MESOSCALE DISCUSSION 2130
   NWS STORM PREDICTION CENTER NORMAN OK
   0724 AM CDT MON SEP 05 2011
   
   AREAS AFFECTED...CNTRL AND SRN AL THROUGH CNTRL GA
   
   CONCERNING...OUTLOOK UPGRADE 
   
   VALID 051224Z - 051330Z
   
   THE 13Z OUTLOOK WILL BE UPGRADED TO A MODERATE RISK FOR TORNADOES
   AND WILL INCLUDE PORTIONS OF SRN AND CNTRL AL THROUGH CNTRL GA.
   
   CENTER OF TROPICAL DEPRESSION LEE CENTERED OVER SERN LA IS BECOMING
   INFLUENCED BY HIGH AMPLITUDE TROUGH AMPLIFYING SEWD THROUGH THE OH
   AND TN VALLEYS. AS A RESULT A GENERAL NEWD MOTION IS EXPECTED TODAY
   WHILE THE SYSTEM SLOWLY TRANSITIONS TO EXTRATROPICAL. SEE LATEST
   DISCUSSION FROM HPC. SURFACE ANALYSIS SHOWS A FRONTOGENETICAL
   DEFORMATION AXIS FROM THE CENTER OF LEE NEWD THROUGH E-CNTRL MS INTO
   NRN AL. FARTHER SOUTH A COASTAL FRONT WAS LOCATED FROM SERN LA
   THROUGH THE FL PANHANDLE. LOW LEVEL FLOW WILL LIKELY REMAIN BACKED
   TO SELY BETWEEN THESE BOUNDARIES WITHIN THE ZONE OF EXPECTED
   STRONGER ISALLOBARIC FORCING. A 50 KT LLJ JUST EAST OF CYCLONE
   CENTER WILL SHIFT NEWD THROUGH SRN/CNTRL AL DURING THE DAY AND INTO
   GA LATER THIS AFTERNOON OR EVENING. THIS FEATURE WILL CONTINUE TO
   TRANSPORT HIGHER THETA-E AIR NWD THROUGH WARM SECTOR. THE COASTAL
   BOUNDARY IS EXPECTED TO SHIFT FARTHER INLAND AS LOW CLOUDS MIX OUT.
   BEST TORNADO THREAT SHOULD EXIST ALONG AND NORTH OF COASTAL BOUNDARY
   WHERE LARGEST HODOGRAPHS WILL COINCIDE WITH AXIS OF GREATEST
   BOUNDARY LAYER THETA-E ADVECTION AND DESTABILIZATION LATER THIS
   MORNING INTO THE AFTERNOON.
   
   ..DIAL.. 09/05/2011
   
   
   ATTN...WFO...FFC...TAE...BMX...MOB...
   
   LAT...LON   31378543 31568700 32968727 33908586 34128353 33058280
               31378543