MESOSCALE DISCUSSION 1576
   NWS STORM PREDICTION CENTER NORMAN OK
   1242 PM CDT MON JUL 11 2011
   
   AREAS AFFECTED...MUCH OF OH TO WV/WESTERN PA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 627...
   
   VALID 111742Z - 111915Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 627
   CONTINUES.
   
   SEVERE TSTM WATCH 627 CONTINUES UNTIL 21Z...WITH CONTINUED DAMAGING
   WINDS AND ISOLATED LARGE HAIL. AN ADDITIONAL WATCH MAY BE NEEDED BY
   AROUND MID-AFTERNOON FOR PORTIONS OF SOUTHEAST OH/WESTERN PA AND WV.
   
   A WELL-ORGANIZED SQUALL LINE CONTINUES TO SAG
   SOUTHEASTWARD/DECELERATE TO A DEGREE AS THE MAJORITY OF THE
   CONVECTIVE LINE BECOMES ORIENTED TO THE MEAN FLOW. WITH STRONG
   HEATING OCCURRING AMID CLOUD-FREE SKIES...A MOIST/INCREASINGLY
   UNSTABLE BOUNDARY LAYER AND INSTABILITY FEED FROM THE WEST
   /2000-4000 J PER KG MLCAPE/ WILL CONTINUE TO SUPPORT STRONG/SEVERE
   TSTM DEVELOPMENT ACROSS CENTRAL/NORTHEAST OH VIA UPLIFT FROM THE
   PROPAGATING COLD POOL. CURRENT THINKING IS THAT THE SEVERE THREAT
   WILL LIKELY DEVELOP SOUTHEASTWARD OUTSIDE OF SEVERE TSTM WATCH 627
   OVER THE NEXT SEVERAL HOURS...SUCH THAT AN ADDITIONAL SEVERE TSTM
   WATCH WILL LIKELY BE NEEDED FOR PORTIONS OF SOUTHEAST OH/WESTERN PA
   AND/OR WV.
   
   ..GUYER.. 07/11/2011
   
   
   ATTN...WFO...PBZ...RLX...CLE...ILN...IWX...IND...
   
   LAT...LON   40588504 40718418 40898323 42148207 42158085 40007957
               37828119 39918473 40588504