MESOSCALE DISCUSSION 1213
   NWS STORM PREDICTION CENTER NORMAN OK
   0354 PM CDT THU JUN 18 2009
   
   AREAS AFFECTED...NRN GA...EXTREME WRN NC AND SC
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 461...
   
   VALID 182054Z - 182200Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 461
   CONTINUES.
   
   IT IS SOMEWHAT UNCERTAIN WHETHER A NEW WATCH WILL BE NECESSARY
   BEFORE THE EXPIRATION OF WW 461 OCCURS AT 22Z. RADAR IMAGERY SHOWS
   THAT FORWARD PROPAGATING MCS HAS WEAKENED SUBSTANTIALLY OVER THE
   APPALACHIAN MOUNTAINS...BUT DISCRETE THUNDERSTORM ACTIVITY HAS
   DEVELOPED FROM NRN GA INTO WRN SC. THESE STORMS ARE OCCURRING WITHIN
   AN ENVIRONMENT CHARACTERIZED BY VERY LARGE INSTABILITY /MLCAPE AOA
   3000 J PER KG/ AND MODERATE DEEP LAYER NWLY VERTICAL WIND SHEAR.
   THUS...ORGANIZED MULTICELLS POSING A LARGE HAIL/DAMAGING WIND THREAT
   ARE POSSIBLE. IF STORM INTENSITY AND COVERAGE INCREASE DURING THE
   NEXT HOUR...A NEW WW MAY BE NECESSARY.
   
   ..GARNER.. 06/18/2009
   
   
   ATTN...WFO...CAE...GSP...MRX...FFC...BMX...HUN...
   
   LAT...LON   35218591 35208405 35668312 33458208 33458505 35218591