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WWUS20 KWNS 082257

SEL1

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NEZ000-SDZ000-090500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 421

NWS Storm Prediction Center Norman OK

455 PM MDT Sat Aug 8 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  western and central Nebraska

  southwest South Dakota



* Effective this Saturday afternoon and evening from 455 PM until

  1100 PM MDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible



SUMMARY...Widely scattered to scattered storms including both

multicells and a few supercells are expected to develop eastward

through the central Plains this evening, posing a risk for damaging

wind and large hail.



The severe thunderstorm watch area is approximately along and 95

statute miles east and west of a line from 70 miles north northeast

of Rapid City SD to 35 miles south southwest of North Platte NE. For

a complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU1).



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

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

few cumulonimbi with maximum tops to 500. Mean storm motion vector

27035.



...Dial

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