Prognostic Meteorological Discussion
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FXUS01 KWBC 060856
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
356 AM EST TUE DEC 06 2016

VALID 12Z TUE DEC 06 2016 - 12Z THU DEC 08 2016

...SEVERE THUNDERSTORMS POSSIBLE FOR PORTIONS OF THE SOUTHEAST...

...HEAVY SNOW POSSIBLE FOR PORTIONS OF THE NORTHERN PLAINS AND
UPPER MISSISSIPPI VALLEY...

...RAIN/FREEZING RAIN POSSIBLE OVER PARTS OF THE CENTRAL
APPALACHIANS...

...TEMPERATURES WILL BE 15 TO 35 DEGREES BELOW AVERAGE OVER THE
NORTHERN HIGH PLAINS...

LOW PRESSURE OVER THE TENNESSEE VALLEY WILL MOVE NORTHEASTWARD OFF
THE MID-ATLANTIC COAST BY WEDNESDAY MORNING.  THE SYSTEM WILL
PRODUCE SHOWERS AND THUNDERSTORMS OVER PARTS OF THE
SOUTHEAST/TENNESSEE VALLEY THAT WILL MOVE OFF THE SOUTHEAST COAST
BY TUESDAY EVENING.  RAIN WILL ALSO DEVELOP OVER PARTS OF THE
LOWER MISSISSIPPI VALLEY/TENNESSEE VALLEY/OHIO VALLEY AND PARTS OF
THE SOUTHERN MID-ATLANTIC THAT WILL LIFT NORTHEASTWARD INTO THE
PARTS OF THE NORTHERN MID-ATLANTIC/LOWER GREAT LAKES BY TUESDAY
EVENING AND OFF MOST OF THE NORTHEAST COAST BY WEDNESDAY
AFTERNOON.  AN AREA OF RAIN/FREEZING RAIN WILL DEVELOP OVER PARTS
OF THE CENTRAL APPALACHIANS ON TUESDAY AFTERNOON INTO EVENING.
SNOW WILL ALSO DEVELOP OVER THE HIGHER ELEVATIONS OF THE NORTHERN
APPALACHIANS INTO PENNSYLVANIA STARTING TUESDAY EVENING THAT WILL
WIND DOWN OVER PARTS OF NORTHERN NEW ENGLAND BY WEDNESDAY
AFTERNOON INTO EVENING.

MEANWHILE, A SECOND FRONT EXTENDING FROM THE UPPER GREAT LAKES TO
THE MIDDLE/LOWER MISSISSIPPI VALLEY INTO THE SOUTHERN PLAINS AND
BANK UP AGAINST THE SOUTHERN/CENTRAL ROCKIES WILL MOVE EASTWARD TO
THE NORTHEAST COAST ACROSS PARTS OF THE SOUTHERN
MID-ATLANTIC/SOUTHEAST AND THE GULF COAST STATES BY WEDNESDAY
EVENING.  THE STORM WILL PRODUCE SNOW OVER PARTS OF THE NORTHERN
PLAINS TO THE UPPER GREAT LAKES/MIDDLE MISSISSIPPI VALLEY THAT
WILL MOVE INTO MANITOBA/ONTARIO AND QUEBEC BY WEDNESDAY AFTERNOON.
 AS THE PRECIPITATION MOVES NORTHEASTWARD INTO CANADA, AREAS OF
RAIN AND SNOW WILL DEVELOP OVER PORTIONS OF MICHIGAN TUESDAY
EVENING INTO WEDNESDAY MORNING.  SNOW WILL ALSO LINGER OVER PARTS
OF THE NORTHERN PLAINS INTO THE UPPER GREAT LAKES OVERNIGHT
TUESDAY INTO WEDNESDAY EVENING.

ADDITIONALLY, UPPER-LEVEL ENERGY OVER THE PACIFIC NORTHWEST WILL
MOVE SOUTHEASTWARD TO THE CENTRAL PLAINS BY WEDNESDAY EVENING INTO
THURSDAY.  THE ENERGY WILL PRODUCE COASTAL RAIN AND SNOW OVER THE
PACIFIC NORTHWEST, EVEN OVER THE LOWER ELEVATIONS OF WASHINGTON
STATE, THROUGH LATE TUESDAY NIGHT.  RAIN AND SNOW WILL DEVELOP
OVER PARTS OF NORTHERN CALIFORNIA ENDING BY TUESDAY EVENING.  SNOW
WILL DEVELOP OVER PARTS OF THE NORTHERN/CENTRAL ROCKIES AND GREAT
BASIN MOVING INTO THE CENTRAL PLAINS OVERNIGHT TUESDAY INTO
WEDNESDAY.  THE SNOW WILL END OVER THE NORTHERN ROCKIES/GREAT
BASIN BY WEDNESDAY MORNING, WEST TO EAST.  IN ADDITION, RAIN WILL
DEVELOP OVER PARTS OF THE SOUTHERN PLAINS BY WEDNESDAY EVENING.

ANOTHER SYSTEM WILL BE APPROACHING THE WEST COAST WEDNESDAY INTO
THURSDAY.  ONSHORE FLOW WILL RETURN TO CALIFORNIA ON WEDNESDAY
AFTERNOON INTO EVENING PRODUCING RAIN AND HIGHER ELEVATIONS OVER
PARTS OF NORTHERN/CENTRAL CALIFORNIA BY WEDNESDAY EVENING.


ZIEGENFELDER


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