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Particularly Dangerous Situation (PDS) Tornado Watch 179
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   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 179
   NWS STORM PREDICTION CENTER NORMAN OK
   400 PM CDT TUE APR 24 2007
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND SOUTHERN TEXAS
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL
   1100 PM CDT.
   
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
   
   DESTRUCTIVE TORNADOES...LARGE 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 115 STATUTE
   MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTH SOUTHWEST OF
   DEL RIO TEXAS TO 30 MILES NORTHWEST OF WACO TEXAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU9).
   
   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...CONTINUE...WW 172...WW 173...WW
   174...WW 175...WW 176...WW 177...WW 178...
   
   DISCUSSION...SUPERCELLS WITH AN ATTENDANT THREAT FOR VERY LARGE
   HAIL...HIGH WIND AND POSSIBLY A STRONG TORNADO OR TWO...WILL DEVELOP
   OVER THE CNTRL/S TX AREA THROUGH THIS EVENING.  CONTINUED SFC
   HEATING...RICH MOISTURE INFLOW AND ARRIVAL OF SW TX UPR DISTURBANCE
   SHOULD CREATE FAVORABLE ENVIRONMENT FOR A FEW LONG-LIVED
   STORMS...ESPECIALLY ALONG WSW/ENE AXIS OVER CNTRL TX ALONG SRN
   FRINGE OF STORMS THAT FORMED EARLIER IN THE DAY.
   
   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 24035.
   
   
   ...CORFIDI
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