Flood Warning Illinois | Effective 04/03/2026 20:12

Headline: 
Flood Warning issued April 3 at 10:12PM CDT until April 8 at 5:00AM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Expected
Effective: 
April 3, 2026 - 8:12pm
Expires: 
April 4, 2026 - 2:15pm
Description: 
...The National Weather Service in Chicago IL has issued a Flood Warning for the following rivers in Illinois... Illinois River at Ottawa affecting La Salle County. For the Illinois River (Upper)...including Ottawa...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Illinois River from Heritage Harbor east of Ottawa downstream to Starved Rock Lock and Dam, including the Ottawa gauge. * WHEN...Until early Wednesday morning. * IMPACTS...At 466.5 feet, Low-lying sections of Fox River Park in Ottawa are inundated including Hudson Street River Walk. St. Clair Street is threatened in Ottawa. * ADDITIONAL DETAILS... - At 9:30 PM CDT Friday the stage was 462.8 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 466.1 feet early Sunday afternoon. It will then fall below flood stage late Tuesday evening. - Flood stage is 463.0 feet. - http://www.weather.gov/safety/flood
Instruction: 
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Saturday afternoon.
Area Description: 
La Salle, IL
Forcast Office: 
NWS Chicago IL