MESOSCALE DISCUSSION 0493
   NWS STORM PREDICTION CENTER NORMAN OK
   0453 PM CDT SAT APR 14 2007
   
   AREAS AFFECTED...SERN GA INTO SRN SC
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 142153Z - 142330Z
   
   SEVERE STORM POTENTIAL IS EXPECTED TO INCREASE THROUGH THE EVENING E
   OF WW 142 AND AN ADDITIONAL WW MAY BECOME NECESSARY.
   
   CLUSTERS OF TSTMS HAVE RECENTLY DEVELOPED FROM THE VICINITY OF VDI
   SWD TO SSE OF AYS...APPARENTLY FORCED BY CONVERGENCE ALONG NW-SE
   ORIENTED WARM FRONT AND MORE N-S ORIENTED CONFLUENCE ZONE.  AIR MASS
   S OF WARM FRONT AND W OF CONFLUENCE ZONE OVER S-CNTRL GA HAS BECOME
   QUITE WARM WITH TEMPERATURES OF 85-90 F...ALSO LIKELY CONTRIBUTED TO
   THIS STORM DEVELOPMENT.  WHILE PRIMARY LOW-LEVEL MOISTURE AXIS
   REMAINS TO THE W...DEWPOINTS ARE BEING TO INCREASE FROM OFF THE
   ATLANTIC OWING TO STRENGTHENING SELY LOW-LEVEL FLOW.  AS A
   RESULT...AIR MASS HAS BECOME WEAKLY TO MODERATELY UNSTABLE WITH
   SBCAPES OF 500-1000 J/KG.
   
   STRENGTHENING SWLY LLJ THIS EVENING (00-03Z TIMEFRAME) SHOULD: 1)
   SERVE TO ENHANCE INFLUX OF RICHER BOUNDARY LAYER MOISTURE AND
   RESULTANT INSTABILITY INTO REGION...AND 2) AUGMENT BACKGROUND
   LARGE-SCALE FORCING VIA WAA AND ISENTROPIC ASCENT.  PRIOR TO THIS
   TIME...STORMS MAY TEND TO REMAIN MORE ISOLATED OR IN SMALL CLUSTERS
   WITH SOME THREAT OF LOCALLY DAMAGING WINDS AND PERHAPS A TORNADO OR
   TWO GIVEN THE FAVORABLE SHEAR PROFILES ALREADY IN PLACE.
   
   ..MEAD.. 04/14/2007
   
   
   ATTN...WFO...CHS...JAX...FFC...
   
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