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WWUS20 KWNS 211548

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SPC WW 211548

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 202

NWS STORM PREDICTION CENTER NORMAN OK

1045 AM CDT TUE MAY 21 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN OKLAHOMA

  NORTHWEST TEXAS



* EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1045 AM UNTIL

  700 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS DAMAGING WIND GUSTS TO 70 MPH LIKELY

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

    INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST

OF ALTUS OKLAHOMA TO 15 MILES NORTH NORTHEAST OF POTEAU 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 201...



DISCUSSION...THE NORTHERN FLANK OF AN EVOLVING MESOSCALE CONVECTIVE

SYSTEM IS EXPECTED TO OVERSPREAD SOUTHERN OKLAHOMA LATE THIS

MORNING... THROUGH THE AFTERNOON HOURS.  SEVERE HAIL MAY BE THE

PRIMARY SEVERE THREAT IN STORMS APPROACHING THE OKLAHOMA CITY

METROPOLITAN AREA THROUGH MIDDAY...BUT POTENTIALLY DAMAGING WIND

GUSTS MAY BECOME THE PREDOMINANT SEVERE THREAT IN A SWATH CLOSER TO

THE RED RIVER THIS AFTERNOON.



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 27035.





...KERR

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