MESOSCALE DISCUSSION 0352
   NWS STORM PREDICTION CENTER NORMAN OK
   0512 PM CDT TUE MAR 31 2009
   
   AREAS AFFECTED...SRN MS...SRN AL...NRN FL...SWRN GA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 98...
   
   VALID 312212Z - 312345Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 98
   CONTINUES.
   
   HIGHEST SVR POTENTIAL HAS SHIFTED INTO NRN FL AND SRN GA LATE THIS
   AFTN...BUT ISOLD LARGE HAIL RISKS WILL REMAIN ACROSS SRN MS AND SRN
   AL FOR A COUPLE MORE HOURS.
   
   AN EARLY DAY MCS HAS MATURED AND CONTINUES TO TRANSLATE EWD ALONG
   THE ERN GULF CST ALONG/N OF THE SWLY LLJ CORE.  SYSTEM HAS PRODUCED
   AN MCV OVER SWRN GA WITH THE TRAILING COLD OUTFLOW STRETCHING E-W
   ACROSS THE FL PNHDL AND SWRN GA.  STORM MODE HAS GENERALLY FAVORED
   BOWISH SIGNATURES ALONG THE LEADING EDGE OF THE OUTFLOW...THOUGH
   EMBEDDED SUPERCELL STRUCTURES HAVE BEEN NOTED.  ACTIVITY MAY BE
   SLIGHTLY ELEVATED...PARTICULARLY ACROSS SRN GA...AND THIS COULD BE
   MITIGATING SVR DOWNDRAFTS FROM REACHING THE SFC.  TLH VWP DERIVED
   SHEAR CONTINUES TO REMAIN STRONG...AND A VERY LOW TORNADO THREAT
   WILL CONTINUE MAINLY WITH SUSTAINED CELLS AHEAD OF THE LINE...AND
   PRIMARILY ACROSS NRN FL.  
   
   MEANWHILE...ANOTHER SUBTLE IMPULSE WAS MOVING RAPIDLY NEWD OUT OF
   THE LWR MS VLY AND IS PROBABLY IMPETUS FOR THE TSTM CLUSTER MOVING
   ACROSS SRN MS.  AIR MASS DOWNSTREAM PROBABLY HAS NOT RECOVERED
   SUFFICIENTLY TO SUPPORT WIDESPREAD SVR STORMS OWING TO THE BLOCKING
   OF RETURN FLOW FROM THE GULF CST MCS.  HOWEVER...ACTIVITY MAY
   CONTINUE TO FLARE TO NEAR SVR /HAIL THREAT/ FROM TIME TO TIME AS IT
   MOVES INTO SRN AL.  IF ACTIVITY DOES NOT MAINTAIN INTENSITY...THEN
   NWRN PARTS OF THE WW MAY BE TRIMMED EARLY.
   
   ..RACY.. 03/31/2009
   
   
   ATTN...WFO...TAE...MOB...LIX...
   
   LAT...LON   31198900 31808807 31568567 31578348 30388339 29808367
               29758523 29818685 29948909 31198900