Prognostic Meteorological Discussion
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000
FXUS01 KWBC 220824
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
323 AM EST MON DEC 22 2014

VALID 12Z MON DEC 22 2014 - 12Z WED DEC 24 2014

***DEVELOPING STORM SYSTEM ACROSS THE EASTERN U.S. THIS WEEK***

***PERIODS OF RAIN AND MOUNTAIN SNOW FOR THE NORTHWEST U.S.***

***SHOWERS AND THUNDERSTORMS FOR THE GULF COAST STATES***


THE UPPER LEVEL PATTERN FOR THE BEGINNING OF THE WEEK WILL FEATURE
A BUILDING RIDGE OVER THE SOUTHWEST U.S. AND A DEVELOPING TROUGH
OVER THE CENTRAL PLAINS AND MIDWEST STATES.  A WELL-DEFINED CLOSED
LOW IS EXPECTED TO FORM ACROSS THE MIDDLE MISSISSIPPI VALLEY BY
MONDAY EVENING.  THIS WILL BE THE FOCUS FOR UNSETTLED WEATHER OVER
THE NORTHERN PLAINS AND UPPER MIDWEST WHERE WINTRY PRECIPITATION
IS FORECAST, WITH SEVERAL INCHES OF SNOW FROM SOUTH DAKOTA
EASTWARD INTO MINNESOTA AND NORTHERN MICHIGAN.

GIVEN THE STRONG UPPER LEVEL TROUGH SETTING UP OVER THE CENTRAL
PART OF THE COUNTRY, A WELL DEFINED COLD FRONT WILL ADVANCE
EASTWARD IN TIME WITH SHOWERS AND STORMS DEVELOPING ALONG AND
AHEAD OF IT.  SOME OF THESE THUNDERSTORMS MAY BECOME STRONG TO
SEVERE ALONG THE CENTRAL/EASTERN GULF COASTS ON TUESDAY.  A FEW
RUMBLES OF THUNDER ARE ALSO POSSIBLE FROM TENNESSEE TO VIRGINIA AS
THE WARMER AIR LIFTS NORTHWARD.

OUT WEST, A BRIEF BREAK IN THE WEATHER IS EXPECTED FOR MONDAY
ACROSS THE PACIFIC NORTHWEST BEFORE ANOTHER SYSTEM BRINGS MORE
RAIN AND MOUNTAIN SNOW TO THE REGION ON TUESDAY.  SNOW SHOWERS ARE
ALSO IN THE FORECAST FOR THE CENTRAL AND NORTHERN ROCKIES AS THE
CURRENT STORM SYSTEM MOVES FARTHER EAST.

HAMRICK


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





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