

000 

WWUS20 KWNS 212107

SEL5

SPC WW 212107

KSZ000-OKZ000-TXZ000-220400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 285

NWS STORM PREDICTION CENTER NORMAN OK

410 PM CDT MON MAY 21 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST KANSAS

       THE OKLAHOMA PANHANDLE

       THE TEXAS PANHANDLE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 410 PM UNTIL

1100 PM CDT.



HAIL TO 1.5 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF

GARDEN CITY KANSAS TO 30 MILES SOUTH OF AMARILLO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 282...WW 283...WW 284...



DISCUSSION...BAND OF TSTMS EXPECTED TO INTENSIFY AND MOVE E/NE INTO

THE TX PANHANDLE AND PERHAPS SW KS LATER THIS EVENING...WHERE LOW

LEVEL SHEAR AND DEPTH OF CONVERGENCE SUGGEST A FEW SUSTAINED CELLS

POSING A THREAT FOR HAIL/WIND.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 24025.





...CORFIDI

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