Prognostic Meteorological Discussion
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FXUS01 KWBC 080751
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
251 AM EST THU DEC 08 2016

VALID 12Z THU DEC 08 2016 - 12Z SAT DEC 10 2016

...HEAVY SNOW AND RAIN POSSIBLE OVER THE SIERRAS...

...HEAVY SNOW POSSIBLE IN FAVORED AREAS DOWNWIND FROM THE GREAT
LAKES...

...AREAS OF RAIN AND FREEZING RAIN POSSIBLE OVER INTERIOR PORTIONS
OF THE PACIFIC NORTHWEST...

...TEMPERATURES WILL BE 15 TO 35 DEGREES BELOW AVERAGE OVER THE
ROCKIES AND HIGH PLAINS...

A FRONT OFF THE WEST COAST WILL MOVE ONSHORE OVERNIGHT THURSDAY
MOVING INTO THE PACIFIC NORTHWEST, GREAT BASIN, AND CENTRAL
CALIFORNIA BY FRIDAY EVENING.  THE STORM WILL PRODUCE RAIN AND
HIGHER ELEVATION SNOW OVER NORTHERN/CENTRAL CALIFORNIA THAT WILL
EXPAND INTO PARTS OF THE GREAT BASIN AND THE PACIFIC NORTHWEST ON
THURSDAY.  OVERNIGHT THURSDAY, THE SNOW WILL EXPAND INTO PARTS OF
THE NORTHERN/CENTRAL ROCKIES INTO FRIDAY EVENING.  THE SNOW LEVELS
WILL RISE OVER CALIFORNIA OVERNIGHT THURSDAY AS WELL.  IN
ADDITION, THERE WILL BE POCKETS OF RAIN/FREEZING RAIN OVER SOME OF
THE INTERIOR PORTIONS OF THE PACIFIC NORTHWEST.

MEANWHILE, UPPER-LEVEL ENERGY AND FAVORABLE UPPER-LEVEL FLOW WILL
AID IN PRODUCING LAKE EFFECT SNOW DOWNWIND FROM THE GREAT LAKES
INTO PARTS OF NORTHERN NEW ENGLAND THROUGH FRIDAY EVENING.
ADDITIONALLY, UPPER-LEVEL ENERGY MOVING OVER THE WESTERN AND
CENTRAL GULF COAST STATES WILL AID IN PRODUCING RAIN OVER PARTS OF
THE SOUTHERN PLAINS AND THE LOWER MISSISSIPPI VALLEY THROUGH
FRIDAY MORNING.  RAIN AND EMBEDDED THUNDERSTORMS WILL ALSO DEVELOP
OVER THE SOUTHERN PORTION OF FLORIDA THROUGH FRIDAY EVENING.


ZIEGENFELDER


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP
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