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Tornado Watch 311
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WW0311 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL1
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 311
   NWS STORM PREDICTION CENTER NORMAN OK
   205 PM CDT TUE MAY 13 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          MUCH OF CENTRAL AND EASTERN OKLAHOMA
          A LARGE PART OF NORTHERN TEXAS
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
   900 PM CDT.
   
   TORNADOES...HAIL TO 3.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
   MILES EAST AND WEST OF A LINE FROM 50 MILES WEST OF TEMPLE TEXAS
   TO 30 MILES NORTH NORTHWEST OF MUSKOGEE OKLAHOMA.  FOR A COMPLETE
   DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
   (WOUS64 KWNS WOU1).
   
   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...VERY UNSTABLE AIR MASS WITH MLCAPES AOA 3000 J/KG AND
   LITTLE REMAINING INHIBITION ARE IN PLACE AHEAD OF COLD FRONT ACROSS
   NRN TX/SRN OK.  THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY DURING THE
   AFTERNOON ALONG/AHEAD OF COLD FRONT AND THE DRY LINE EXTENDING SWD
   IN NRN TX.  MDT/STG DEEP LAYER SHEAR WILL SUPPORT SUPERCELLS
   INCLUDING THREAT OF VERY LARGE HAIL AND TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 24030.
   
   
   ...HALES
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