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WWUS20 KWNS 081937

SEL0

SPC WW 081937

KSZ000-OKZ000-TXZ000-090300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 490

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT SUN JUN 8 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL KANSAS

       WESTERN OKLAHOMA

       EASTERN TEXAS PANHANDLE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

1000 PM 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHEAST OF

WICHITA KANSAS TO 40 MILES SOUTHEAST OF AMARILLO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 485...WW 486...WW

487...WW 488...WW 489...



DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS ARE EXPECTED TO

FORM ALONG WEAKENING SURFACE FRONT EXTENDING FROM JUST WEST OF ICT

TO NEAR AMA.  STRONG INSTABILITY...RELATIVELY STEEP LAPSE

RATES...AND FAVORABLE DEEP LAYER VERTICAL SHEAR WILL PROMOTE

GUSTY/DAMAGING WINDS AND HAIL IN STRONGER CELLS THROUGH THE EVENING.

 SOME THREAT ALSO EXISTS FOR THE BOUNDARY TO RETREAT LATER THIS

EVENING...WITH STORMS FORMING TO THE WEST OF INITIAL CONVECTION.



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 24030.





...HART

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