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Tornado Watch 77
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WW0077 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Moderate
Severe Wind 65 kt+ Wind
High Moderate
Severe Hail 2"+ Hail
High 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.
   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 77
   NWS STORM PREDICTION CENTER NORMAN OK
   830 PM CDT THU APR 22 2010
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WESTERN AND NORTH CENTRAL OKLAHOMA
          NORTHWEST TEXAS AND THE TEXAS SOUTH PLAINS
   
   EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 830 PM
   UNTIL 400 AM CDT.
   
   TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
   MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF ALVA
   OKLAHOMA TO 10 MILES SOUTH OF BIG SPRING TEXAS.  FOR A COMPLETE
   DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
   (WOUS64 KWNS WOU7).
   
   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...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 75. WATCH NUMBER 75 WILL NOT BE IN EFFECT AFTER 830
   PM CDT. CONTINUE...WW 74...WW 76...
   
   DISCUSSION...SUPERCELLS...SOME LONG-LIVED AND VERY STRONG...EXPECTED
   TO PERSIST THROUGH EARLY FRI OVER PARTS OF THE TX SOUTH PLAINS AND
   NW TX/FAR SW OK AS SSWLY LLJ STRENGTHENS AND FURTHER MOISTENS AHEAD
   OF NM UPR IMPULSE.  STRENGTH OF MEAN WIND FIELD...INCREASING LOW-LVL
   MOISTURE ...AND BACKED LOW-LVL FLOW SUGGEST CONTINUED LIKELIHOOD FOR
   TORNADOES WITH SOME STORMS...IN ADDITION TO VERY LARGE HAIL AND DMGG
   WINDS.  FARTHER N...SEMI-DISCRETE STORMS/SUPERCELLS ALSO EXPECTED TO
   PERSIST IN SOMEWHAT MORE STRONGLY CAPPED BUT CONFLUENT ENVIRONMENT
   IN WRN/NRN OK.  THIS ACTIVITY ALSO COULD POSE A RISK FOR TORNADOES
   AS STORMS EVOLVE INTO LOOSELY-ORGANIZED/EPISODIC LEWPS.
   
   AVIATION...TORNADOES AND 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 24030.
   
   
   ...CORFIDI
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