MESOSCALE DISCUSSION 0737
   NWS STORM PREDICTION CENTER NORMAN OK
   0629 PM CDT WED MAY 06 2009
   
   AREAS AFFECTED...SOUTHERN/EASTERN VA AND WESTERN/CENTRAL/NORTHERN NC
   INTO UPSTATE SC
   
   CONCERNING...TORNADO WATCH 256...
   
   VALID 062329Z - 070100Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 256 CONTINUES.
   
   TORNADO WATCH 256 CONTINUES UNTIL 01Z ACROSS SOUTHERN/EASTERN VA AND
   WESTERN/CENTRAL/NORTHERN NC INTO UPSTATE SC...WITH A CONTINUED
   ISOLATED TORNADO RISK IN ADDITION TO SEVERE HAIL/DAMAGING WINDS.
   CURRENT INDICATIONS ARE THAT AN ADDITIONAL/REPLACEMENT TORNADO WATCH
   MAY BE NEEDED ESPECIALLY FOR PORTIONS OF VA/NC PRIOR TO 01Z.
   
   LATEST SURFACE ANALYSIS FEATURES SLOW NORTHWARD-MOVING ROUGHLY
   WEST-EAST FRONTAL BOUNDARY ACROSS SOUTHERN VA...WITH A WARM/UNSTABLE
   BOUNDARY LAYER IN PLACE ACROSS UPSTATE PORTIONS OF SC/NC INTO SOUTH
   CENTRAL/SOUTHEAST VA EARLY THIS EVENING. WITHIN THIS
   REGIME...ISOLATED TO SCATTERED SUPERCELLS SHOULD REMAIN COMMON OVER
   THE NEXT FEW HOURS ESPECIALLY FROM THE NC PIEDMONT INTO
   SOUTHERN/SOUTHEAST VA. AMPLE DEEP LAYER SHEAR AND SUFFICIENT 0-1 KM
   SRH REFLECTED IN REGIONAL WSR-88D VWPS...WITH ADDITIONAL
   STRENGTHENING IN THE LOWEST 1-2 KM ANTICIPATED THROUGH MID
   EVENING...WILL MAINTAIN A SUPERCELL AND ISOLATED TORNADO/SEVERE HAIL
   RISK ACROSS NC INTO SOUTHERN/EASTERN VA. WITH THIS THREAT
   POTENTIALLY EXTENDING BEYOND THE SCHEDULED 01Z EXPIRATION OF WW
   256...AN ADDITIONAL WATCH OR LOCAL EXTENSION COULD BE NEEDED PRIOR
   TO 01Z.
   
   ..GUYER.. 05/06/2009
   
   
   ATTN...WFO...AKQ...MHX...RAH...ILM...RNK...CAE...GSP...
   
   LAT...LON   36617970 37697786 37897611 36107619 34787983 34168221
               34928224 36128057 36617970