MESOSCALE DISCUSSION 0777
   NWS STORM PREDICTION CENTER NORMAN OK
   0336 PM CDT FRI MAY 13 2011
   
   AREAS AFFECTED...CNTRL/WRN NC...NRN SC...SRN VA
   
   CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON 
   
   VALID 132036Z - 132100Z
   
   THE ENVIRONMENT ACROSS PORTIONS OF NC/SC AND INTO SRN VA HAS BECOME
   MODERATELY UNSTABLE AS STRONG HEATING HAS RESULTED IN TEMPERATURES
   HEATING INTO THE UPPER 70S ACROSS NC TO THE LOWER 90S OVER SC. MOIST
   AXIS ALSO EXTENDS NWD THROUGH THIS AREA /WITH DEW POINTS IN THE
   60S/...YIELDING SB CAPE VALUES OF 1500-2500 J/KG. SATELLITE TRENDS
   INDICATE CU HAS GENERALLY STRUGGLED THUS FAR /WITH EXCEPTION TO WRN
   AND FAR NRN NC AND SRN VA/ AS AN UPPER RIDGE REMAINS POSITIONED
   OVERHEAD...BUT A GENERAL INCREASE IN THUNDERSTORM COVERAGE IS
   ANTICIPATED OVER THE NEXT FEW HRS...POTENTIALLY FOCUSED ALONG A
   STATIONARY BOUNDARY DRAPED ACROSS NC. ADDITIONALLY...A COLD POOL
   PROPAGATING FROM THE W MAY PROMOTE NEW THUNDERSTORM DEVELOPMENT OVER
   WRN PORTIONS OF NC/SC. GIVEN A MODERATELY UNSTABLE ENVIRONMENT
   COMBINED WITH EFFECTIVE SHEAR VALUES OF 20-30 KTS...A THREAT FOR
   LARGE HAIL AND DMGG WINDS MAY MATERIALIZE...REQUIRING ISSUANCE OF A
   WW.
   
   ..ROGERS.. 05/13/2011
   
   
   ATTN...WFO...RAH...RNK...CAE...GSP...MRX...
   
   LAT...LON   36767883 34648033 34748281 36908140 36837950 36767883