Full Notification

The National Weather Service in Chicago has issued a Flash Flood Warning for the following counties in Illinois: Boone. McHenry. Northern Lake. Extreme Northwestern Kane. Winnebago.

Until 6:00 pm CDT.

At 1:14 pm CDT, National Weather Service Doppler radar indicated additional thunderstorms with very heavy rainfall moving into the warned area, some producing rainfall amounts of over an inch and a half in a an hour. Rainfall totals for today across the warning area by this evening could exceed 3 inches in some areas.

Runoff from this excessive rainfall will cause flash flooding to occur.

Recommended actions
Do not drive your vehicle into areas where the water covers the roadway. The water depth may be too great to allow your car to cross safely.

Be aware of stream, drainage channels, canyons and other areas known to flood suddenly. Flash floods can occur in these areas with or without typical warnings such as rain clouds or heavy rain.

Do not walk through moving water. Six inches of moving water can make you fall. If you have to walk in water, walk where the water is not moving. Use a stick to check the firmness of the ground in front of you.