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Mesoscale Discussion 645
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   MESOSCALE DISCUSSION 0645
   NWS STORM PREDICTION CENTER NORMAN OK
   0912 PM CDT WED APR 27 2011
   
   AREAS AFFECTED...CNTRL/SWRN VA...NWRN NC...SERN WV
   
   CONCERNING...TORNADO WATCH 240...
   
   VALID 280212Z - 280315Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 240 CONTINUES.
   
   RECENT RADAR/SATELLITE TRENDS INDICATE SEVERE THREAT HAS BECOME
   INCREASINGLY LOCALIZED ACROSS CNTRL VA...WITH A LONE SUPERCELL NOW
   IN CULPEPER COUNTY. HOWEVER...LONG-TRACK SUPERCELLS ARE APPROACHING
   THE WRN EXTENT OF WW 240 ACROSS SWRN VA/NWRN NC/SERN WV. SURFACE DEW
   POINTS CONTINUE TO INCREASE ACROSS THIS REGION JUST AHEAD OF THESE
   CELLS. MODIFIED 00Z RNK RAOB SUGGESTS MODEST SURFACE-BASED
   INSTABILITY WOULD REMAIN IN PLACE WITHIN A VERY STRONGLY SHEAR
   ENVIRONMENT...CONDUCIVE TO ALL FORMS OF SEVERE WEATHER THROUGH THE
   OVERNIGHT.
   
   ..GRAMS.. 04/28/2011
   
   
   ATTN...WFO...AKQ...LWX...RAH...RNK...RLX...GSP...MRX...
   
   LAT...LON   38018078 38228006 38397906 39027795 39197728 38857698
               38297705 37507735 37187775 37047850 36307979 36058037
               36068139 36128181 36668171 37498121 38018078 
   
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Page last modified: April 28, 2011
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