPLIFICATION IN THE WESTERLIES NEXT WEEK. THE DWEEBS WILL BE WATCHING TO SEE IF THERE ARE SIGNIFICANT CHANGES IN THE GFS FANTASY CHARTS EITHER LATER THIS WEEK OR NEXT.

WHAT I WOULD EXPECT IS THE POSSIBILITY OF THE STRENGTHENING OF THE WESTERLIES, FOLLOWED BY A BIG JUMP IN THE AMPLIFICATION OF THE EASTERN PACIFIC HIGH, FOLLOWING BY THE POSSIBILITY OF UNDER CUTTING OF THE WESTERLIES AT SOME POINT. STAY TUNED…….

DR HOWARD AND THE DWEEBS………………..:-)