SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 392
   NWS STORM PREDICTION CENTER NORMAN OK
   925 AM CDT THU MAY 25 2006
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          MIDDLE INTO EASTERN TENNESSEE
   
   EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 925 AM UNTIL 600
   PM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES WEST
   SOUTHWEST OF NASHVILLE TENNESSEE TO 50 MILES EAST OF CROSSVILLE
   TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.
   
   DISCUSSION...LINE/CLUSTER OF STRONG TO SEVERE THUNDERSTORMS NOW
   INCREASING OVER NRN MIDDLE TN EXPECTED TO STRENGTHEN WITH DAYTIME
   HEATING.  MODIFIED SOUNDING AT NASHVILLE INDICATES AIR MASS WILL
   BECOME MODERATELY UNSTABLE SHORTLY.  IN ADDITION...REGION REMAINS
   WITHIN 35-45 KT WNWLY MID LEVEL FLOW AND SWLY LLJ IS FORECAST TO
   STRENGTHEN INTO MIDDLE/WRN TN THROUGH THE DAY. THEREFORE...SHEAR
   WILL BE SUFFICIENT FOR SUPERCELLS AND LINES/BOW ECHOES AS ACTIVITY
   MOVES ESEWD TOWARDS THE SRN APPALACHIANS...AND POSSIBLY BACK-BUILDS
   ACROSS MIDDLE AND INTO WRN TN...THROUGH THE DAY.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 29035.
   
   
   ...EVANS