Prognostic Meteorological Discussion
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000
FXUS01 KWBC 241946
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
246 PM EST WED DEC 24 2014

VALID 00Z THU DEC 25 2014 - 00Z SAT DEC 27 2014

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE SOUTHEAST...

...SNOW FOR PARTS OF THE NORTHERN/CENTRAL ROCKIES AND GREAT
BASIN...

STORM OVER PARTS OF THE GREAT LAKES WILL LIFT NORTHWARD INTO
CANADA BY CHRISTMAS, THURSDAY MORNING.  THE ASSOCIATED FRONT WILL
MOVER OFF THE EAST COAST ALSO ON CHRISTMAS MORNING.   THE SYSTEM
WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHEAST
THROUGH LATE WEDNESDAY EVENING.  MODERATE TO HEAVY RAIN WILL
DEVELOP OVER PARTS OF THE UPPER GREAT LAKES AND THE NORTHEAST THAT
WILL MOVE NORTHWARD INTO CANADA ON THURSDAY, CHRISTMAS.  LIGHT
SNOW WILL DEVELOP OVER PARTS OF THE UPPER GREAT LAKES AND MOVE
INTO PARTS OF THE OHIO VALLEY BEFORE ENDING OVER PARTS OF THE
NORTHERN APPALACHIANS BY AFTERNOON ON CHRISTMAS.

MEANWHILE, ANOTHER STORM OVER THE NORTHERN ROCKIES WILL MOVE
EASTWARD TO THE MIDDLE MISSOURI VALLEY/UPPER GREAT LAKES BY FRIDAY
MORNING.  THE SYSTEM WILL PRODUCE MODERATE SNOW OVER PARTS OF THE
GREAT BASIN/NORTHERN ROCKIES/NORTHERN HIGH PLAINS ON WEDNESDAY
EVENING THAT WILL MOVE INTO CENTRAL ROCKIES/GREAT BASIN BY
CHRISTMAS MORNING, THURSDAY.  THE AREA OF MODERATE SNOW WILL WANE
TO A BROKEN AREA OF LIGHT SNOW OVER PARTS OF THE CENTRAL ROCKIES
BY CHRISTMAS EVENING.  IN ADDITION, LIGHT SNOW WILL MOVE ONTO THE
NORTHERN PLAINS INTO PARTS OF THE UPPER MISSISSIPPI VALLEY BY
CHRISTMAS EVENING.  THE LIGHT SNOW WILL EXTEND INTO PARTS OF THE
UPPER GREAT LAKES TO THE CENTRAL PLAINS/CENTRAL ROCKIES BY FRIDAY
MORNING.  LOWER ELEVATION RAIN AND HIGHER ELEVATION SNOW WILL
DEVELOP OVER PARTS OF CALIFORNIA ON WEDNESDAY EVENING ENDING LATE
WEDNESDAY NIGHT.  RAIN WILL ALSO DEVELOP OVER PARTS OF THE
SOUTHERN ROCKIES/SOUTHERN HIGH PLAINS AND SNOW OVER HIGHER
ELEVATIONS BY FRIDAY MORNING.  ADDITIONALLY, WEAK ONSHORE FLOW
WILL AID IN PRODUCING LIGHT RAIN AND HIGHER ELEVATION SNOW OVER
PARTS OF THE PACIFIC NORTHWEST THROUGH FRIDAY.  SNOW WILL DEVELOP
OVER PARTS OF THE NORTHERN INTERMOUNTAIN REGION/NORTHERN ROCKIES
BY FRIDAY MORNING.


ZIEGENFELDER


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