MESOSCALE DISCUSSION 0712
   NWS STORM PREDICTION CENTER NORMAN OK
   0332 PM CDT TUE MAY 10 2011
   
   AREAS AFFECTED...IND THROUGH CNTRL AND NERN KY...SWRN OH...WRN WV
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 268...270...
   
   VALID 102032Z - 102200Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   268...270...CONTINUES.
   
   SEVERE STORMS WITH VERY LARGE HAIL AND DAMAGING WIND WILL REMAIN
   LIKELY NEXT FEW HOURS MAINLY OVER ERN PARTS OF WW 268 AND 270 FROM
   NERN IND...SWRN OH...ERN KY AND SWRN WV. ADDITIONAL DEVELOPMENT
   FARTHER W IN IND AND CNTRL KY REMAINS UNCERTAIN.
   
   NUMEROUS STORMS INCLUDING A FEW SUPERCELLS CONTINUE IN VICINITY OF
   NW-SE ORIENTED QUASISTATIONARY FRONT AND ALONG ERN PERIPHERY OF
   STRONGER EML/CAP FROM NERN IND THROUGH SWRN OH INTO ERN KY. STORMS
   HAVE BECOME ROOTED IN THE BOUNDARY LAYER WHERE THE ATMOSPHERE IS
   STRONGLY UNSTABLE /2000-3000 J/KG MLCAPE/ AND 40 KT NWLY EFFECTIVE
   SHEAR SUPPORTIVE OF SUPERCELLS AND STORM SPLITS WITH VERY LARGE HAIL
   LIKELY. SOME OF THE ACTIVITY MAY EVENTUALLY EVOLVE INTO
   CLUSTERS/BOWS AS THEY MOVE SEWD WITH AN INCREASING THREAT FOR
   DAMAGING WIND. DEVELOPMENT FARTHER W THROUGH CNTRL KY AND IND IS
   MORE UNCERTAIN DUE TO WARMER TEMPERATURES ALOFT ALONG BASE OF EML
   AND PROXIMITY TO UPPER RIDGE AXIS.
   
   ADDITIONAL THUNDERSTORM DEVELOPMENT ACROSS NRN IND IS ALSO UNCERTAIN
   BUT POSSIBLE...ESPECIALLY IN ASSOCIATION WITH NWRN MOVING OUTFLOW
   BOUNDARY. THIS REGION IS VERY UNSTABLE...AND IF SURFACE BASED STORMS
   DEVELOP THEY WILL RAPIDLY BECOME SEVERE.
   
   ..DIAL.. 05/10/2011
   
   
   ATTN...WFO...RLX...JKL...ILN...LMK...IWX...IND...
   
   LAT...LON   41138462 39848282 38438156 37458210 37268305 38648433
               40798593 41138462