MESOSCALE DISCUSSION 0538
   NWS STORM PREDICTION CENTER NORMAN OK
   0152 PM CDT MON APR 20 2009
   
   AREAS AFFECTED...COASTAL PORTIONS OF NC/SC/GA
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 201852Z - 202015Z
   
   MAINLY HAIL/DAMAGING WIND THREAT SHOULD CONTINUE TO INCREASE ACROSS
   THE COASTAL PORTIONS OF NC/SC/GA THIS AFTERNOON. MONITORING FOR A
   POSSIBLE WATCH.
   
   AS ALREADY NOTED PER VISIBLE/RADAR IMAGERY...AIDED BY GRADUAL LARGE
   SCALE HEIGHT FALLS...ISOLATED TO SCATTERED TSTMS SHOULD CONTINUE TO
   INCREASE ACROSS THE COASTAL PORTIONS OF NC/SC/GA THROUGH MID/LATE
   AFTERNOON ALONG/AHEAD OF COLD FRONT AND PREFRONTAL TROUGH. THE
   WEAKLY CAPPED PREFRONTAL WARM SECTOR IS CHARACTERIZED BY
   LOWER/MIDDLE 60S F DEWPOINTS...WHICH IS SUPPORTING AN AXIS OF MLCAPE
   TO AROUND 1000 J/KG...AS SAMPLED BY A SPECIAL 18Z CHARLESTON SC
   RAOB. A TENDENCY FOR VEERING LOW LEVEL FLOW SHOULD LIMIT THE TORNADO
   THREAT...BUT LARGELY UNDIRECTIONAL WIND PROFILES/STRENGTHENING MID
   LEVEL FLOW WILL SUPPORT WELL-ORGANIZED STORMS INCLUDING SOME
   SUPERCELLS CAPABLE OF LARGE HAIL/DAMAGING WINDS THROUGH LATE
   AFTERNOON. WILL MONITOR SHORT TERM TRENDS FOR A POSSIBLE WATCH.
   
   ..GUYER.. 04/20/2009
   
   
   ATTN...WFO...MHX...RAH...ILM...CHS...CAE...
   
   LAT...LON   31518131 32948136 35227794 34187758 31518131