MESOSCALE DISCUSSION 0537
   NWS STORM PREDICTION CENTER NORMAN OK
   0256 PM CDT SAT APR 23 2011
   
   AREAS AFFECTED...SRN OH...NERN KY...WRN WV
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 231956Z - 232100Z
   
   BOWING MCS WILL POSE A THREAT FOR DAMAGING WINDS AND PERHAPS AN
   ISOLATED TORNADO AS IT MOVES E ACROSS PORTIONS OF SRN OH...NERN KY
   AND WRN WV. CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED FOR A
   POSSIBLE WW.
   
   BOW ECHO LOCATED OVER FAR SWRN OH/NRN KY AT 1945Z HAS RECENTLY
   ACCELERATED EWD /FORWARD PROPAGATION IN EXCESS OF 50 KT/...WHICH IS
   SUPPORTING A DAMAGING WIND THREAT INVOF THE OH RIVER. THOUGH
   DOWNSTREAM AIRMASS IS NOT PARTICULARLY UNSTABLE...SURFACE
   TEMPERATURES CONTINUE TO WARM INTO THE MID/UPPER 70S OVER MUCH OF
   ERN KY AND WV...WHICH WILL LIKELY AID IN STORM MAINTENANCE DURING
   THE NEXT FEW HOURS. IN ADDITION TO THE DAMAGING WIND THREAT...STRONG
   LOW-LEVEL VERTICAL WIND SHEAR /0-1 KM BULK SHEAR NEAR 40 KT/ WILL
   FAVOR MESOVORTEX FORMATION ALONG THE LEADING EDGE OF THE MCS...WHICH
   WOULD ENHANCE THE THREAT FOR DAMAGING WINDS AND PERHAPS AN ISOLATED
   TORNADO. GIVEN THE POTENTIAL FOR CONTINUED SVR WEATHER THREAT DURING
   THE AFTERNOON...A WW MAY BE NEEDED DURING THE NEXT HOUR.
   
   ..GARNER.. 04/23/2011
   
   
   ATTN...WFO...RLX...JKL...ILN...LMK...
   
   LAT...LON   38018208 37948424 38148477 38778440 39188365 39568178
               39158113 38438117 38018208