MESOSCALE DISCUSSION 0606
   NWS STORM PREDICTION CENTER NORMAN OK
   0233 PM CDT FRI APR 27 2007
   
   AREAS AFFECTED...ERN NC...SERN VA...VA CAPE
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 197...
   
   VALID 271933Z - 272130Z
   
   THE SEVERE WEATHER THREAT FOR VALID PORTIONS OF SEVERE THUNDERSTORM
   WATCH 197 CONTINUES.
   
   MID/UPR-LEVEL SPEED MAX MOVING THROUGH THE MID-ATLANTIC REGION HAS
   SUPPORTED SCATTERED STRONG TSTMS ACROSS ERN NC INTO SERN VA THIS
   AFTN.  IN WAKE OF THIS IMPULSE...RUC SOUNDINGS SUGGEST THAT
   SUBSIDENCE/MID-LVL WARMING WAS SPREADING NEWD AND HAS...OR
   WILL...BECOME SOMEWHAT UNSUPPORTIVE FOR SUSTAINED SEVERE TSTMS BY
   EARLY EVE.  UNTIL THEN...TSTM CLUSTERS/SHORT-LINE SEGMENTS WILL
   LIKELY FAVOR NERN NC INTO SERN VA FOR A FEW MORE HOURS.  DAMAGING
   WINDS AND PERHAPS HAIL WILL ACCOMPANY THE STRONGER STORMS.  AN
   UPSTREAM IMPULSE ROUNDING THE BASE OF THE GRTLKS TROUGH WILL SWING
   NEWD INTO THE SERN STATES/CAROLINAS LATER THIS EVE.  BY
   THEN...HOWEVER...THE INCREASING DOWNSLOPE LOW-LVL FLOW SHOULD OFFSET
   THE LARGER SCALE ASCENT AND MINIMIZE THE SVR RISKS DURING THE
   EVENING HOURS.
   
   ..RACY.. 04/27/2007
   
   
   ATTN...WFO...PHI...AKQ...MHX...LWX...RAH...RNK...
   
   38857647 38787540 38417472 37157554 36897570 36187589
   35647573 34957647 34817725 35057869 35857925