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543 

WWUS20 KWNS 272059

SEL9

SPC WW 272059

ARZ000-OKZ000-280500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 279

NWS Storm Prediction Center Norman OK

405 PM CDT Sat May 27 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Northwest Arkansas

  Eastern and Central Oklahoma



* Effective this Saturday afternoon from 405 PM until Midnight

  CDT.



* Primary threats include...

  A few tornadoes and a couple intense tornadoes possible

  Widespread large hail and isolated very large hail events to 3

    inches in diameter likely

  Scattered damaging wind gusts to 70 mph likely



SUMMARY...Isolated severe thunderstorms are expected to form over

the eastern half of Oklahoma this afternoon and evening, drifting

into northwest Arkansas.  Very large hail, damaging winds, and

isolated tornadoes will be possible in the strongest cells.



The tornado watch area is approximately along and 75 statute miles

east and west of a line from 30 miles northwest of Grove OK to

Durant OK. For a complete depiction of the watch see the associated

watch outline update (WOUS64 KWNS WOU9).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Tornado Watch means conditions are favorable for

tornadoes and 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 275...WW 276...WW

277...WW 278...



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 3 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean

storm motion vector 27030.



...Hart

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