Prognostic Meteorological Discussion
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000
FXUS01 KWBC 271953
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
253 PM EST SAT DEC 27 2014

VALID 00Z SUN DEC 28 2014 - 00Z TUE DEC 30 2014

...HEAVY RAIN POSSIBLE FOR PARTS OF THE TENNESSEE VALLEY/CENTRAL
GULF COAST AND PARTS OF THE SOUTHEAST...

...SNOW FOR PARTS OF THE NORTHERN/CENTRAL ROCKIES AND THE
CASCADES...

A FRONT EXTENDING FROM THE GREAT LAKES SOUTHWARD TO THE LOWER
MISSISSIPPI VALLEY WILL MOVE OFF THE NORTHEAST COAST WHILE A WAVE
OF LOW PRESSURE WILL DEVELOP OVER THE CENTRAL GULF COAST ALLOWING
THE BOUNDARY TO LINGER OVER THE SOUTHEAST/CENTRAL GULF COAST.
MOISTURE POOLING ALONG THE FRONT WILL PRODUCE RAIN FROM THE GREAT
LAKES TO THE TENNESSEE VALLEY THAT WILL MOVE EASTWARD TO THE
NORTHEAST TO THE TENNESSEE VALLEY BY SUNDAY MORNING.  AN AREA OF
LIGHT TO MODERATE RAIN WILL EXTEND FROM PARTS OF THE TENNESSEE
VALLEY TO THE EASTERN OHIO VALLEY ON SUNDAY MORNING, TOO.  THE
RAIN WILL MOVE OFF THE NORTHEAST COAST BY SUNDAY EVENING WHILE AN
AREA OF LIGHT TO MODERATE RAIN WILL DEVELOP OVER PARTS OF THE
MID-ATLANTIC ON MONDAY MORNING.  SHOWERS AND THUNDERSTORMS WITH
MODERATE RAIN WILL DEVELOP OVER PARTS OF THE LOWER MISSISSIPPI
VALLEY/CENTRAL GULF COAST ON SATURDAY EVENING AND WILL LINGER OVER
PARTS OF THE CENTRAL/EASTERN GULF COAST THROUGH MONDAY.

UPPER-LEVEL ENERGY OVER THE PACIFIC NORTHWEST WILL SINK
SOUTHEASTWARD TO THE CENTRAL ROCKIES/CENTRAL PLAINS BY MONDAY.
LIGHT SNOW WILL DEVELOP OVER PARTS OF THE NORTHERN INTERMOUNTAIN
REGION/NORTHERN ROCKIES WILL EXPAND INTO THE CENTRAL ROCKIES BY
SUNDAY AND INTO CENTRAL PLAINS SUNDAY EVENING INTO MONDAY.  IN
ADDITION, ONSHORE FLOW OVER THE PACIFIC NORTHWEST WILL AID IN
PRODUCING COASTAL RAIN AND HIGHER ELEVATION SNOW OVER THE CASCADES
THROUGH MONDAY.  ADDITIONALLY, COLD HIGH PRESSURE OVER WESTERN
CANADA WILL USHER COLD AIR INTO THE NORTHERN TIER STATES BY SUNDAY
EVENING INTO MONDAY.


ZIEGENFELDER


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