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334 

WWUS20 KWNS 272358

SEL4

SPC WW 272358

ARZ000-MOZ000-280700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 284

NWS Storm Prediction Center Norman OK

700 PM CDT Sat May 27 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Northern and western Arkansas

  Southern Missouri



* Effective this Saturday night and Sunday morning from 700 PM

  until 200 AM CDT.



* Primary threats include...

  A few tornadoes and a couple intense tornadoes possible

  Widespread damaging winds likely with isolated significant gusts

    to 80 mph possible

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible



SUMMARY...Severe thunderstorms will continue to develop within a

highly unstable environment from far southern Missouri into northern

and western Arkansas. Tornadoes will especially be possible with any

storm along a roughly west-east outflow boundary along the

Missouri/Arkansas border vicinity, while semi-discrete supercells or

evolving line-embedded mesovortices would also pose a tornado risk.

Otherwise, widespread and locally intense damaging winds will be

highly likely as storms accelerate east/southeastward this evening.



The tornado watch area is approximately along and 70 statute miles

north and south of a line from 60 miles west southwest of Harrison

AR to 35 miles east southeast of Poplar Bluff MO. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU4).



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...WW 279...WW 280...WW 281...WW 282...WW 283...



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

surface and aloft to 2.5 inches. Extreme turbulence and surface wind

gusts to 70 knots. A few cumulonimbi with maximum tops to 650. Mean

storm motion vector 29035.



...Guyer

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