SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 365
   NWS STORM PREDICTION CENTER NORMAN OK
   1210 AM EDT SAT MAY 20 2006
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTH CENTRAL KENTUCKY
          FAR WESTERN NORTH CAROLINA
          PARTS OF MIDDLE AND EASTERN TENNESSEE
   
   EFFECTIVE THIS SATURDAY MORNING FROM 1210 AM UNTIL 600 AM EDT.
   
   HAIL TO 1.5 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 75
   STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF
   BOWLING GREEN KENTUCKY TO 55 MILES SOUTH SOUTHEAST OF KNOXVILLE
   TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   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...ELEVATED THUNDERSTORMS WILL INCREASE IN
   COVERAGE/INTENSITY FOR THE NEXT FEW HOURS IN ASSOCIATION WITH STRONG
   L0W-LEVEL WAA AND A 40-50 KT LLJ.  MUCAPE UP TO 1500 J/KG AND
   EFFECTIVE BULK SHEAR ON THE ORDER OF 50 KT WILL BE FAVORABLE FOR
   ORGANIZED SEVERE STORMS...INCLUDING SUPERCELLS.  THE PRIMARY SEVERE
   THREAT SHOULD BE LARGE HAIL...THOUGH DAMAGING WINDS COULD OCCUR
   LATER TONIGHT IF CONVECTION CAN MERGE INTO A LARGER CLUSTER AND
   DEVELOP A WELL-DEFINED COLD POOL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 31030.
   
   
   ...THOMPSON