FXUS01 KWBC 060820
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
320 AM EST TUE JAN 06 2009

VALID 12Z TUE JAN 06 2009 - 00Z THU JAN 08 2009

A SIGNIFICANT STORM WILL OCCUR OVER ROUGHLY THE EASTERN THIRD OF
THE COUNTRY ON TUESDAY AND WEDNESDAY.  A FRONT EXTENDING FROM THE
CAROLINAS WESTWARD TO THE TENNESSEE VALLEY THEN SOUTHWESTWARD TO
THE CENTRAL GULF COAST WILL HAVE A WAVE OF LOW PRESSURE DEVELOP
OVER THE TENNESSEE VALLEY.  THIS LOW PRESSURE CENTER WILL MOVE
NORTHWARD TO THE LOWER GREAT LAKES BY WEDNESDAY MORNING AND THEN
EASTWARD INTO THE NORTHEAST.  THE ASSOCIATED COLD FRONT WILL BE
MOVING EASTWARD ON WEDNESDAY FROM THE APPALACHIANS TO OFF THE EAST
COAST BY WEDNESDAY EVENING.

MOISTURE WILL MOVE NORTHWARD WITH THE WAVE INTO A REGION OF COLD
AIR DAMMING ALONG THE NORTHERN AND CENTRAL APPALACHIANS.
CONDITIONS WILL BE RIPE FOR A REGION OF FREEZING RAIN AND SLEET TO
DEVELOP OVER PARTS OF THE MID-ATLANTIC WESTWARD INTO THE OHIO
VALLEY AND PARTS OF THE NORTHEAST THROUGH WEDNESDAY AFTERNOON.  IN
ADDITION ... SOME FREEZING RAIN AND SLEET WILL DEVELOP OVER PARTS
OF THE MIDDLE MISSISSIPPI VALLEY ON TUESDAY MORNING.  SNOW WILL
ALSO DEVELOP NORTH OF THE SLEET/FREEZING RAIN OVER PARTS OF THE
OHIO VALLEY/GREAT LAKES AND INTO THE NORTHEAST.  RAIN WILL MAINLY
DEVELOP ALONG THE FRONT FROM THE MID-ATLANTIC TO THE WESTERN GULF
COAST WITH SHOWERS AND THUNDERSTORMS OVER THE CENTRAL AND PARTS OF
THE EASTERN GULF COAST ON TUESDAY.  ON THE BACKSIDE OF THE SYSTEM
... SNOW WILL DEVELOP OVER THE UPPER GREAT LAKES AND OVER THE
CENTRAL APPALACHIANS BY WEDNESDAY EVENING.

MEANWHILE ... ONSHORE FLOW AND LATER AN APPROACHING STORM WILL
BRING LIGHT TO MODERATE RAIN AND HIGHER ELEVATION SNOW TO THE
PACIFIC NORTHWEST THROUGH WEDNESDAY.  FARTHER INLAND OVER THE
NORTHERN INTERMOUNTAIN REGION EASTWARD TO THE NORTHERN HIGH PLAINS
SNOW AND LOWER ELEVATION RAIN WILL DEVELOP OVER THE REGION ALSO
THROUGH WEDNESDAY.

ZIEGENFELDER



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