MESOSCALE DISCUSSION 0576
   NWS STORM PREDICTION CENTER NORMAN OK
   0929 AM CDT FRI MAY 07 2004
   
   AREAS AFFECTED...ERN OH/SRN PA/WV/NRN VA/MD/DE
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 071429Z - 071600Z
   
   A WIND DAMAGE AND HAIL THREAT WILL EXIST ACROSS SRN PA AS A
   CONVECTIVE CLUSTER MOVES ESEWD OVER THE NEXT FEW HOURS. THE SEVERE
   THREAT WILL LIKELY INCREASE AND A NEW WW WILL BE ISSUED SHORTLY.
   
   A CLUSTER OF STORMS IS CURRENTLY ONGOING ALONG AND JUST TO THE NORTH
   OF A COLD FRONT ORIENTED ENE TO WSW ACROSS NRN PA. THE CONVECTION
   SHOULD BECOME MORE SFC-BASED AS IT MOVES TOWARD THE BETTER
   INSTABILITY LOCATED ACROSS SRN PA. STEEP 0-3 KM LOW-LEVEL LAPSE
   RATES OF 6.5 C EXIST DUE TO SFC HEATING AND THIS SHOULD INCREASE
   OVER THE NEXT FEW HOURS. AS THE CONVECTION MOVES QUICKLY ESEWD AT 45
   TO 50 KT...WIND DAMAGE WILL BE LIKELY. AN ISOLATED HAIL THREAT WILL
   ALSO EXIST WITH THE STRONGER STORMS.
   
   ..BROYLES.. 05/07/2004
   
   
   ATTN...WFO...PHI...AKQ...CTP...LWX...PBZ...RLX...CLE...ILN...
   
   40468227 40688154 40777990 40667837 40337651 40157576
   39727537 39327551 38587574 38307699 38527901 38918208
   39438248