MESOSCALE DISCUSSION 0941
   NWS STORM PREDICTION CENTER NORMAN OK
   0610 PM CDT WED JUN 03 2009
   
   AREAS AFFECTED...VA...MD...SRN NJ
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 325...
   
   VALID 032310Z - 040045Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 325
   CONTINUES.
   
   THE SEVERE THREAT ONGOING ACROSS THE ERN PART OF WW 325 SHOULD
   GRADUALLY BECOME MORE ISOLATED. HOWEVER...INSTABILITY IN THE ERN
   PART OF THE WATCH APPEARS GREAT ENOUGH TO CONTINUE AN ISOLATED
   SEVERE THREAT BEYOND WATCH EXPIRATION AND MAY REQUIRE A LOCAL
   EXTENSION.
   
   LATEST SFC ANALYSIS AT 23Z SHOWS A SFC LOW OVER ERN VA WITH A COLD
   FRONT EXTENDING WWD FROM THE LOW INTO WRN VA. ALONG AND SOUTH OF
   THIS FRONT...INSTABILITY HAS DECREASED SUGGESTING ANY SEVERE THREAT
   SHOULD BE MARGINAL. A MORE SUBSTANTIAL SEVERE THREAT SHOULD EXIST
   EARLY THIS EVENING FROM NEAR A SFC LOW EWD TO NEAR THE COAST WHERE
   RUC ANALYSIS SUGGESTS SBCAPE VALUES RANGE FROM 1500 TO 2000 J/KG. IN
   THIS AREA...VERTICAL SHEAR AND INSTABILITY APPEAR LARGE ENOUGH FOR
   ISOLATED LARGE HAIL AND DAMAGING WIND GUSTS. THE GREATEST THREAT FOR
   ORGANIZED AND MORE PERSISTENT SEVERE STORMS SHOULD EXIST ALONG A
   QUASI-STATIONARY FRONT EXTENDING NEWD FROM THE LOW INTO SRN MD.
   SEVERE WEATHER PARAMETERS ARE MAXIMIZED IN THIS AREA SUGGESTING AN
   ISOLATED SUPERCELL THREAT EXISTS. THERE WILL BE A POSSIBILITY FOR A
   TORNADO WITH CELLS THAT INTERACT WITH THE BOUNDARY.
   
   ..BROYLES.. 06/03/2009
   
   
   ATTN...WFO...PHI...AKQ...LWX...RNK...PBZ...RLX...MRX...JKL...
   
   LAT...LON   36588002 36588165 37168188 37158206 37018208 36958234
               37218252 37508198 37648229 37858240 37938216 37668201
               37668173 37778176 37798143 37508125 37348139 37238114
               37358084 37448085 37388070 37488050 37398037 37797973
               37757963 38167944 38297983 39147929 39267943 39447906
               39707892 39677577 39877565 39867510 39617489 39697468
               39467440 38707511 38367509 37557567 37657625 37537643
               37547662 37457668 37387687 37497715 37307733 37157775
               37347858 37227882 37027886 37127928 37047956 36847966
               36828004 36708009 36618003 36588002