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Severe Thunderstorm Watch 649
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WW0649 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low

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 649
   NWS STORM PREDICTION CENTER NORMAN OK
   515 PM CDT SUN AUG 2 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF WESTERN KANSAS
          MUCH OF OKLAHOMA PANHANDLE
          PARTS OF NORTHERN TEXAS PANHANDLE
   
   EFFECTIVE THIS SUNDAY AFTERNOON FROM 515 PM UNTIL MIDNIGHT 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 55
   STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTHEAST OF
   HILL CITY KANSAS TO 40 MILES SOUTH SOUTHEAST OF GUYMON OKLAHOMA. 
   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...CONTINUE...WW 648...
   
   DISCUSSION...STREAM OF MOIST AND VERY UNSTABLE AIR MASS RESIDES
   ACROSS THE WATCH AREA.  WITH STEEP LAPSE RATES AND 30-35 KT OF
   SHEAR...SEVERE THUNDERSTORMS INCLUDING ISOLATED SUPERCELLS ARE
   EXPECTED TO DEVELOP EWD ACROSS THE WATCH.  PRIMARY THREAT WILL BE
   VERY LARGE HAIL AND DAMAGING DOWNBURSTS...PARTICULARLY ASSOCIATED
   WITH SUPERCELLS.
   
   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 550. MEAN STORM
   MOTION VECTOR 33020.
   
   
   ...HALES
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