MESOSCALE DISCUSSION 0402
   NWS STORM PREDICTION CENTER NORMAN OK
   0510 PM CDT SUN APR 05 2009
   
   AREAS AFFECTED...SWRN OH TO MIDDLE TN
   
   CONCERNING...TORNADO WATCH 117...
   
   VALID 052210Z - 052315Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 117 CONTINUES.
   
   NEW TORNADO WATCH WILL BE ISSUED SOON TO REPLACE WATCH 117.
   
   GRADUAL DESTABILIZATION IS EXPECTED AHEAD OF PRE-FRONTAL CONVECTION
   OVER THE NEXT FEW HOURS ACROSS MUCH OF CNTRL KY INTO SWRN OH. 
   ALTHOUGH INSTABILITY IS NOT EXPECTED TO BE THAT GREAT...BUOYANCY
   WILL BE MORE THAN ADEQUATE FOR ROBUST UPDRAFTS AHEAD OF DEEPENING
   SFC LOW AS IT TRACKS EWD ACROSS SRN IND INTO EXTREME SRN OH. 
   NEEDLESS TO SAY SHEAR PROFILES STRONGLY SUPPORT ORGANIZED UPDRAFTS
   AND THE THREAT OF DAMAGING WINDS IS AT LEAST POSSIBLE...ALONG WITH A
   LOW RISK OF ISOLATED TORNADOES.
   
   ..DARROW.. 04/05/2009
   
   
   ATTN...WFO...JKL...ILN...LMK...OHX...IND...PAH...MEG...
   
   LAT...LON   36288820 40048480 39178279 37278435 36038596 36288820