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WWUS20 KWNS 212138

SEL5

SPC WW 212138

ARZ000-OKZ000-TXZ000-220600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 155

NWS Storm Prediction Center Norman OK

440 PM CDT Fri Apr 21 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  western Arkansas

  southeast Oklahoma

  north centrtal and northeast Texas



* Effective this Friday afternoon and Saturday morning from 440

  PM until 100 AM CDT.



* Primary threats include...

  A few tornadoes possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...A few supercells are expected to develop in vicinity of a

cold front and convectively reinforced boundary, and some storms may

evolve into line segments. Large hail, damaging wind and a few

tornadoes will be possible with this activity this evening.



The tornado watch area is approximately along and 110 statute miles

east and west of a line from 20 miles east northeast of Poteau OK to

45 miles south southeast of Fort Worth TX. For a complete depiction

of the watch see the associated watch outline update (WOUS64 KWNS

WOU5).



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.



&&



AVIATION...Tornadoes and 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 26035.



...Dial

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