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WWUS20 KWNS 301807

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 476

NWS Storm Prediction Center Norman OK

110 PM CDT Mon Aug 30 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  South-central North Dakota



* Effective this Monday afternoon and evening from 110 PM until

  700 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...A couple of slow-moving supercells have developed and may

persist along a baroclinic zone. The primary hazard should be large

hail, but a tornado or two is possible as well.



The severe thunderstorm watch area is approximately along and 40

statute miles east and west of a line from 5 miles northeast of

Garrison ND to 55 miles south southwest of Bismarck ND. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU6).



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 475...



AVIATION...A few severe thunderstorms with hail surface and aloft to

2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A

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

34010.



...Grams

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