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WWUS20 KWNS 242029

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 391

NWS Storm Prediction Center Norman OK

330 PM CDT Sat Jul 24 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern Illinois

  Northern Indiana

  Southwest Lower Michigan

  Lake Michigan



* Effective this Saturday afternoon and evening from 330 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...Thunderstorms are slowly intensifying along a line from

north of Chicago into northwest Illinois.  These storms will spread

southward through the afternoon, posing a risk of locally damaging

wind gusts and hail.



The severe thunderstorm watch area is approximately along and 45

statute miles north and south of a line from 50 miles west southwest

of Marseilles IL to 35 miles southeast of Kalamazoo MI. 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 390...



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

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

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

30025.



...Hart

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