Severe Thunderstorm Warning until 08:00PM Tuesday 
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for... Southwestern McHenry County in northeastern Illinois... Central Boone County in north central Illinois...
* Until 800 PM CDT.
* At 643 PM CDT, a severe thunderstorm was located over Poplar Grove, moving southeast at 25 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include... Crystal Lake, Lake in the Hills, Belvidere, Woodstock, Huntley, Marengo, Poplar Grove, Hampshire, Candlewick Lake, Lakewood, Capron, Timberlane, Union, Garden Prairie and Ridgefield. Including the following interstate... I-90 between mile markers 23 and 41. This includes...Boone County Fairgrounds and Mchenry County College.
* AFFECTED AREAS: BOONE, IL ... MCHENRY, IL
Instructions:
For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
Address/Location
City of Crystal Lake
100 W Woodstock St
Crystal Lake, IL 60014
Contact
Emergency: 9-1-1
Non-emergencies: 815-356-3620