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207 

WWUS20 KWNS 221934

SEL5

SPC WW 221934

OKZ000-TXZ000-230300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 75

NWS STORM PREDICTION CENTER NORMAN OK

235 PM CDT THU APR 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF WESTERN OKLAHOMA

       LARGE PART OF TEXAS PANHANDLE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 3 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES EAST NORTHEAST OF

GUYMON OKLAHOMA TO 75 MILES SOUTHEAST OF LUBBOCK TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 74...



DISCUSSION...DRY LINE HAS PROGRESSED INTO WRN PORTIONS OF TX/OK

PANHANDLE AND WILL BE FOCUS FOR SEVERE THUNDERSTORM DEVELOPMENT THRU

THE AFTERNOON.  IN ADDITION MORE DISCRETE STORMS ARE LIKELY VICINITY

CAP ROCK WHERE GREATER MOISTURE/INSTABILITY COUPLED WITH BACKED

BOUNDARY LAYER FLOW. SUPERCELLS WILL BECOME PRIMARY MODE DURING

AFTERNOON WITH INCREASING THREAT OF TORNADOES AND VERY LARGE

HAIL...PARTICULARLY ANY DISCRETE STORMS THAT DEVELOP.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 23030.





...HALES

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