SWODY1
SPC AC 111225
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0725 AM CDT SAT SEP 11 2010
VALID 111300Z - 121200Z
...NO SVR TSTM AREAS FORECAST...
...LOWER OH VALLEY INTO CENTRAL TX...
AN UPPER TROUGH CURRENTLY OVER THE UPPER MS VALLEY WILL MOVE
EASTWARD INTO THE GREAT LAKES REGION TODAY...WHILE UPPER RIDGING IN
MAINTAINED OVER THE SOUTHERN STATES. SCATTERED SHOWERS AND
THUNDERSTORMS ARE ONGOING THIS MORNING IN A PRE-FRONTAL BAND FROM
THE LOWER OH VALLEY INTO AR/SERN OK. THIS ACTIVITY WILL LIKELY
PERSIST THROUGH THE MORNING...WITH THE POTENTIAL FOR RE-DEVELOPMENT
OF ISOLATED THUNDERSTORMS OVER THIS SAME CORRIDOR LATER THIS
AFTERNOON. HOWEVER...LOW LEVEL WINDS ARE FORECAST TO WEAKEN AND
VEER TO WESTERLY THROUGH THE DAY. THIS WILL LESSEN CONVERGENCE IN
VICINITY OF THE FRONT AND DIMINISH DEEP LAYER VERTICAL SHEAR.
CLOUDS FROM ONGOING CONVECTION AND WEAK MID LEVEL LAPSE RATES WILL
FURTHER DECREASE THE SEVERE THREAT TODAY. WILL MAINTAIN AN AXIS OF
LOW SEVERE PROBABILITIES FOR RISK OF PULSE STORMS CAPABLE OF
LOCALIZED DAMAGING WINDS...BUT RISK APPEARS VERY MARGINAL AND MAY BE
REMOVED IN LATER OUTLOOKS.
..HART/STOPPKOTTE.. 09/11/2010
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