MESOSCALE DISCUSSION 1500
   NWS STORM PREDICTION CENTER NORMAN OK
   0653 PM CDT MON JUL 16 2007
   
   AREAS AFFECTED...NRN NC...MUCH OF VA...CNTRL/ERN MD AND ADJACENT
   DELMARVA PEN
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 523...
   
   VALID 162353Z - 170130Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 523
   CONTINUES.
   
   AN ADDITIONAL WW IS NOT ANTICIPATED.
   
   VIGOROUS CONVECTIVE DEVELOPMENT PERSISTS JUST SOUTH OF SURFACE
   FRONT...IN CLOSER PROXIMITY TO THE SOUTHERN FRINGE OF POLAR
   WESTERLIES...WEST WASHINGTON D.C. INTO AREAS NORTH/NORTHEAST OF
   BALTIMORE...WHERE THE BOUNDARY LAYER HAS YET TO BE SIGNIFICANTLY
   AFFECTED BY THUNDERSTORM OUTFLOW.  OTHERWISE...STRONGER STORMS HAVE
   BECOME CONFINED TO PRE-FRONTAL WIND SHIFT/SURFACE TROUGH...
   EXTENDING WEST OF NORFOLK VA INTO AREAS SOUTH/EAST OF DANVILLE VA. 
   A COOLER MARINE LAYER MAY RESULT IN WEAKENING TRENDS AS STORMS
   PROGRESS ACROSS NORFOLK AND ADJACENT AREAS THROUGH 00-01Z. 
   OTHERWISE...STABILIZATION ASSOCIATED WITH THE ONSET OF RADIATIONAL
   BOUNDARY LAYER COOLING IS EXPECTED TO RESULT IN DIMINISHING
   CONVECTIVE TRENDS NEXT FEW HOURS ACROSS NORTH CENTRAL VIRGINIA/
   CENTRAL MARYLAND.
   
   ..KERR.. 07/16/2007
   
   
   ATTN...WFO...PHI...AKQ...CTP...LWX...RAH...RNK...GSP...
   
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   35907848 35828118 37348024