SWODY1
SPC AC 300558
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1258 AM CDT TUE OCT 30 2007
VALID 301200Z - 311200Z
..NO SVR TSTM AREAS FORECAST...
..FLORIDA...
TROPICAL STORM NOEL IS FORECAST BY NHC TO MOVE NWWD TOWARD THE SERN
COAST OF FL TODAY AND TONIGHT. AS THE STORM APPROACHES...
THUNDERSTORM ACTIVITY WILL BECOME INCREASINGLY POSSIBLE ACROSS THE
EAST COAST OF FL LATE THIS AFTERNOON INTO THE OVERNIGHT PERIOD.
FORECAST SOUNDINGS LATE THIS AFTERNOON IN THE MIAMI AREA SHOW 20 TO
25 KT OF 0-1 KM SHEAR WITH A GRADUAL INCREASE OF THE LOW-LEVEL SHEAR
TO ABOUT 35 KT BY MIDNIGHT. ALTHOUGH INSTABILITY IS FORECAST TO
REMAIN RELATIVELY WEAK...THE SHEAR SHOULD BE SUFFICIENT FOR ROTATING
STORMS DURING THE OVERNIGHT PERIOD. A MARGINAL TORNADO THREAT MAY
EXIST ESPECIALLY LATE IN THE PERIOD MAINLY FROM THE MIAMI AREA NWD
TO MELBOURNE.
..GREAT BASIN...
AN UPPER-LEVEL TROUGH OVER THE INTERMOUNTAIN WEST IS FORECAST TO
DEAMPLIFY AND MOVE INTO THE FOUR CORNERS REGION BY THIS EVENING.
LARGE-SCALE ASCENT...COLD AIR ALOFT AND SFC HEATING SHOULD RESULT IN
SCATTERED THUNDERSTORM DEVELOPMENT ACROSS THE REGION.
.BROYLES/JEWELL.. 10/30/2007
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