MESOSCALE DISCUSSION 0498
   NWS STORM PREDICTION CENTER NORMAN OK
   0353 PM CDT WED APR 17 2013
   
   AREAS AFFECTED...EXTREME SRN ILLINOIS/ WRN AND CNTRL KENTUCKY/FAR
   WRN NORTH CAROLINA/MIDDLE AND ERN TENNESSEE
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 115...
   
   VALID 172053Z - 172200Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 115
   CONTINUES.
   
   SUMMARY...THUNDERSTORMS HAVE DEVELOPED ALONG AND AHEAD OF A WWD
   MOVING OUTFLOW BOUNDARY ACROSS MUCH OF CNTRL KY AND MIDDLE
   TENNESSEE. AN ISOLATED SEVERE HAIL AND DAMAGING WIND THREAT WILL
   REMAIN POSSIBLE INTO THE EARLY EVENING.
   
   DISCUSSION...AFTERNOON SATELLITE IMAGERY INDICATES A WELL DEFINED
   OUTFLOW BOUNDARY CURRENTLY PROGRESSING WWD ACROSS PORTIONS OF CNTRL
   KENTUCKY AND MIDDLE TENNESSEE. ISOLATED THUNDERSTORMS HAVE DEVELOPED
   ALONG AND AHEAD OF PORTIONS OF THIS OUTFLOW BOUNDARY WHERE MLCAPE
   VALUES RANGE FROM 1000-2000 J/KG. THIS WILL SUPPORT LOCALIZED
   VIGOROUS UPDRAFTS...HOWEVER...WEAK DEEP LAYER SHEAR WILL PRECLUDE
   WIDESPREAD THUNDERSTORM ORGANIZATION. THUS...THE SEVERE THREAT
   SHOULD REMAIN FAIRLY ISOLATED INTO THE EARLY EVENING...WITH THE
   PRIMARY CONCERN BEING ISOLATED SEVERE HAIL AND DAMAGING WINDS.
   
   ..MARSH.. 04/17/2013
   
   
   ATTN...WFO...GSP...MRX...LMK...OHX...HUN...PAH...
   
   LAT...LON   34998626 37588870 38508637 37778570 37328608 36668600
               36408469 34988346 34998626