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Mesoscale Discussion 653
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   MESOSCALE DISCUSSION 0653
   NWS STORM PREDICTION CENTER NORMAN OK
   0122 AM CDT THU APR 28 2011
   
   AREAS AFFECTED...EXTREME SERN AL...WRN FL PANHANDLE AND SWRN GA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 280622Z - 280745Z
   
   TRENDS ARE BEING MONITORED FOR A POSSIBLE WW FROM EXTREME SERN
   AL...SWRN GA INTO THE WRN FL PANHANDLE. 
   
   STORMS ARE DEVELOPING ALONG A PRE-FRONTAL CONFLUENCE BAND FROM THE
   WRN FL PANHANDLE INTO SERN AL. ACTIVITY MAY EVENTUALLY SPREAD INTO
   SWRN GA. ATMOSPHERE REMAINS MODERATELY UNSTABLE EAST OF DEVELOPING
   STORMS WITH 40 KT EFFECTIVE SHEAR. HOWEVER...0-2 KM HODOGRAPHS ARE
   RELATIVELY STRAIGHT WITH MODEST STORM RELATIVE HELICITY. TENDENCY
   WILL BE FOR LOW LEVEL FLOW TO VEER AND WEAKEN WITH TIME AS PRIMARY
   LLJ LIFTS NWD THROUGH THE MID ATLANTIC REGION IN RESPONSE TO VORT
   MAX EJECTING THROUGH THE OH VALLEY. THIS COULD SERVE AS A LIMITING
   FACTOR FOR A SUSTAINED TORNADO THREAT. NEVERTHELESS...AT LEAST A
   MODEST THREAT WILL EXIST FOR STRONG WIND GUSTS AND AN ISOLATED
   TORNADO OR TWO WITHIN THE NEXT COUPLE HOURS.
   
   ..DIAL.. 04/28/2011
   
   
   ATTN...WFO...TAE...BMX...MOB...
   
   LAT...LON   30768630 31438596 31888498 31638434 30958459 30568610
               30768630 
   
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Page last modified: April 28, 2011
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