

560 

WWUS20 KWNS 270234

SEL0

SPC WW 270234

OKZ000-270900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 140

NWS STORM PREDICTION CENTER NORMAN OK

930 PM CDT FRI APR 26 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN AND EASTERN OKLAHOMA



* EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 930 PM

  UNTIL 400 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH

SOUTHWEST OF CHICKASHA OKLAHOMA TO 75 MILES EAST SOUTHEAST OF

MCALESTER 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 139...



DISCUSSION...THUNDERSTORMS DEVELOPING EAST SOUTHEASTWARD ALONG A

FRONTAL ZONE ACROSS CENTRAL INTO SOUTHEASTERN OKLAHOMA APPEAR LIKELY

TO MAINTAIN STRENGTH AT LEAST INTO THE 06-07Z TIME FRAME.  STRONGEST

ACTIVITY WILL REMAIN CAPABLE OF PRODUCING SEVERE HAIL AND A FEW

POTENTIALLY DAMAGING WIND GUSTS.



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 450. MEAN STORM

MOTION VECTOR 28035.





...KERR

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