MESOSCALE DISCUSSION 0563
   NWS STORM PREDICTION CENTER NORMAN OK
   0146 PM CDT SAT APR 25 2009
   
   AREAS AFFECTED...WRN NC/VA
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 251846Z - 251945Z
   
   ISOLD PULSE THUNDERSTORMS CAPABLE OF MARGINALLY SVR HAIL/WIND WILL
   CONTINUE TO DEVELOP THROUGH THE AFTERNOON. 
   
   VISIBLE SATELLITE IMAGERY REFLECTS A LINE OF CU DEVELOPING ALONG THE
   BLUE RIDGE MOUNTAINS OF VA/NC...SWWD INTO HIGHER TERRAIN OF NRN GA.
   FORCED CONVERGENCE/UPSLOPE ALONG THE LEE OF THE MOUNTAINS AROUND THE
   PERIPHERY OF A SFC HIGH TO THE E HAVE PROVIDED FAVORABLE
   LIFT...ALLOWING INITIATION OF CONVECTION DESPITE UNFAVORABLE RIDGING
   ALOFT. STRONG SURFACE HEATING...MODEST DEW POINTS...AND STEEP LAPSE
   RATES WILL CONTINUE TO SUPPORT DEVELOPMENT IN A MARGINALLY UNSTABLE
   ENVIRONMENT AS CINH WEAKENS. GIVEN THE CLOSE PROXIMITY OF THE UPPER
   RIDGE...WIND FIELD WILL REMAIN LIGHT...CONDUCIVE MAINLY TO
   BRIEF-LIVED PULSE STORMS CAPABLE OF MARGINALLY SVR HAIL...GIVEN A
   SUSTAINED UPDRAFT. AS STORMS COLLAPSE...RELATIVELY DRY LOW LEVELS
   MAY ENHANCE DOWNDRAFT WINDS IN EVAPORATIONAL COOLING. GIVEN
   ISOLD/MARGINAL NATURE...A WW IS NOT ANTICIPATED AT THIS TIME.
   
   ..HURLBUT.. 04/25/2009
   
   
   ATTN...WFO...LWX...RNK...RLX...GSP...MRX...
   
   LAT...LON   35748227 35028305 35008421 35488416 35968324 36958138
               39157890 38687849 38127891 36708033 35748227