Illinois, Wisconsin Flood Warning | Effective 04/20/2026 14:19

Headline: 
Flood Warning issued April 20 at 4:19PM CDT until April 21 at 3:00AM CDT by NWS Milwaukee/Sullivan WI
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 20, 2026 - 2:19pm
Expires: 
April 21, 2026 - 1:00am
Description: 
...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Sugar River At Brodhead affecting Rock, Green and Winnebago Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sugar River at Brodhead. * WHEN...Until late tonight. * IMPACTS...At 5.5 feet, Some roads are flooded about 6 miles downstream in Avon Township in Rock County. In the Avon Bottoms area of Rock County, flooding is occurring in Sugar River Park. * ADDITIONAL DETAILS... - At 3:00 PM CDT Monday the stage was 5.5 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Monday was 6.3 feet. - Forecast...The river is expected to fall below flood stage late this evening and continue falling to 1.9 feet Monday, April 27. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 5.5 feet on 03/16/2008. - http://www.weather.gov/safety/flood
Instruction: 
Motorists should not attempt to drive around barricades or drive cars through flooded areas. Even 6 inches of fast-moving flood water can knock you off your feet and a depth of 2 feet will float your car. Never try to walk, swim, or drive through such swift water. If you come upon flood waters, stop, turn around and go another way. Additional information is available at www.weather.gov. The next statement will be issued late tonight at 300 AM CDT.
Area Description: 
Winnebago, IL; Green, WI; Rock, WI
Forcast Office: 
NWS Milwaukee/Sullivan WI