MESOSCALE DISCUSSION 1242
   NWS STORM PREDICTION CENTER NORMAN OK
   1042 AM CDT SUN JUN 13 2004
   
   AREAS AFFECTED...TN NRN MS WRN KY NRN AL
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 131542Z - 131730Z
   
   CORRECTED TO TAKE OUT MENTION OF NC/GA
   
   A SLIGHT RISK HAS BEEN ADDED ACROSS TN...KY...NRN MS AND FAR NRN AL.
   WW MAY BE REQUIRED BY 18Z FOR PART OF THIS REGION...MOST LIKELY INTO
   WRN TN/NRN MS.
   
   CONVECTIVE COVERAGE WILL LIKELY INCREASE OVER THE NEXT FEW HOURS. A
   POTENTIAL FOR WIND DAMAGE WILL EXIST WITH THE STRONGER CELLS.
   
   SFC ANALYSIS SHOWS A QUASI-STATIONARY FRONT DRAPED FROM NORTH TO
   SOUTH ACROSS ERN KY AND ERN TN...WITH AN EWD MOVING OUTFLOW BOUNDARY
   NOW MOVING ACROSS NERN AR.  WITHIN THE WARM SECTOR...MLCAPE VALUES
   RANGE FROM 2000 TO 3000 J/KG...AND INSTABILITY WILL CONTINUE TO
   INCREASE LATE THIS MORNING ACROSS MUCH OF TN.  THE 12Z SOUNDING AT
   BNA SHOWED ABOUT 25 KT AT 500 MB...WITH 0-6 KM SHEAR AROUND 30 KT.
   THIS COMBINED WITH THE STRONG INSTABILITY WILL BE FAVORABLE FOR
   SEVERE MULTICELL STORMS.  STEEPENING LOW-LEVEL LAPSE RATES AND SFC
   DEWPOINTS AROUND 70 F WILL RESULT IN AN INCREASING THREAT FOR WIND
   DAMAGE THROUGH EARLY AFTERNOON.
   
   ..BROYLES.. 06/13/2004
   
   
   ATTN...WFO...MRX...JKL...FFC...LMK...OHX...HUN...PAH...MEG...
   
   34188950 34579040 36059018 36748770 37158513 36548474
   34968539