Prognostic Meteorological Discussion
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FXUS01 KWBC 131959
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
258 PM EST WED DEC 13 2017

VALID 00Z THU DEC 14 2017 - 00Z SAT DEC 16 2017

...LINGERING FIRE WEATHER CONCERNS FOR SOUTHERN CALIFORNIA...

...COLD TO LINGER ACROSS THE NORTHEAST THROUGH THE REST OF THE
WEEK...

HIGH PRESSURE OVER PORTIONS OF THE WEST WILL HELP MAINTAIN WARM
AND DRY CONDITIONS; WHICH WILL PROLONG CRITICAL WILDFIRE
CONDITIONS FOR PORTIONS OF SOUTHERN CALIFORNIA. POOR AIR QUALITY
WILL PERSIST ACROSS MUCH OF THE PACIFIC NORTHWEST IN THIS PATTERN
AS WELL. RAIN, AN MOUNTAIN SNOW, WILL BEGIN TO MOVE INLAND
THURSDAY AFTERNOON AS AN UPPER-LEVEL TROUGH AND ASSOCIATED SURFACE
FRONT APPROACHES THE COAST... SPREADING TO THE NORTHERN ROCKIES BY
FRIDAY.

COLD, BREEZY CONDITIONS WERE OBSERVED FOR MOST OF THE NORTHEAST
AND MID-ATLANTIC REGION TODAY IN THE WAKE OF THE SYSTEM MOVING OUT
INTO THE ATLANTIC OCEAN. A CLIPPER SYSTEM PASSING THROUGH THE
GREAT LAKES REGION TODAY WILL BRING AREAL AVERAGES OF 3 TO 6
INCHES OF SNOW FROM LOWER MICHIGAN TO PENNSYLVANIA. A VAST MAJOR
OF THIS REGION HAS WINTER STORM WARNINGS AND WINTER WEATHER
ADVISORIES IN EFFECT. LAKE EFFECT SNOW SHOWERS WILL CONTINUE
DOWNWIND OF THE GREAT LAKE THROUGH FRIDAY BUT THERE WILL BE ENOUGH
SHIFTING OF THE WIND DIRECTION TO PREVENT MUCH IN THE WAY OF HEAVY
ACCUMULATIONS.

A WEAK SYSTEM WILL PUSH SOUTH THROUGH THE PLAINS BRINGING LIGHT
SNOW SHOWERS(OR A MIX OF RAIN AND SNOW)... WHILE ANOTHER COLD
FRONT SAGS SOUTHWARD INTO THE SOUTHERN PLAINS, MEXICO AND THE GULF
OF MEXICO OVER THE NEXT FEW DAYS. SOUTH TEXAS COULD SEE A DECENT
RAINFALL FRIDAY INTO SATURDAY AS THE COLD FRONT SLOWS ITS PACE.


CAMPBELL


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





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