MESOSCALE DISCUSSION 1158
   NWS STORM PREDICTION CENTER NORMAN OK
   0110 PM CDT TUE JUN 16 2009
   
   AREAS AFFECTED...TN/SERN IL/FAR SRN IND/KY/FAR SWRN WV AND SWRN VA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 432...
   
   VALID 161810Z - 161845Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 432
   CONTINUES.
   
   DESTRUCTIVE WINDS HAVE BECOME MORE LIKELY WITH THE LEADING LINE OF
   TSTMS TRACKING EWD ACROSS WRN KY/TN.  NEW WW WILL LIKELY BE NEEDED
   TO THE EAST OF WW 432 BY 19Z.
   
   GREATEST RISK FOR DESTRUCTIVE WINDS OF AT LEAST 60 KT EXTENDS FROM
   THE NRN TIER OF TN COUNTIES INTO KY WHERE STRONGEST WLY REAR INFLOW
   JET IS TRANSLATING EWD.  WSR-88D VADS IN WRN KY SINCE 17Z INDICATED
   THIS JET IS LOCATED IN THE 1-4 KM AGL LAYER WITH VALUES RANGING FROM
   50-60 KT.  THIS SUSTAINED REAR INFLOW JET COMBINED WITH A WELL
   DEFINED COLD POOL WILL SUPPORT CONTINUED EWD MOVEMENT WITH LATEST
   RADAR TRENDS SHOWING A FORWARD SPEED OF 40-45 KT.
   
   ADDITIONAL SURFACE HEATING DOWNSTREAM AS TEMPERATURES RISE THROUGH
   THE 80S IS RESULTING IN A MODERATELY UNSTABLE AIR MASS EWD TO THE
   CENTRAL/SRN APPALACHIANS AND THEN SEWD ACROSS SC.  THIS COMBINED
   WITH GIVEN SPEED OF CURRENT LINE OF TSTMS AND REAR INFLOW JET...A
   NEW WW WILL LIKELY BE NEEDED TO THE EAST OF WW 432 BY 19Z.
   
   ..PETERS.. 06/16/2009
   
   
   ATTN...WFO...RLX...GSP...MRX...JKL...ILN...LMK...OHX...IND...
   HUN...PAH...ILX...MEG...
   
   LAT...LON   35378985 36168885 37148802 38618853 38548666 38778599
               38788455 38428257 37928213 36838246 35898299 35058431
               35228580 35378985