MESOSCALE DISCUSSION 0258
   NWS STORM PREDICTION CENTER NORMAN OK
   1214 PM CST SUN FEB 17 2008
   
   AREAS AFFECTED...AL...GA...FL
   
   CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY 
   
   VALID 171814Z - 171945Z
   
   SUPERCELL TSTMS HAVE INCREASED AS EXPECTED ACROSS SRN AL THROUGH THE
   MORNING. A NEW TORNADO WATCH...EAST OF TORNADO WATCH 61...WILL BE
   COORDINATED FOR PARTS OF SERN AL...WRN GA...AND THE FL PNHDL WITHIN
   THE NEXT HOUR.
   
   MODEST LOW LEVEL MOIST INFLOW AND BOUNDARY LAYER WARMING ARE
   EXPECTED TO CONTINUE TO SUPPORT A FEW ROBUST TSTMS THROUGH THE
   AFTERNOON FROM SWRN AL ACROSS THE FL PNHDL...AND INTO PARTS OF SERN
   AL AND SWRN GA. FAVORABLE LARGE SCALE ASCENT WITHIN/BENEATH RIGHT
   ENTRANCE REGION OF STRONG MID/UPPER LEVEL JET SHOULD CONTINUE TO
   MAINTAIN SUFFICIENTLY STEEP LAPSE RATES AND STRONG SHEAR ACROSS THE
   REGION. AS LONG AS CELLS CAN REMAIN DISCRETE...STRONG UPDRAFT
   ROTATION AND TORNADOES SHOULD BE SUPPORTED GIVEN EFFECTIVE SHEAR IN
   EXCESS OF 50KT AND 0-1KM SRH EXCEEDING 150 J/KG. IF LINEAR
   STRUCTURES EVOLVE FROM STORM MERGERS OVER TIME...FAST CELL MOTION
   WILL RESULT IN AN ENHANCED WIND DAMAGE THREAT.
   
   ..CARBIN.. 02/17/2008
   
   
   ATTN...WFO...FFC...TAE...BMX...MOB...
   
   32748667 33538603 33198477 31548406 30088430 29368476
   29358570 30098669 30688667