SWODY2
SPC AC 110519
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1119 PM CST WED DEC 10 2008
VALID 121200Z - 131200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
IN THE WAKE OF A DEEP SURFACE CYCLONE...LIFTING AWAY FROM NORTH
ATLANTIC COASTAL AREAS THROUGH THE CANADIAN MARITIMES...MODELS
INDICATE THAT AN UPSTREAM POLAR TROUGH WILL SHIFT EAST OF THE GREAT
LAKES/LOWER OHIO VALLEY FRIDAY...LIKELY REACHING NORTHERN AND MID
ATLANTIC COASTAL AREAS BY 12Z SATURDAY. AS THIS OCCURS... A LARGE
COLD SURFACE RIDGE WILL BEGIN TO RETREAT EAST OF THE MISSISSIPPI
VALLEY...AND A MODIFICATION/MOISTENING OF THE BOUNDARY LAYER OVER
THE WESTERN GULF OF MEXICO MAY COMMENCE. HOWEVER... EVEN WITH
SOUTHERLY FLOW STRENGTHENING EAST OF A DEEPENING SURFACE TROUGH TO
THE LEE OF THE ROCKIES...AS ANOTHER SIGNIFICANT UPPER TROUGH EVOLVES
OVER THE WESTERN STATES...A SUBSTANTIVE INLAND RETURN FLOW OF
MOISTURE IS NOT ANTICIPATED. THUS...WHILE A VIGOROUS...COLD SHORT
WAVE TROUGH DIGGING ACROSS THE PACIFIC NORTHWEST MAY SUPPORT LOW
PROBABILITIES FOR WEAK THUNDERSTORMS... CONVECTIVE POTENTIAL ACROSS
MUCH OF THE NATION APPEARS NEGLIGIBLE THROUGH THIS FORECAST PERIOD.
..KERR.. 12/11/2008
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