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658 

WWUS20 KWNS 092353

SEL8

SPC WW 092353

KSZ000-100700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 458

NWS STORM PREDICTION CENTER NORMAN OK

650 PM CDT SAT AUG 9 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWEST AND CENTRAL KANSAS



* EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 650 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES WEST OF

GARDEN CITY KANSAS TO 30 MILES NORTH NORTHEAST OF HUTCHINSON

KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 457...



DISCUSSION...STORMS OVER NWRN/WEST CENTRAL KS HAVE ORGANIZED INTO A

LINEAR SYSTEM WHICH IS EXPECTED TO INCREASE IN FORWARD SPEED AND

MOVE EWD/ESEWD TOWARD PARTS OF THE CENTRAL KS TONIGHT.  THIS WILL

OCCUR AS A STRENGTHENING CONVECTIVELY-GENERATED COLD POOL IS

DEVELOPING IN THE WAKE OF THE LINE.  THE DOWNSTREAM ENVIRONMENT IS

MOIST AND QUITE UNSTABLE WITH MLCAPE OF 2500-3000 J/KG.  ALTHOUGH

WINDS ALOFT ARE MODEST AT BEST...SUFFICIENT SHEAR EXISTS TO MAINTAIN

MESOSCALE ORGANIZATION WITH A CONTINUED THREAT OF SEVERE STORMS INTO

THE EARLY MORNING HOURS.



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 27025.





...WEISS

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