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Tornado Watch 16
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WW0016 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 16
   NWS STORM PREDICTION CENTER NORMAN OK
   1140 AM EST WED FEB 11 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN INDIANA
          CENTRAL KENTUCKY
          SOUTHWEST OHIO
          MIDDLE TENNESSEE
   
   EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1140 AM UNTIL
   600 PM EST.
   
   TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
   MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF
   LOUISVILLE KENTUCKY TO 65 MILES SOUTH SOUTHEAST OF NASHVILLE
   TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   DISCUSSION...NARROW LINE OF CONVECTION IS INTENSIFYING OVER WESTERN
   KY/TN AS VIGOROUS UPPER TROUGH ROTATES INTO REGION.  DESPITE VERY
   WEAK INSTABILITY...THE THREAT OF LOCALLY DAMAGING WINDS WILL
   INCREASE WITH TIME DUE TO DRYING ALOFT AND ENHANCED POTENTIAL FOR
   DOWNWARD TRANSFER OF MOMENTUM.  LOW AND MID LEVEL VERTICAL SHEAR
   PROFILES WILL ALSO BE FAVORABLE FOR BOW/LEWP STRUCTURES ALONG THE
   LINE AND AN ATTENDANT RISK OF ISOLATED TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350.
   MEAN STORM MOTION VECTOR 25040.
   
   
   ...HART
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