Severe Thunderstorm Warning until 04:00AM 
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for... McHenry County in northeastern Illinois... Eastern Boone County in north central Illinois...
* Until 400 AM CDT.
* At 309 AM CDT, severe thunderstorms were located along a line extending from near Powers Lake to near Fontana-On-Geneva Lake to near Sharon, moving southeast at 50 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees.
* Locations impacted include... Crystal Lake, Algonquin, Lake in the Hills, McHenry, Woodstock, Huntley, Fox Lake, Harvard, Island Lake, Marengo, Cary, Johnsburg, Lakemoor, Spring Grove, Fox River Grove, Barrington Hills, Wonder Lake, Lakewood, Pistakee Highlands and Oakwood Hills. Including the following interstate... I-90 between mile markers 30 and 40. This includes... Mchenry County College, Mchenry County Fairgrounds, and Moraine Hills State Park.
* AFFECTED AREAS: MCHENRY, IL ... BOONE, IL
Instructions:
For your protection move to an interior room on the lowest floor of a building.
Address/Location
City of Crystal Lake
100 W Woodstock St
Crystal Lake, IL 60014
Contact
Emergency: 9-1-1
Non-emergencies: 815-356-3620