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WWUS20 KWNS 031925

SEL9

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NEZ000-SDZ000-WYZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 479

NWS Storm Prediction Center Norman OK

125 PM MDT Wed Jul 3 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northwest Nebraska Panhandle

  Western South Dakota

  Eastern Wyoming



* Effective this Wednesday afternoon and evening from 125 PM

  until 1000 PM MDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 80

    mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Multiple supercells should develop from southeast Wyoming

into western South Dakota. These discrete storms should consolidate

into an accelerating cluster later this evening. A brief tornado is

also possible, particularly in the Rapid City vicinity near the

Black Hills.



The severe thunderstorm watch area is approximately along and 80

statute miles east and west of a line from 15 miles west southwest

of Torrington WY to 105 miles north of Rapid City SD. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU9).



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 70 knots. A

few cumulonimbi with maximum tops to 550. Mean storm motion vector

24030.



...Grams

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