MESOSCALE DISCUSSION 1775
   NWS STORM PREDICTION CENTER NORMAN OK
   0904 PM CDT THU AUG 16 2007
   
   AREAS AFFECTED...CNTRL WV EWD INTO VA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 606...610...
   
   VALID 170204Z - 170300Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   606...610...CONTINUES.
   
   FORWARD PROPAGATING TSTMS MOVING TOWARD TIDEWATER VA HAVE WEAKENED
   SOMEWHAT DURING THE MID-EVENING HOURS.  RADAR/OBS SUGGEST THAT THE
   OUTFLOW ASSOCD WITH THIS ACTIVITY HAS ACCELERATED WELL AHEAD OF THE
   TSTMS WITH SUBSEQUENT UPDRAFT DEVELOPMENT LIKELY ATOP THE COLD POOL.
    AS A RESULT...THE DMGG WIND POTENTIAL APPEARS TO BE DIMINISHING
   ACROSS SERN VA.
   
   UPSTREAM...A WELL DEVELOPED OUTFLOW BOUNDARY WAS PROGRESSING EWD
   ACROSS THE HIGHER WV TERRAIN TOWARD WRN VA.  NEW STORMS SEEM TO BE
   DEVELOPING ALONG THIS BOUNDARY AS IT ENCOUNTERS AN AIR MASS THAT WAS
   NOT OVERTURNED EARLIER IN THE DAY.  DMGG WIND GUSTS WILL CONTINUE TO
   BE A CONCERN ACROSS THE GREENBRIER VLY AND SWRN VA EWD INTO THE BLUE
   RIDGE MOUNTAINS LATER THIS EVENING.  
   
   FARTHER N...MORE STORMS CONTINUE TO FORM ALONG NRN EDGE OF THE
   OUTFLOW BOUNDARY ACROSS THE NRN WV MOUNTAINS.  THIS ACTIVITY WILL
   LIKELY PROGRESS EWD TOWARD NWRN VA LATER THIS EVE.  00Z STERLING
   SOUNDING EXHIBITED A CONSIDERABLE AMOUNT OF BUOYANCY POTENTIAL AND
   THE THREAT FOR AT LEAST ISOLD SVR STORMS WILL BE POSSIBLE FOR A FEW
   MORE HOURS...ROUGHLY FROM ELKINS WV EWD TOWARD CULPEPER VA.
   
   ..RACY.. 08/17/2007
   
   
   ATTN...WFO...AKQ...LWX...RNK...RLX...
   
   37838230 38478143 38938087 38947944 38787784 38667715
   38397633 37687661 36897689 36637743 36677831 36797973
   37378026 37568157