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WWUS20 KWNS 260329

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NEZ000-261100-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 621

NWS Storm Prediction Center Norman OK

930 PM MDT Sun Aug 25 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern Nebraska



* Effective this Sunday night and Monday morning from 930 PM

  until 500 AM MDT.



* Primary threats include...

  Isolated significant damaging wind gusts to 75 mph possible

  Isolated very large hail events to 2 inches in diameter possible



SUMMARY...An isolated intense severe thunderstorm will initially

impact far northwest Nebraska late this evening, with additional

development and a general expansion of storms expected into the

overnight. Large hail will be possible on an isolated basis, and

severe-caliber wind gusts would be an increasing concern as storms

potentially form into a well-organized southeastward-moving line.



The severe thunderstorm watch area is approximately along and 45

statute miles north and south of a line from 20 miles north of

Alliance NE to 20 miles east southeast of Oneill 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 620...



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 550. Mean storm motion vector

31025.



...Guyer

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