SWODY1
SPC AC 171248
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0648 AM CST SAT JAN 17 2009
VALID 171300Z - 181200Z
...NO TSTM AREAS FORECAST...
...SYNOPSIS...
STRONG SHORTWAVE TROUGH DIGGING SEWD ACROSS THE NRN MS RIVER VALLEY
TODAY WILL REINFORCE LONGWAVE TROUGH OVER THE ERN CONUS...AND
INHIBIT THUNDERSTORM POTENTIAL ACROSS THE CONUS FOR MUCH OF THE DAY.
AHEAD OF STRONG MID/UPPER LEVEL JET AND ASSOCIATED SFC COLD
FRONT...WSWLY LOW LEVEL FLOW WILL INCREASE OVER THE WRN GULF OF
MEXICO AND LOWER MS RIVER VALLEY OVERNIGHT. RESULTANT INCREASING
ASCENT AND LOW LEVEL THETA-E ADVECTION WILL SUPPORT DEVELOPMENT OF
SHALLOW MOIST CONVECTION FROM PORTIONS OF THE UPPER TX COAST INTO
THE LOWER MS RIVER VALLEY...MAINLY AFTER 06Z. HOWEVER...FORECAST
SOUNDINGS INDICATE FAVORABLE THERMODYNAMICS FOR DEEP MOIST
CONVECTION/THUNDERSTORMS WILL LIKELY REMAIN AWAY FROM THE COAST
THROUGH 12Z.
..EVANS.. 01/17/2009
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