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Severe Thunderstorm Watch 439
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WW0439 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 439
   NWS STORM PREDICTION CENTER NORMAN OK
   1255 PM EDT WED JUN 17 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF EASTERN AND SOUTHERN KENTUCKY
          WESTERN NORTH CAROLINA
          PARTS OF MIDDLE AND EASTERN TENNESSEE
          PARTS OF WESTERN VIRGINIA
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL
   800 PM EDT.
   
   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 110
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF
   LONDON KENTUCKY TO 55 MILES SOUTH SOUTHEAST OF KNOXVILLE
   TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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...AIR MASS HAS BECOME MDTLY UNSTABLE WITH LITTLE
   REMAINING CINH ACROSS THE WATCH AREA.  THUNDERSTORMS EXPECTED TO
   INCREASE IN NUMBER AND INTENSITY THRU THE AFTERNOON.  WITH MLCAPES
   AOA 2000 J/KG AND EFFECTIVE SHEAR OF 30-40KT...SEVERE THUNDERSTORMS
   SHOULD DEVELOP.  AS STORMS EVOLVE INTO CLUSTERS/SHORT
   LINES...DAMAGING WINDS WILL BECOME INCREASING THREAT.
   
   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 30030.
   
   
   ...HALES
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