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000 

WWUS20 KWNS 232051

SEL6

SPC WW 232051

KSZ000-OKZ000-TXZ000-240300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 166

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT MON APR 23 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST KANSAS

       WESTERN OKLAHOMA AND THE OKLAHOMA PANHANDLE

       WEST TEXAS AND THE TEXAS PANHANDLE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 345 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF GARDEN

CITY KANSAS TO 15 MILES WEST SOUTHWEST OF CHILDRESS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 165...



DISCUSSION...TSTMS EXPECTED TO FORM IN THE NEXT HOUR OR TWO INVOF

CAPROCK AND/OR DIFFUSE DRY LINE OVER CNTRL AND ERN PARTS OF THE TX

PANHANDLE.  ADDITIONAL STORMS MAY ALSO FORM A BIT LATER IN UPSLOPE

FLOW/WARM ADVECTION AREA EXTENDING N INTO SRN/WRN KS.  WEAK

CONVERGENCE SHOULD LIMIT STORM COVERAGE.  BUT PRESENCE OF

INCREASINGLY MOIST BOUNDARY LAYER /DEWPOINTS RISING INTO THE UPPER

50S AND LOW 60S/ BENEATH STEEP MID LEVEL LAPSE RATES...AND MODERATE

TO STRONG SPEED/ DIRECTIONAL SHEAR...SUGGEST RAPID EVOLUTION TO

SUPERCELL MODE WITH AN ATTENDANT THREAT FOR TORNADOES/LARGE HAIL.



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.





...CORFIDI

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