Illinois, Wisconsin Flood Warning | Effective 05/05/2026 19:29

Headline: 
Flood Warning issued May 5 at 9:29PM CDT until May 7 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
May 5, 2026 - 7:29pm
Expires: 
May 6, 2026 - 7:30am
Description: 
...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Rock River At Afton affecting Rock and Winnebago Counties. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. ...The Flood Warning is cancelled for the following river in Wisconsin... Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until early Thursday afternoon. * IMPACTS...At 9.0 feet, Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 9.2 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Tuesday was 9.4 feet. - Forecast...The river is expected to rise to a crest of 9.3 feet just after midnight tonight. It will then fall below flood stage Thursday morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 9.3 feet on 05/02/1921. - http://www.weather.gov/safety/flood
Instruction: 
Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this evening at 1030 PM CDT.
Area Description: 
Winnebago, IL; Rock, WI
Forcast Office: 
NWS Milwaukee/Sullivan WI
Sender: 
w-nws.webmaster@noaa.gov