Prognostic Meteorological Discussion
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FXUS01 KWBC 040801
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 AM EST SUN DEC 04 2016

VALID 12Z SUN DEC 04 2016 - 12Z TUE DEC 06 2016

...HEAVY RAIN POSSIBLE FROM THE WESTERN GULF COAST TO PORTIONS OF
THE SOUTHEAST AND SOUTHERN APPALACHIANS...

...HEAVY SNOW POSSIBLE OVER PARTS OF THE CASCADES...

A FRONT OVER THE NORTHWEST WILL MOVE EASTWARD TO THE UPPER
MISSISSIPPI VALLEY/CENTRAL PLAINS AND SOUTHWARD TO THE GREAT BASIN
AND CENTRAL ROCKIES BY MONDAY EVENING.  THE SYSTEM WILL PRODUCE
RAIN AND HIGHER ELEVATION SNOW OVER THE PACIFIC NORTHWEST AND SNOW
OVER THE NORTHERN INTERMOUNTAIN REGION/NORTHERN ROCKIES WITH THE
SNOW MOVING TO THE NORTHERN PLAINS/CENTRAL ROCKIES BY MONDAY
AFTERNOON AND INTO PARTS OF THE UPPER MISSISSIPPI VALLEY/UPPER
GREAT LAKES BY MONDAY EVENING.  ONSHORE FLOW WILL AID IN KEEPING
RAIN AND HIGHER ELEVATION SNOW OVER THE PACIFIC NORTHWEST THROUGH
TUESDAY.

MEANWHILE, UPPER-LEVEL ENERGY OVER THE NORTHERN/CENTRAL PLAINS
WILL MOVE EASTWARD TO THE GREAT LAKES OVERNIGHT SUNDAY AND INTO
PARTS OF SOUTHEASTERN CANADA AND THE NORTHEAST BY MONDAY EVENING.
THE ENERGY WILL AID IN PRODUCING SNOW OVER PARTS OF THE
UPPER/MIDDLE MISSISSIPPI VALLEY AND UPPER GREAT LAKES THAT WILL
MOVE EASTWARD TO NORTHERN NEW ENGLAND BY MONDAY EVENING.  RAIN
WILL ALSO DEVELOP OVER PARTS OF THE CENTRAL PLAINS/MIDDLE
MISSISSIPPI VALLEY AND THE SOUTHWESTERN PORTION OF THE OHIO VALLEY
THAT WILL MOVE INTO PARTS OF THE MID-ATLANTIC BY MONDAY MORNING
AND OFF THE MID-ATLANTIC COAST BY MONDAY EVENING WHILE LINGERING
OVER PARTS OF SOUTHERN NEW ENGLAND.

IN ADDITION, AN UPPER-LEVEL LOW OVER NORTHWESTERN MEXICO WILL
SLOWLY MOVE EASTWARD TO EASTERN TEXAS BY MONDAY EVENING.
CIRCULATION AROUND THE UPPER LOW WILL STREAM MOISTURE INTO THE
WESTERN GULF COAST AND EASTWARD INTO THE EASTERN GULF
COAST/SOUTHEAST ON SUNDAY.  THE MOISTURE WILL CONTINUE TO FLOW
NORTHWARD OUT OF THE GULF OF MEXICO OVERRUNNING THE ASSOCIATED
FRONT THROUGH MONDAY NIGHT.  SHOWERS AND THUNDERSTORMS WILL
DEVELOP OVER PARTS OF THE WESTERN GULF COAST INTO PARTS OF THE
EASTERN/CENTRAL GULF COAST


ZIEGENFELDER


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