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WWUS20 KWNS 080327

SEL5

SPC WW 080327

KSZ000-OKZ000-081000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 485

NWS STORM PREDICTION CENTER NORMAN OK

1025 PM CDT WED AUG 7 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTH CENTRAL KANSAS

  NORTHWESTERN AND NORTH CENTRAL OKLAHOMA



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1025

  PM UNTIL 500 AM CDT.



* PRIMARY THREATS INCLUDE...

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

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES WEST

NORTHWEST OF HUTCHINSON KANSAS TO 55 MILES SOUTHWEST OF ENID

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 483...WW 484...



DISCUSSION...A BAND OF STRONG/SEVERE THUNDERSTORMS CONTINUES

SHIFTING EWD ACROSS WESTERN KANSAS AND THE TEXAS AND OKLAHOMA

PANHANDLES...WHILE OTHER STORMS HAVE BEGUN TO INTENSIFY NEAR THE RED

RIVER AREA OF SOUTHWESTERN OKLAHOMA.  WITH LOW-LEVEL EASTERLY FLOW

OBSERVED BENEATH MODEST MID-LEVEL WESTERLIES SUPPORTING FORWARD

PROPAGATION OF THE CONVECTION INTO AN INCREASINGLY UNSTABLE

ENVIRONMENT...EXPECT SEVERE THREAT TO EXPAND EAST OF PREVIOUSLY

ISSUED WW 483 OVER THE NEXT SEVERAL HOURS.  ALONG WITH POTENTIAL FOR

LARGE HAIL...DAMAGING WIND GUSTS CAN BE EXPECTED IN THE VICINITY OF

STRONGER PORTIONS OF THE EVOLVING LINE OF STORMS.



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 25035.





...GOSS

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