MESOSCALE DISCUSSION 0318
   NWS STORM PREDICTION CENTER NORMAN OK
   0654 AM CDT SUN MAR 24 2013
   
   AREAS AFFECTED...EXTREME SERN AL...CENTRAL AND ERN FL
   PANHANDLE...SWRN GA...AND ADJACENT CW
   
   CONCERNING...TORNADO WATCH 63...
   
   VALID 241154Z - 241300Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 63 CONTINUES.
   
   SUMMARY...THE THREAT FOR SVR TSTMS AND TORNADOES CONTINUES ACROSS
   REMAINING VALID PORTIONS OF WW. A NEW WW MAY BE NEEDED ACROSS
   PORTIONS OF SERN GA AND NRN FL.
   
   DISCUSSION...TSTMS HAVE BEEN FAIRLY WIDESPREAD ALONG A SURFACE
   CONFLUENCE ZONE AND HAVE INCREASED IN INTENSITY SINCE 1030Z.  THIS
   CONFLUENCE ZONE EXTENDS SWD FROM A DEVELOPING SURFACE LOW PRESSURE
   CENTER OVER SWRN GA ACROSS THE CENTRAL FL PANHANDLE...WITH A WARM
   FRONT EXTENDING EAST FROM THE LOW TO THE GA/SC COAST. STRENGTHENING
   LOW-MID LEVEL FLOW HAS RESULTED IN STRONG 0-1 KM AND DEEP LAYER
   SHEARS ACROSS THE WW AREA WITH THE KTLH VWP SAMPLING 0-1 KM SRH IN
   EXCESS OF 450 M2/S2 AND 67 KT OF 0-6 KM SHEAR. SFC DEW POINTS SOUTH
   OF THE WARM FRONT WERE IN THE UPPER 60S RESULTING IN MLCAPE VALUES
   BETWEEN 500 AND 1000 J/KG NEAR AND SOUTH OF THE WARM FRONT.
   
   A SHORTWAVE LIFTING NEWD FROM THE BASE OF THE LARGE SCALE TROUGH
   WILL CONTINUE TO PROVIDE FORCING FOR ASCENT ACROSS THE WW AREA
   THROUGH MID MORNING. SVR TSTMS WITH A RISK FOR DAMAGING
   WINDS...LARGE HAIL AND A TORNADO OR TWO WILL CONTINUE TO BE
   POSSIBLE. THE SVR POTENTIAL WILL SHIFT EWD THROUGH 15Z AS LOW-LEVEL
   FLOW VEERS WITH THE PASSAGE OF THE CONFLUENCE ZONE...AND A NEW WW
   MAY BE REQUIRED OVER PORTIONS OF SERN GA AND NRN FL.
   
   ..BUNTING/THOMPSON.. 03/24/2013
   
   
   ATTN...WFO...CHS...TBW...JAX...FFC...TAE...
   
   LAT...LON   31998462 31968431 31788298 31758142 31398126 29698128
               29308277 29208340 29388566 30148525 31998462