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378 

WWUS20 KWNS 240545

SEL0

SPC WW 240545

ARZ000-OKZ000-241100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 440

NWS STORM PREDICTION CENTER NORMAN OK

1245 AM CDT WED JUL 24 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHWEST ARKANSAS

  EASTERN OKLAHOMA



* EFFECTIVE THIS WEDNESDAY MORNING FROM 1245 AM UNTIL 600 AM 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST

NORTHWEST OF MUSKOGEE OKLAHOMA TO 25 MILES EAST OF DURANT

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 438...



DISCUSSION...A BOW ECHO JUST S OF TULSA IS EXPECTED TO CONTINUE SWD

ALONG A N-S ORIENTED OUTFLOW BOUNDARY PRESENT ACROSS FAR ERN OK WITH

A CONTINUED RISK FOR DAMAGING WINDS.  OTHER STORMS DEVELOPING ATOP

THE TRAILING COLD POOL ACROSS N-CNTRL OK WILL BE CAPABLE OF LARGE

HAIL WITH THE POTENTIAL FOR A SECONDARY...SWD-PROPAGATING CLUSTER

ARISING OUT OF THIS ACTIVITY.



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 500. MEAN STORM

MOTION VECTOR 33045.





...MEAD

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