MESOSCALE DISCUSSION 2046
   NWS STORM PREDICTION CENTER NORMAN OK
   0723 PM CDT MON SEP 28 2009
   
   AREAS AFFECTED...NERN NC THROUGH SERN VA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 749...
   
   VALID 290023Z - 290200Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 749
   CONTINUES.
   
   THREAT FOR ISOLATED DAMAGING WIND AND LARGE HAIL WILL PERSIST UNTIL
   JUST PRIOR TO 02Z AS STORMS CONTINUE THROUGH NERN NC AND SERN VA.
   SRN END OF THE LINE COULD POSE A SEVERE WEATHER THREAT FOR A ROW OF
   COUNTIES JUST SOUTH OF WW 749 INCLUDING MARTIN AND WASHINGTON...BUT
   THREAT AREA IS TOO SMALL FOR AN ANOTHER WW ISSUANCE.
   
   LINE OF STORMS FROM EXTREME SERN VA THROUGH NERN NC IS MOVING EAST
   AT AROUND 45 KT. STORMS ARE EMBEDDED WITHIN STRONG 50+ KT VERTICAL
   SHEAR SUPPORTIVE OF EMBEDDED SUPERCELLS AND BOWING STRUCTURES. THE
   STORMS ARE CURRENTLY MOVING THROUGH A THETA-E RIDGE WITH 500 J/KG
   MLCAPE. HOWEVER...THE THERMODYNAMIC ENVIRONMENT WILL BECOME
   INCREASINGLY MARGINAL AS ACTIVITY CONTINUES EAST INTO A STABILIZING
   BOUNDARY LAYER BEFORE MOVING OFFSHORE.
   
   ..DIAL.. 09/29/2009
   
   
   ATTN...WFO...AKQ...MHX...RAH...
   
   LAT...LON   36197560 35757672 35577788 35887771 36357690 37037568
               36197560