MESOSCALE DISCUSSION 0435
   NWS STORM PREDICTION CENTER NORMAN OK
   0342 PM CDT FRI APR 10 2009
   
   AREAS AFFECTED...ERN KY / NERN TN / SRN WV / WRN VA / NWRN NC
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 102042Z - 102145Z
   
   SEVERE THREAT WILL LIKELY CONTINUE E OF WW 133 INTO PARTS OF SRN WV
   WRN VA AND NWRN NC.  A WW MAY BE REQUIRED IN THE NEXT HR OR TWO.
   
   RADAR MOSAIC SHOWS EXPANSIVE MCS OVER PARTS OF ERN TN/KY.  DISCRETE
   SUPERCELLS HAVE DEVELOPED AHEAD OF LINE IN ERN KY AND POSE A
   HEIGHTENED RISK FOR TORNADO/S BEFORE AND DURING MERGER INTERACTION
   WITH MCS.  FURTHER S OVER THE CUMBERLAND GAP...STORMS ARE DEVELOPING
   IN A SEEMINGLY FAVORABLE THERMODYNAMIC ENVIRONMENT CHARACTERIZED BY
   MODERATE INSTABILITY /1000 J/KG SBCAPE/ DESPITE MARGINAL LOW LEVEL
   MOISTURE /DEWPOINTS IN THE LOWER 50S F/.  RECENTLY DEVELOPED
   CONVECTION INCLUDING A SUPERCELL OVER MITCHELL COUNTY NC WILL LIKELY
   POSE AN ISOLD LARGE HAIL/DMGG WIND THREAT...AS KINEMATIC FIELDS ARE
   MORE THAN ADEQUATE FOR UPDRAFT ROTATION.  CONVECTIVE TRENDS WILL BE
   MONITORED OVER THE NEXT HOUR OR TWO WITH A WW POSSIBLY BEING NEEDED
   DOWNSTREAM OF WW 133 PRIOR TO 22Z.
   
   ..SMITH.. 04/10/2009
   
   
   ATTN...WFO...RNK...RLX...GSP...MRX...JKL...
   
   LAT...LON   38008383 38368266 38358133 38138079 37588012 37048001
               36708023 35958119 35838207 36638356 37098390 38008383