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WWUS20 KWNS 092055

SEL8

SPC WW 092055

MNZ000-NDZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 418

NWS Storm Prediction Center Norman OK

355 PM CDT Mon Aug 9 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Extreme northwestern Minnesota

  Eastern North Dakota



* Effective this Monday afternoon and evening from 355 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Severe storm development is expected this afternoon across

central North Dakota, and storms will subsequently spread eastward

toward the Minnesota border toward late evening.  A mix of

supercells and storm clusters are expected, with the potential for

isolated very large hail near 2.5 inch diameter, severe outflow

winds near 70 mph, and a tornado or two.



The severe thunderstorm watch area is approximately along and 65

statute miles east and west of a line from 55 miles west northwest

of Hallock MN to 75 miles south southeast of Jamestown ND. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU8).



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 417...



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

24030.



...Thompson

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