MESOSCALE DISCUSSION 2063
   NWS STORM PREDICTION CENTER NORMAN OK
   0615 PM CDT FRI AUG 20 2004
   
   AREAS AFFECTED...SWRN PA / NRN WV AND THE WV PANHANDLE / WRN MD
   PANHANDLE
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 768...
   
   VALID 202315Z - 210045Z
   
   STRONG / LOCALLY SEVERE THUNDERSTORMS CONTINUE MOVING ACROSS ERN
   PORTIONS OF WW.  STORMS WILL CONTINUE SHIFTING INTO WW 771...AND
   THIS COMBINED WITH WEAKENING TREND NOTED OVER THE PAST HOUR SUGGEST
   THAT WATCH MAY BE CANCELLED PRIOR TO ITS SCHEDULED 21/01Z
   EXPIRATION.
   
   LATEST RADAR IMAGERY SHOWS STRONGEST STORMS ACROSS WW EXIST IN A
   BROKEN N-S LINE FROM ELK COUNTY PA SWD INTO MINERAL COUNTY
   WV...THOUGH A WEAKENING TREND HAS BEEN NOTED OVER THAT PAST HOUR OR
   SO.  LOSS OF DAYTIME HEATING AND WIDESPREAD PRECIPITATION WILL
   CONTRIBUTE TO A CONTINUED DECREASE IN INSTABILITY...WHICH SUGGESTS
   THAT FURTHER WEAKENING OF CONVECTION SHOULD OCCUR BETWEEN NOW AND
   21/00Z.  WITH STORMS WEAKENING / MOVING EWD INTO NEWLY-ISSUED WW
   771...WATCH 770 MAY BE CANCELLED WITHIN THE HOUR.
   
   ..GOSS.. 08/20/2004
   
   
   ATTN...WFO...CTP...LWX...PBZ...
   
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