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Severe Thunderstorm Watch 159
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WW0159 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 159
   NWS STORM PREDICTION CENTER NORMAN OK
   750 AM CDT FRI APR 17 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PORTIONS OF CENTRAL TEXAS
   
   EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 750 AM UNTIL 100
   PM CDT.
   
   HAIL TO 2.5 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 65
   STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTH
   SOUTHWEST OF HONDO TEXAS TO 40 MILES NORTHEAST OF TEMPLE 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.
   
   DISCUSSION...BAND OF STRONG/LOCALLY-SEVERE STORMS CONTINUES MOVING
   EWD ACROSS CENTRAL TX...WITH SOME INCREASE IN CONVECTIVE INTENSITY
   NOTED OVER THE PAST HOUR.  WITH CONTINUED NWWD ADVECTION OF
   LOW-LEVEL MOISTURE AND SOME MODEST DIURNAL HEATING...ADDITIONAL
   DESTABILIZATION SHOULD SUPPORT FURTHER STORM
   DEVELOPMENT/INTENSIFICATION.  WITH VEERING/SHEAR SUPPORTIVE OF STORM
   ROTATION -- SUPERCELL STORMS ARE EXPECTED -- BOTH WITHIN THE MAIN
   CONVECTIVE BAND AND WITH MORE ISOLATED/CELLULAR DEVELOPMENT
   OCCURRING AHEAD OF THIS BAND.  EXPECT LARGE HAIL AND
   LOCALLY-DAMAGING WINDS WITH STRONGER STORMS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 25030.
   
   
   ...GOSS
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Page last modified: April 17, 2009
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