MESOSCALE DISCUSSION 0721
   NWS STORM PREDICTION CENTER NORMAN OK
   1137 PM CDT TUE MAY 10 2011
   
   AREAS AFFECTED...OH...ERN KY...WRN WV
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 272...
   
   VALID 110437Z - 110530Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 272
   CONTINUES.
   
   ...NEW SEVERE THUNDERSTORM WATCH MAY BE REQUIRED ACROSS PORTIONS OF
   THE OH VALLEY...
   
   MOIST LOW LEVEL WARM ADVECTION HAS PROVEN EFFICIENT IN TSTM
   GENERATION ALONG ERN EDGE OF CAP ACROSS THE OH VALLEY.  THIS PROCESS
   WILL LIKELY CONTINUE WELL INTO THE PRE-DAWN HOURS AS WLY LOW LEVEL
   INFLOW PERSISTS INTO THE FRONT SIDE OF THE UPPER RIDGE AXIS.  LATEST
   RADAR DATA SUGGESTS AN EXPANDING ZONE OF CONVECTION ACROSS WRN/SRN
   OH WHICH COULD EASILY EVOLVE INTO ANOTHER SWD SURGING MCS BY 07-08Z.
   WILL MONITOR THIS REGION FOR POSSIBLE SEVERE THUNDERSTORM WATCH.
   
   ..DARROW.. 05/11/2011
   
   
   ATTN...WFO...RLX...CLE...JKL...ILN...IWX...
   
   LAT...LON   41138378 39638217 37418190 37198357 39598380 41288475
               41138378