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Severe Thunderstorm Watch 399
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WW0399 Radar
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   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 399
   NWS STORM PREDICTION CENTER NORMAN OK
   205 AM CDT SAT JUN 16 2007
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTH TEXAS
   
   EFFECTIVE THIS SATURDAY MORNING FROM 205 AM UNTIL 900 AM CDT.
   
   HAIL TO 1 INCH 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 65
   STATUTE MILES EITHER SIDE OF A LINE FROM 35 MILES EAST OF AUSTIN
   TEXAS TO 45 MILES WEST OF COTULLA TEXAS.  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.
   
   OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 398. WATCH NUMBER 398 WILL NOT
   BE IN EFFECT AFTER 205 AM CDT. 
   
   DISCUSSION...FORWARD-PROPAGATING MCS WITH EMBEDDED BOWING SEGMENTS
   EXPECTED TO CONTINUE MAINLY ESE THROUGH SUNRISE.  AREA WIND PROFILES
   AND LOW LEVEL MOISTURE DISTRIBUTION SUGGEST THREAT FOR LOCALLY
   DAMAGING WIND/WET MICROBURSTS AS SELY LOW LEVEL WINDS CONTINUE
   BENEATH MODERATE WNW/NW FLOW ALOFT.
   
   AVIATION...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 500. MEAN STORM MOTION
   VECTOR 30030.
   
   
   ...CORFIDI
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