MESOSCALE DISCUSSION 1919
   NWS STORM PREDICTION CENTER NORMAN OK
   0538 PM CDT FRI SEP 07 2012
   
   AREAS AFFECTED...ERN OH...NRN WV...WRN PA...WRN NY
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 629...
   
   VALID 072238Z - 080015Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 629
   CONTINUES.
   
   SUMMARY...ISOLATED HAIL THREAT MAY CONTINUE THE NEXT 1-2 HOURS
   ACROSS EASTERN PORTIONS OF WW 629 AND POINTS TO THE SOUTH AND EAST
   WHERE A FEW STORMS EXIST FROM SE OH INTO WRN NY. SEVERE THREAT IS
   EXPECTED TO REMAIN LIMITED AND CONVECTION SHOULD DECREASE INTO THE
   NIGHTTIME HOURS. THEREFORE A DOWNSTREAM SEVERE THUNDERSTORM WATCH IS
   NOT EXPECTED.
   
   DISCUSSION...ISOLATED SEVERE STORMS WILL CONTINUE THE NEXT 1-2 HOURS
   BUT OVERALL THREAT IS DIMINISHING. WHILE THE ENVIRONMENT IS
   CHARACTERIZED BY DEWPOINTS IN THE MID 60S TO NEAR 70 AND ADEQUATE
   BULK SHEAR...CLOUD COVER HAS LIMITED SFC HEATING...RESULTING IN ONLY
   MARGINAL INSTABILITY. THAT BEING SAID...COLD TEMPERATURES ALOFT AND
   SLIGHTLY VEERING VERTICAL WIND PROFILES MAY ALLOW FOR ISOLATED HAIL
   THREAT TO CONTINUE A WHILE LONGER AS STORMS BECOME MORE ELEVATED
   WITH LOSS OF DAYTIME HEATING. A NEW WW DOWNSTREAM TO THE SOUTH/EAST
   OF WW 629 IS NOT EXPECTED AT THIS TIME GIVEN THE LIMITED SEVERE
   THREAT AND EXPECTED DECREASE IN CONVECTION INTO THE NIGHTTIME HOURS.
   
   ..LEITMAN.. 09/07/2012
   
   
   ATTN...WFO...BGM...BUF...CTP...PBZ...RLX...CLE...ILN...
   
   LAT...LON   39298272 40778151 42327960 42737851 42907778 42777744
               42177731 40307789 39607928 39048151 38948237 39018276
               39298272