

831 

WWUS20 KWNS 042011

SEL0

SPC WW 042011

KSZ000-MOZ000-OKZ000-050300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 540

NWS STORM PREDICTION CENTER NORMAN OK

315 PM CDT FRI OCT 4 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EASTERN KANSAS

  NORTHWEST MISSOURI

  WESTERN AND NORTH CENTRAL OKLAHOMA



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 315 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE

  NUMEROUS DAMAGING WIND GUSTS TO 70 MPH LIKELY

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

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

FALLS CITY NEBRASKA TO 30 MILES SOUTH OF ALTUS OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 539...



DISCUSSION...THUNDERSTORM DEVELOPMENT IS EXPECTED THIS AFTERNOON

ALONG A COLD FRONT OVER CENTRAL KS AND NORTHWEST OK...AS WELL AS

NEAR A DRYLINE OVER WESTERN OK.  SUFFICIENT DEEP LAYER VERTICAL

SHEAR IS PRESENT FOR A RISK OF SEVERE THUNDERSTORMS INCLUDING A FEW

SUPERCELLS.  LARGE HAIL AND DAMAGING WINDS ARE THE MAIN

THREAT...ALTHOUGH AN ISOLATED TORNADO CANNOT BE RULED OUT.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 24030.





...HART

