DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 030729
SWODY3
SPC AC 030728

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0228 AM CDT MON SEP 03 2012

VALID 051200Z - 061200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PORTIONS OF THE
MIDWEST/OH VALLEY/GREAT LAKES REGION...

...SYNOPSIS...
FAST CYCLONIC FLOW ALOFT WILL PERSIST ACROSS MOST OF THE NRN CONUS
THIS PERIOD...ON SRN FRINGES OF A LARGE CENTRAL CANADA TROUGH.
SEVERAL WEAK VORTICITY MAXIMA ARE EMBEDDED WITHIN THIS FLOW --
INCLUDING ONE PROGGED TO BE MOVING QUICKLY ACROSS THE MIDWEST REGION
IN CONJUNCTION WITH A SURFACE COLD FRONT. THIS SYSTEM WILL SUPPORT
AN AREA OF CONVECTION AND ASSOCIATED SEVERE POTENTIAL --
PARTICULARLY DURING THE AFTERNOON AND EARLY EVENING HOURS.

...MIDWEST/GREAT LAKES/OH VALLEY AREA...
SHOWERS AND STORMS -- POSSIBLY ONGOING OVER WRN PORTIONS OF THE
REGION EARLY -- SHOULD CONTINUE/INCREASE INTO THE AFTERNOON...AS
PRE-FRONTAL HEATING OF THE BOUNDARY LAYER RESULTS IN MODERATE
DESTABILIZATION. WITH MODERATELY STRONG WNWLY FLOW ALOFT
PERPENDICULAR TO THE FRONT...POTENTIAL FOR LOCALLY DAMAGING WINDS IS
APPARENT -- WITH AT LEAST A BROKEN/SEMI-ORGANIZED LINE APPEARING
FAIRLY LIKELY ATTM BY MID TO LATE AFTERNOON. THUS...WILL INTRODUCE
SLIGHT RISK ACROSS THIS AREA...TO COVER THE WIND THREAT AS WELL AS
HAIL POTENTIAL.

..GOSS.. 09/03/2012

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