MESOSCALE DISCUSSION 0580
   NWS STORM PREDICTION CENTER NORMAN OK
   1249 PM CDT FRI MAY 07 2004
   
   AREAS AFFECTED...SERN OH...WV...WRN MD...SWRN PA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 155...
   
   VALID 071749Z - 071915Z
   
   AN MCS OVER OH WILL MOVE SEWD INTO WW 155 AND A THREAT FOR HAIL AND
   DAMAGING WINDS WILL CONTINUE THROUGH THE AFTERNOON HOURS.
   
   ELEVATED CONVECTION IS CURRENTLY ONGOING ACROSS OH NORTH OF A SFC
   BOUNDARY LOCATED ACROSS SRN OH. THE MCS IS LOCATED AHEAD OF A
   SHORTWAVE TROUGH ASSOCIATED WITH STRONG ASCENT. THIS COMBINED WITH
   STRONG LOW-LEVEL CONVERGENCE ALONG THE SFC BOUNDARY WILL SUPPORT THE
   CONVECTION AS IT TRACKS ESEWD INTO AN INCREASINGLY UNSTABLE AIRMASS.
   OBJECTIVE ANALYSIS SHOWS A DEVELOPING MID-LEVEL JET OVER IND AND OH
   WITH UNIDIRECTIONAL FLOW AND ABOUT 40 KT AT 500 MB...RESULTING IN A
   SWIFT STORM MOVEMENT FAVORABLE FOR DAMAGING WINDS. THE DAMAGING WIND
   POTENTIAL WILL ALSO BE ENHANCED AS SFC HEATING STEEPENS THE
   LOW-LEVEL LAPSE RATES AND THE STORMS MOVE CLOSER TO THE SFC
   BOUNDARY...BECOMING MORE SFC-BASED. A HAIL THREAT WILL ALSO BE
   PRESENT CONSIDERING THE SPEED SHEAR IN PLACE AND MODERATELY STEEP
   LAPSE RATES.
   
   ..BROYLES.. 05/07/2004
   
   
   ATTN...WFO...CTP...LWX...PBZ...RLX...ILN...
   
   39888253 40278212 40497801 39757732 38837771 38668173
   38558239