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Derecho Heading for Chicago! Gusts of 80 to 100 MPH Possible!

**Derecho heading for Chicago this evening. Severe Thunderstorm Watch just issued. Potential for 80 to 100 mph gusts, large hail, and tornadoes!**


Severe Thunderstorm Watch Number 426

NWS Storm Prediction Center Norman OK

1125 AM CDT Mon Aug 10 2020

The NWS Storm Prediction Center has issued a Severe Thunderstorm Watch for portions of:

Eastern Iowa

Northern Illinois

Far northwest Indiana

Far southern Wisconsin

Lake Michigan

* Effective this Monday morning and evening from 1125 AM until 700 PM CDT.


* Primary threats include...

- Widespread damaging winds and scattered significant gusts to 100 mph likely

- Isolated large hail events to 1.5 inches in diameter possible

- A couple tornadoes possible

SUMMARY...A derecho will rapidly progress across eastern Iowa and northern Illinois this afternoon. Widespread severe wind gusts, some of which should reach 80-100 mph are anticipated along the track of the bow. Brief tornadoes are also possible.

The severe thunderstorm watch area is approximately along and 85 statute miles north and south of a line from 20 miles west southwest of Cedar Rapids IA to 75 miles south southeast of Racine WI.

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