MESOSCALE DISCUSSION 0730
   NWS STORM PREDICTION CENTER NORMAN OK
   0747 AM CDT WED MAY 06 2009
   
   AREAS AFFECTED...PORTIONS NERN GA...SC...SRN NC.
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 061247Z - 061415Z
   
   SVR POTENTIAL MAY INCREASE OVER PORTIONS SRN PIEDMONT REGION OF SC
   AND NE GA DURING NEXT FEW HOURS.  
   
   ONGOING BAND OF NON-SVR TSTMS -- EVIDENT AT 1230Z FROM EXTREME SWRN
   NC SSWWD TO NRN FRINGES ATL METRO AREA -- SHOULD CONTINUE TO MOVE
   EWD...WITH SOME SWD BACKBUILDING POSSIBLE ALONG THE WAY.  FOREGOING
   CLOUD COVER WILL LIMIT RATE OF DIABATIC/DIURNAL HEATING THROUGH
   REMAINDER MORNING HOURS.  HOWEVER...PROSPECTIVE INFLOW AIR MASS --
   EMANATING FROM ERN GA AND WRN/CENTRAL SC -- WILL BE DESTABILIZED
   GRADUALLY BY MUTED INSOLATION...AS WELL AS BY WAA.  12Z FFC RAOB
   ALREADY SHOWS SFC-BASED EFFECTIVE INFLOW PARCEL...WITH MLCAPE NEAR
   1000 J/KG...AND BUOYANCY SHOULD INCREASE DOWNSHEAR OVER ERN GA AND
   SC DURING NEXT FEW HOURS.  ALTHOUGH VERTICAL MIXING AND COUPLING OF
   BOUNDARY LAYER SHOULD TAKE PLACE AS A RESULT...LLJ THROUGH
   APPROXIMATELY 850 MB STILL IS EXPECTED TO BE MAINTAINED AT 30-35 KT
   AS LARGE SCALE ASCENT APCHS AHEAD OF SHORTWAVE TROUGH OVER LOWER MS
   VALLEY.  AS THIS TROUGH APCHS...DEEP-LAYER SHEAR ALSO SHOULD
   INCREASE ACROSS THIS REGION...AIDING IN ORGANIZATION OF CONVECTION.
   
   ..EDWARDS.. 05/06/2009
   
   
   ATTN...WFO...RAH...ILM...CHS...CAE...GSP...FFC...
   
   LAT...LON   34168396 34878355 35038131 34887943 32838084 33838410
               34168396