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600 

WWUS20 KWNS 050242

SEL8

SPC WW 050242

KSZ000-OKZ000-051000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 278

NWS STORM PREDICTION CENTER NORMAN OK

940 PM CDT TUE JUN 4 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND SOUTHERN KANSAS

  NORTHWESTERN AND NORTH CENTRAL OKLAHOMA



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 940 PM

  UNTIL 500 AM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS DAMAGING WIND GUSTS LIKELY WITH A FEW SIGNIFICANT GUSTS

    TO 80 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH

NORTHWEST OF HUTCHINSON KANSAS TO 35 MILES WEST OF OKLAHOMA CITY

OKLAHOMA.  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 276...WW 277...



DISCUSSION...FURTHER UPSCALE GROWTH OF THE ONGOING SEVERE MESOSCALE

CONVECTIVE SYSTEM ACROSS THE CENTRAL HIGH PLAINS IS EXPECTED DURING

THE NEXT FEW HOURS.  AIDED BY WEAK TO MODEST WESTERLY DEEP LAYER

MEAN FLOW...ACTIVITY MAY ACCELERATE EASTWARD ALONG A FRONT

NEAR/SOUTH OF THE INTERSTATE 70 CORRIDOR OF KANSAS...WHILE ALSO

DEVELOPING SOUTHWARD INTO A STRENGTHENING SOUTHERLY LOW-LEVEL

JET...TOWARD CENTRAL OKLAHOMA.  STRONG STRAIGHT LINE WIND GUSTS ARE

EXPECTED TO BECOME THE PREDOMINANT SEVERE WEATHER THREAT...BUT ONE

OR TWO TORNADOES MAY NOT BE OUT OF THE QUESTION...IN ADDITION TO THE

CONTINUING RISK FOR SEVERE HAIL.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 29035.





...KERR

