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WWUS20 KWNS 271954

SEL3

SPC WW 271954

IAZ000-MNZ000-WIZ000-LSZ000-280300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 353

NWS Storm Prediction Center Norman OK

255 PM CDT Mon Aug 27 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  northern Iowa

  central and southern Minnesota

  northwest Wisconsin

  Lake Superior



* Effective this Monday afternoon and evening from 255 PM until

  1000 PM CDT.



* Primary threats include...

  Widespread damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...Storms are expected to continue developing over the upper

Mississippi Valley and Great Lakes region this afternoon and

evening, eventually evolving into an organized MCS capable of

numerous instances of damaging wind and a couple of tornadoes.



The severe thunderstorm watch area is approximately along and 90

statute miles north and south of a line from 10 miles southwest of

Worthington MN to 70 miles south of Ironwood MI. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU3).



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

1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

24035.



...Dial

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