MESOSCALE DISCUSSION 1572
   NWS STORM PREDICTION CENTER NORMAN OK
   1137 AM CDT TUE JUL 24 2007
   
   AREAS AFFECTED...SE OH...SW PA...WV...ERN KY...WRN VA...ERN TN
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 241637Z - 241800Z
   
   AN ISOLATED LARGE HAIL THREAT SHOULD DEVELOP IN THE CNTRL
   APPALACHIAN MTNS EARLY THIS AFTERNOON. THE SEVERE THREAT SHOULD
   REMAIN MARGINAL AND A WEATHER WATCH IS NOT ANTICIPATED ACROSS THE
   REGION.
   
   LATEST SFC ANALYSIS SHOWS A WEAK INVERTED SFC TROUGH OVER WRN TN
   EXTENDING NEWD INTO WCNTRL KY. A MOIST AXIS IS LOCATED EAST OF THE
   SFC TROUGH WITH LOWER TO MID 60S F DEWPOINTS AS FAR NORTHEAST AS
   PARKERSBURG WV. MODERATE INSTABILITY HAS DEVELOPED ALONG THE MOIST
   AXIS SHOWN BY OBJECTIVE ANALYSIS AND FURTHER DESTABILIZATION SHOULD
   OCCUR OVER THE NEXT FEW HOURS. IN RESPONSE...THUNDERSTORMS SHOULD
   INITIATE ALONG THE INSTABILITY AXIS WITH STORM COVERAGE INCREASING
   THIS AFTERNOON. ACROSS THE MCD AREA...TEMPS ARE COLD ALOFT
   ASSOCIATED WITH AN UPPER-LOW CENTERED OVER FAR SE OH. THIS COMBINED
   WITH MODERATE INSTABILITY AND 0-6 KM SHEAR VALUES IN THE 25 TO 40 KT
   RANGE SHOULD BE FAVORABLE FOR ROTATING STORMS WITH THE POTENTIAL FOR
   ISOLATED LARGE HAIL. THE GREATEST THREAT SHOULD BE IN THE 18Z TO 22Z
   TIMEFRAME.
   
   ..BROYLES.. 07/24/2007
   
   
   ATTN...WFO...PBZ...RLX...CLE...MRX...JKL...ILN...LMK...OHX...
   
   40098000 39378020 37948153 36348340 35858455 36038532
   36688580 37638501 38828344 40468239 40668076