

521 

WWUS20 KWNS 311118

SEL7

SPC WW 311118

ARZ000-OKZ000-311900-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 477

NWS Storm Prediction Center Norman OK

620 AM CDT Mon Aug 31 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Arkansas

  Extreme eastern Oklahoma



* Effective this Monday morning and afternoon from 620 AM until

  200 PM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...A growing and increasingly organized thunderstorms

cluster, already responsible for a measured 51-kt gust at Muskogee

OK, may persist and push well into Arkansas into midday, in a

favorably moist and unstable environment.  Severe wind remains the

primary concern, with isolated hail possible.



The severe thunderstorm watch area is approximately along and 50

statute miles either side of a line from 25 miles northwest of

Poteau OK to 30 miles east of Pine Bluff AR. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU7).



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

1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A

few cumulonimbi with maximum tops to 600. Mean storm motion vector

29035.



...Edwards

