BLOCKING PATTERN OVER THE CONUS IS BEGINNING TO PROGRESS EAST AS A SHORT WAVE OVER CENTRAL CANADA PICKS UP THE CUTOFF LOW, NOW OVER PA…..THEN LIFTS IT THROUGH NEW ENGLAND. THIS WILL ALLOW THE WAVE LENGTH, UP-STREAM TO OPEN UP AND ALLOW THE CENTRAL CA CUT OFF TO LIFT THROUGH THE SOUTH CENTRAL SIERRA EARLY THURSDAY AM. EXPECT A DAY TODAY SOMEWHAT SIMILAR TO YESTERDAY WITH SHOWERS AND THUNDER, WITH A SNOW LEVEL ABOUT 8K. ONCE THE UPPER LOW STARTS TO MOVE THIS AFTERNOON….UVM WILL INCREASE ALONG WITH PRECIPITATION IN THE SIERRA TONIGHT.
SNOWFALL WILL OCCUR IN TOWN LATER TODAY AND PICK UP TONIGHT WITH A FEW INCHES POSSIBLE. THE COLD POOL MOVES INTO AND THROUGH THE SIERRA THURSDAY AM. I WOULD NOT BE SURPRISED IF THE VILLAGE AT MAMMOTH PICKED UP 2 TO 3+ INCHES OF SNOW BY MID THURSDAY AM.

RIDGING MOVES INTO CALIFORNIA THURSDAY NIGHT AND INTO FRIDAY. A BLUE BIRD MORNING IS EXPECTED FRIDAY…THAT IS FOR THE BLUE BIRDS THAT ARE STILL IN TOWN. WARMER WEATHER IS EXPECTED FRIDAY THROUGH SUNDAY WITH HIGHS IN THE MID 60S BY SUNDAY.

PROGRESSIVE PATTERN CONTINUES INTO EARLY NEXT WEEK WITH A STRONG SHORT WAVE MOVING INTO THE PACIFIC NORTHWEST. AT THE MOMENT….THIS SYSTEM IS TRACKING WELL TO THE NORTH OF MAMMOTH. ACCORDING TO THE ECMWF ENSEMBLES THIS AM….500HT HEIGHT FALLS OF OVER 100DM ARE EXPECTED BY MONDAY PM, SO WE’LL GET SOME WIND AND ABOUT 5 TO 10 DEGREES OF COOLING BY TUESDAY. A SURFACE HIGH IN THE SYSTEMS WAKE TUESDAY AM WILL CHURN UP A NE GRADIENT OVER THE EASTERN SLOPES AND SIERRA CREST, SO ALTHOUGH 500 MB HEIGHTS RISE BACK ABOVE 582DM BY WEDNESDAY…THE WARMING MAY NOT BE SO QUICK THROUGH MID WEEK FOR MAMMOTH. HOWEVER…IT WILL CERTAINLY BE WARMER AT THE COAST! OVERALL…NEXT WEEK LOOKS DRY WITH SOMEWHAT ABOVE NORMAL TEMPS. CLIMO NOW FOR MAMMOTH IS 63 AND 31.

WESTERN HEMI:
THE MAIN KEY ANCHORING UPPER HEIGHT ANOMALY IS SOMEWHAT WEST OF THE DATELINE NEAR THE POSITIVE SSTA POOL, WITH THE LONG WAVE TROF NORTH OF HAWAII AND THE DOWNSTREAM UPPER HIGH ABOUT THE GREAT BASIN.

INDIAN SUMMER BEGINS THIS WEEKEND!