Prognostic Meteorological Discussion
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000
FXUS01 KWBC 251943
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
243 PM EST THU DEC 25 2014

VALID 00Z FRI DEC 26 2014 - 00Z SUN DEC 28 2014

...COLD AND SNOW EXPECTED FROM CENTRAL ROCKIES TO THE UPPER
MIDWEST...

...HEAVY RAINS POSSIBLE ALONG THE CENTRAL GULF COAST...

A COLD FRONT DROPPING OUT OF THE GREAT BASIN THURSDAY NIGHT WILL
DROP TEMPERATURES AND SPREAD AN AXIS OF SNOW FROM THE CENTRAL
ROCKIES TO THE UPPER MIDWEST.  A LIMITED MOISTURE SUPPLY SHOULD
GENERALLY KEEP SNOW ACCUMULATIONS ON THE LIGHTER SIDE;
HOWEVER...UPSLOPE FLOW WILL BOOST TOTALS OVER THE TERRAIN OF
COLORADO AND WYOMING.  AMOUNTS WILL ALSO BE ENHANCED TO THE
NORTHWEST OF A WEAK SURFACE WAVE TRACKING NORTHEASTWARD ALONG THE
BOUNDARY.  AS THE FRONT BEGINS TO PUSH THROUGH THE CENTRAL AND
SOUTHERN PLAINS FRIDAY AFTERNOON...MOISTURE BEING PULLED NORTHWARD
OUT OF THE GULF WILL FUEL INCREASING AMOUNTS OF SHOWERS AND
THUNDERSTORMS ACROSS THE LOWER TO MIDDLE MISSISSIPPI VALLEY.
ORGANIZED AREAS OF HEAVY RAIN...AND THE POTENTIAL FOR FLASH
FLOODING...WILL BE POSSIBLE ALONG THE CENTRAL GULF COAST.


THE COLD FRONT THAT BROUGHT DREARY WEATHER TO MUCH OF THE EASTERN
U.S. CHRISTMAS EVE WILL CONTINUE TO PUSH OUT INTO THE ATLANTIC
THURSDAY NIGHT.  EVEN LINGERING LAKE EFFECT SHOWERS WILL COME TO
AN END ON FRIDAY...LEAVING BEHIND A MILD AND DRY COUPLE OF DAYS UP
AND DOWN THE EASTERN SEABOARD.  THE ONLY EXCEPTION WILL BE OVER
THE SOUTHERN TIP OF FLORIDA...WHERE THE COLD FRONT IS EXPECTED TO
STALL OUT AND CAUSE CONTINUED SHOWER ACTIVITY INTO THE WEEKEND.

LATE IN THE FORECAST PERIOD...A PACIFIC SYSTEM DROPPING DOWN
THROUGH BRITISH COLUMBIA AND INTO THE NORTHWEST WILL BRING HEAVIER
RAINS...AND MOUNTAIN SNOWS...TO THE PACIFIC NORTHWEST AND NORTHERN
ROCKIES BY EARLY SATURDAY.


GERHARDT


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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