MESOSCALE DISCUSSION 0323
   NWS STORM PREDICTION CENTER NORMAN OK
   0721 PM CDT SAT MAR 28 2009
   
   AREAS AFFECTED...PORTIONS OF THE LOWER OH AND TN RIVER VALLEYS
   
   CONCERNING...TORNADO WATCH 91...93...
   
   VALID 290021Z - 290115Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 91...93...CONTINUES.
   
   THREAT OF TORNADOES...DMGG WINDS...AND LARGE HAIL CONTINUES FOR MUCH
   OF WW0091 AND ALL OF WW0093. 
   
   00Z SURFACE ANALYSIS PLACES A 992 SURFACE LOW NEAR THE IN/KY BORDERS
   WITH A COLD FRONT EXTENDING SWD INTO CNTRL AL AND A WARM FRONT
   EXTENDING EWD THROUGH KY...SEWD INTO NC...AND EWD THROUGH NC TOWARDS
   THE COAST. FORCED LINE OF CONVECTION ALONG THE COLD FRONT CONTINUES
   TO SHOW SUPERCELLULAR STRUCTURES AND DISCRETE CELLS...ALTHOUGH WITH
   DECREASING INSTABILITY...INCREASING FORCING...AND SHEAR BECOMING
   ORIENTED PARALLEL TO THE LINE...CONVECTION IS BEGINNING TO TREND
   TOWARDS MORE LINEAR/LESS DISCRETE EVOLUTION. AS THIS OCCURS...HAIL
   AND WIND DMG WILL BECOME THE PRIMARY THREATS. HOWEVER...GIVEN
   STRENGTH OF DEEP LAYER SHEAR...70+ KTS PER VAD WIND PROFILE
   DATA...AND BACKED SURFACE FLOW WITHIN THE WARM SECTOR...ESPECIALLY
   NEAR THE WARM FRONT...TORNADOES WILL STILL BE POSSIBLE. AREAS IN NRN
   GA AND MIDDLE TN S AND E OF THE CURRENT WATCHES ARE BEING
   MONITORED...AND A NEW WW DOWNSTREAM OF CURRENT CONVECTION MAY BE
   NEEDED.
   
   ..HURLBUT.. 03/29/2009
   
   
   ATTN...WFO...MRX...JKL...FFC...LMK...OHX...IND...BMX...HUN...
   PAH...
   
   LAT...LON   34758408 34048532 34418659 38388709 38828609 38498522
               35308435 34758408