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379 

WWUS20 KWNS 162026

SEL8

SPC WW 162026

OKZ000-170300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 318

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT SUN JUN 16 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  MUCH OF OKLAHOMA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 320 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

SOUTHWEST OF CLINTON OKLAHOMA TO 25 MILES EAST OF MUSKOGEE

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 316...



DISCUSSION...AS A WEAK MID-LEVEL IMPULSE CONTINUES TO SPREAD

EAST-SOUTHEASTWARD...MAINLY MULTICELLULAR STORMS ARE LIKELY TO

CONTINUE TO INCREASE/INTENSIFY THROUGH LATE AFTERNOON ACROSS MUCH OF

OK...BUT ESPECIALLY IN VICINITY OF A SUBTLE OUTFLOW BOUNDARY.

DOWNBURSTS/LOCALIZED WIND DAMAGE AND BOUTS OF MAINLY MARGINALLY

SEVERE HAIL WILL POSSIBLE AS STORMS GRADUALLY SPREAD

EAST-SOUTHEASTWARD THROUGH EARLY EVENING.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 28020.





...GUYER

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