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Severe Thunderstorm Watch 637
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WW0637 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Very 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.
   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 637
   NWS STORM PREDICTION CENTER NORMAN OK
   900 PM CDT WED JUL 29 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          MUCH OF CENTRAL AND WESTERN OKLAHOMA
          PARTS OF NORTHWEST TEXAS
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 900 PM
   UNTIL 300 AM CDT.
   
   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 100
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES EAST OF
   CHANDLER OKLAHOMA TO 45 MILES WEST SOUTHWEST OF CLINTON OKLAHOMA.
    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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 635...WW 636...
   
   DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN NUMBER AND
   INTENSITY ACROSS THE WATCH AREA AS AIR MASS MDTLY UNSTABLE WITH
   LITTLE REMAINING CINH. WITH 30-35KT OF SHEAR AND STEEP MID LEVEL
   LAPSE RATES LARGE HAIL AND LOCAL DAMAGING WINDS WILL BE THE THREAT. 
   MORE ORGANIZED/DEVELOPING MCS TX PANHANDLE WILL ALSO BE A CONCERN AS
   IT MOVES E/SEWD INTO SWRN OK/NWRN TX.
   
   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 500. MEAN STORM
   MOTION VECTOR 29020.
   
   
   ...HALES
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