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Severe Thunderstorm Watch 57
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WW0057 Radar
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   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 57
   NWS STORM PREDICTION CENTER NORMAN OK
   1235 PM CST SAT FEB 16 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL TEXAS
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL
   700 PM CST.
   
   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 75
   STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES WEST OF NEW
   BRAUNFELS TEXAS TO 20 MILES WEST NORTHWEST OF SHERMAN TEXAS.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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...INCREASE IN THUNDERSTORM COVERAGE AND INTENSITY WILL
   CONTINUE ENEWD ACROSS WW THIS AFTERNOON AHEAD OF VERY STRONG UPPER
   SYSTEM NOW MOVING ACROSS SWRN TX.  DESPITE COOL AND STABLE SURFACE
   CONDITIONS...STEEP MID LEVEL LAPSE RATES AND STRONG ASCENT WILL
   MAINTAIN A FEW STRONGER STORMS.  IN ADDITION...SUFFICIENT EFFECTIVE
   BULK SHEAR FOR SUPERCELLS WILL ENHANCE THE POTENTIAL FOR LARGE HAIL
   WITH THE MORE INTENSE CORES.
   
   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 450. MEAN STORM
   MOTION VECTOR 22035.
   
   
   ...EVANS
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