Illinois, Wisconsin Flood Warning | Effective 04/15/2026 21:23

Headline: 
Flood Warning issued April 15 at 11:23PM CDT until April 17 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Event: 
Flood Warning
Urgency: 
Expected
Effective: 
April 15, 2026 - 9:23pm
Expires: 
April 16, 2026 - 9:30am
Description: 
...The National Weather Service in Milwaukee/Sullivan WI has issued a Flood Warning for the following rivers in Wisconsin...Illinois... Rock River At Jefferson affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Root River At Franklin affecting Milwaukee County. Sheboygan River At Sheboygan affecting Sheboygan County. Sugar River At Brodhead affecting Winnebago, Green and Rock Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sugar River at Brodhead. * WHEN...From this evening to early Friday afternoon. * IMPACTS...At 5.0 feet, Some roads become flooded about 6 miles downstream in Avon Township in Rock County. In the Avon Bottoms area of Rock County, some minor flooding develops in Sugar River Park, including the boat ramp. * ADDITIONAL DETAILS... - At 11:00 PM CDT Wednesday the stage was 5.0 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:00 PM CDT Wednesday was 5.3 feet. - Forecast...The river will rise to 5.1 feet just after midnight tonight. It will then fall below flood stage late tonight to 4.9 feet tomorrow morning. It will rise above flood stage early tomorrow afternoon to 5.1 feet early Friday morning. It will then fall below flood stage again Friday morning. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 5.1 feet on 07/15/2017. - http://www.weather.gov/safety/flood
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued Thursday morning at 1130 AM CDT.
Area Description: 
Winnebago, IL; Green, WI; Rock, WI
Forcast Office: 
NWS Milwaukee/Sullivan WI
Sender: 
w-nws.webmaster@noaa.gov