Prognostic Meteorological Discussion
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FXUS01 KWBC 050816
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
316 AM EST MON DEC 05 2016

VALID 12Z MON DEC 05 2016 - 12Z WED DEC 07 2016

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE CENTRAL GULF COAST AND SOUTHEAST...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE CENTRAL GULF COAST/LOWER
MISSISSIPPI VALLEY TO THE SOUTHEAST...

...HEAVY SNOW POSSIBLE OVER PARTS OF THE NORTHERN PLAINS/UPPER
MISSISSIPPI VALLEY...

...SNOW POSSIBLE OVER THE CASCADES AND CENTRAL ROCKIES...

A FRONT EXTENDING FROM THE NORTHERN PLAINS TO THE GREAT BASIN WILL
MOVE EAST AND SOUTHWARD TO GREAT LAKES/OHIO VALLEY TO THE CENTRAL
GULF COAST AND BANKED UP AGAINST THE SOUTHERN ROCKIES BY TUESDAY
EVENING.  THE SYSTEM WILL PRODUCE SNOW OVER PARTS OF THE
NORTHERN/CENTRAL ROCKIES/GREAT BASIN TO THE NORTHERN PLAINS,
ENDING OVER THE NORTHERN HIGH PLAIN/CENTRAL ROCKIES OVERNIGHT
MONDAY.  THE SNOW WILL MOVE INTO PARTS OF THE UPPER/MIDDLE
MISSISSIPPI VALLEY AND UPPER GREAT LAKES BY MONDAY EVENING INTO
TUESDAY EVENING.  THE SNOW WILL BE HEAVY OVER PARTS OF THE
NORTHERN PLAINS/UPPER MISSISSIPPI VALLEY.

BEHIND THE SYSTEM, ONSHORE FLOW OFF THE PACIFIC WILL AID IN
PRODUCING RAIN AND HIGHER ELEVATION SNOW THROUGH TUESDAY MORNING.
THE SNOW LEVELS WILL LOWER SUBSTANTIALLY BY MONDAY, WITH A MIX OF
RAIN AND SNOW POSSIBLE EVEN AT THE LOWER ELEVATIONS AROUND PUGET
SOUND.  ADDITIONAL UPPER-LEVEL ENERGY WILL MOVE OVER THE NORTHWEST
COAST OVERNIGHT MONDAY AIDING IN THE DEVELOPMENT OF RAIN AND
HIGHER ELEVATION SNOW OVER PARTS OF THE PACIFIC NORTHWEST INTO
NORTHERN CALIFORNIA BY TUESDAY MORNING WITH SNOW EXPANDING INTO
PARTS OF THE NORTHERN/CENTRAL ROCKIES AND GREAT BASIN BY TUESDAY
EVENING.

MEANWHILE, ANOTHER FRONT OVER THE GULF COAST WILL LIFT NORTHWARD
INTO THE TENNESSEE VALLEY/SOUTHEAST BY TUESDAY MORNING AND MOVE
OFF THE SOUTHEAST COAST BY TUESDAY EVENING.  MOISTURE FROM THE
GULF OF MEXICO WILL OVERRUN THE BOUNDARY AND POOL ALONG THE FRONT
AIDING IN THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS OVER THE
WESTERN GULF COAST TO PARTS OF THE SOUTHEAST THAT WILL END OVER
THE WESTERN GULF COAST BY TUESDAY MORNING.  THE SHOWERS AND
THUNDERSTORMS WILL BE CONFINED TO THE FLORIDA PENINSULA BY TUESDAY
EVENING.  RAIN WILL ALSO DEVELOP OVER PARTS OF THE SOUTHERN PLAINS
INTO PARTS OF THE CAROLINAS THAT WILL LIKEWISE END OVER THE
SOUTHERN PLAINS BY TUESDAY MORNING.  THE RAIN WILL LIFT INTO PARTS
OF THE MIDDLE MISSISSIPPI VALLEY EASTWARD INTO THE SOUTHERN
MID-ATLANTIC OVERNIGHT MONDAY.  BY TUESDAY EVENING THE RAIN WILL
MOVE INTO THE OHIO VALLEY/LOWER GREAT LAKES AND PARTS OF THE
NORTHERN MID-ATLANTIC.  SOME SNOW MAY DEVELOP OVER THE HIGHER
ELEVATIONS OF THE CENTRAL APPALACHIANS AND NORTHERN MID-ATLANTIC.

ELSEWHERE, UPPER-LEVEL ENERGY OVER THE GREAT LAKES TO THE
NORTHEAST WILL MOVE EASTWARD OVER EASTERN CANADA AND OFF THE
NORTHEAST COAST BY TUESDAY AFTERNOON.  THE ENERGY WILL AID IN
PRODUCING SNOW AND RAIN OVER PARTS OF THE GREAT LAKES/NORTHEAST
INTO THE MID-ATLANTIC ON MONDAY MORNING CONFINED TO NORTHERN NEW
ENGLAND BY MONDAY EVENING AND ENDING BY TUESDAY MORNING.


ZIEGENFELDER


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