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Tornado Watch 900
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WW0900 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 900
   NWS STORM PREDICTION CENTER NORMAN OK
   755 PM CDT FRI SEP 12 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WEST AND SOUTHWEST LOUISIANA
          EAST AND SOUTHEAST TEXAS
          COASTAL WATERS
   
   EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 755 PM
   UNTIL 1000 AM CDT.
   
   TORNADOES...HAIL TO 0.5 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 100 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTHWEST OF
   HUNTSVILLE TEXAS TO 30 MILES NORTHEAST OF LAFAYETTE LOUISIANA. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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.
   
   OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 898. WATCH NUMBER 898 WILL NOT BE IN EFFECT AFTER
   755 PM CDT. CONTINUE...WW 899...
   
   DISCUSSION...HURRICANE IKE WILL MAKE LANDFALL TONIGHT ALONG THE
   UPPER TX COAST AND MOVE INLAND NEAR THE I-45 CORRIDOR IN HOU-GLS
   THROUGH SUNRISE SATURDAY.  VERY STRONG LOW-LEVEL SHEAR WILL BE
   MAINTAINED THROUGH THE PERIOD ACROSS LA/TX WITHIN THE LARGE STORM
   ENVELOPE...AND A THREAT FOR AT LEAST ISOLATED TORNADOES WILL
   CONTINUE DESPITE DIURNAL WEAKENING OF LOW-LEVEL BUOYANCY.  EXPECT
   THE TORNADO THREAT TO SPREAD GRADUALLY OVERNIGHT AND INTO SATURDAY
   MORNING AS IKE PROGRESSES NWWD.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 15045.
   
   
   ...THOMPSON
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Page last modified: September 13, 2008
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