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WWUS20 KWNS 111753

SEL8

SPC WW 111753

ARZ000-KSZ000-MOZ000-OKZ000-120200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 208

NWS Storm Prediction Center Norman OK

1255 PM CDT Thu May 11 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northwest Arkansas

  Southern Kansas

  Southwest Missouri

  North-central and eastern Oklahoma



* Effective this Thursday afternoon and evening from 1255 PM

  until 900 PM CDT.



* Primary threats include...

  Scattered large hail likely with isolated very large hail events

    to 3 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Severe thunderstorms are expected to develop and increase

this afternoon, initially across north-central and northeast OK

along and north-northeast of a surface low and residual outflow

boundary. These storms will spread into additional parts of eastern

OK, southern KS, southwest MO, and western AR through late afternoon

and early evening. Large hail should be the most common threat, but

locally damaging winds will also be possible along with some tornado

risk, mainly near the residual outflow boundary across parts of

north-central to northeast/east-central OK.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 15 miles west of Enid

OK to 30 miles east northeast of Fayetteville AR. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU8).



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.



&&



AVIATION...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 500. Mean storm motion vector

25025.



...Guyer

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