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WWUS20 KWNS 091928

SEL2

SPC WW 091928

NEZ000-SDZ000-WYZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 502

NWS Storm Prediction Center Norman OK

130 PM MDT Tue Jul 9 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northwest Nebraska

  Southeast South Dakota

  Northeast Wyoming



* Effective this Tuesday afternoon and evening from 130 PM until

  800 PM MDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Multiple discrete cells across northeast Wyoming should

move east-southeast across portions of South Dakota and Nebraska

into early evening. A couple long-track supercells are possible

producing swaths of severe hail and wind.



The severe thunderstorm watch area is approximately along and 65

statute miles north and south of a line from 30 miles south

southwest of Gillette WY to 20 miles east northeast of Valentine NE.

For a complete depiction of the watch see the associated watch

outline update (WOUS64 KWNS WOU2).



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 60 knots. A

few cumulonimbi with maximum tops to 450. Mean storm motion vector

29035.



...Grams

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