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625 

WWUS20 KWNS 271034

SEL2

SPC WW 271034

OKZ000-271700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 92

NWS STORM PREDICTION CENTER NORMAN OK

535 AM CDT SUN APR 27 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN OKLAHOMA



* EFFECTIVE THIS SUNDAY MORNING FROM 535 AM UNTIL NOON CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

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

NORTHEAST OF PONCA CITY OKLAHOMA TO 25 MILES SOUTH SOUTHWEST OF

ARDMORE OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



&&



DISCUSSION...A SQUALL LINE IS EXPECTED TO CONTINUE EVOLVING THROUGH

MIDDAY... ALONG/AHEAD OF AN EASTWARD ADVANCING COLD FRONT.  LARGE

HAIL MAY BE THE PRIMARY THREAT INITIALLY...BUT THE RISK FOR

POTENTIALLY DAMAGING WIND GUSTS PROBABLY WILL INCREASE AS CONVECTION

CONTINUES TO GROW UPSCALE...AND THE BOUNDARY LAYER AHEAD OF BEGINS

TO WARM AFTER DAYBREAK.



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 21045.





...KERR

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