MESOSCALE DISCUSSION 1821
   NWS STORM PREDICTION CENTER NORMAN OK
   0239 PM CDT MON AUG 01 2011
   
   AREAS AFFECTED...NRN/CNTRL OH
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 710...
   
   VALID 011939Z - 012045Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 710
   CONTINUES.
   
   STORM CLUSTERS...INCLUDING ISOLATED SUPERCELLS...ARE EXPECTED TO
   MAINTAIN INTENSITY DURING THE NEXT FEW HRS WITHIN AN ENVIRONMENT
   CHARACTERIZED BY MODERATE TO STRONG INSTABILITY AND 30-40 KT DEEP
   LAYER NWLY SHEAR. PRIMARY SVR WEATHER THREATS WILL CONTINUE TO BE
   LARGE HAIL AND DAMAGING WINDS. HOWEVER...RELATIVELY LONGER-LIVED
   SUPERCELL MOVING THROUGH WYANDOT COUNTY AT 1930Z MAY BE CAPABLE OF
   PRODUCE A TORNADO DURING THE NEXT HR. AS THUNDERSTORMS MOVE SEWD
   ACROSS CNTRL OH AND EXIT INTO SRN OH THEY WILL ENCOUNTER WEAKER
   INSTABILITY AND MORE SUBSIDENT LARGE-SCALE REGIME /ADJACENT TO
   SURFACE HIGH PRESSURE CENTERED OVER THE LWR-MID OH VALLEY REGION/.
   AS THIS TAKES PLACE...STORMS MAY WEAKEN AND REDUCE THE SVR WEATHER
   THREAT...WHICH IS SUPPORTED BY LATEST 17Z HRRR.
   
   ..GARNER.. 08/01/2011
   
   
   ATTN...WFO...PBZ...RLX...CLE...ILN...DTX...IWX...IND...
   
   LAT...LON   41688480 41728342 41958311 41858308 41708271 41678241
               42208125 42308055 40018049 39458121 39368271 39688450
               40318483 41688480