Illinois Severe Flood Warning | Effective 06/18/2026 09:43

Headline: 
Flood Warning issued June 18 at 11:43AM CDT by NWS St Louis MO
Event: 
Flood Warning
Urgency: 
Expected
Effective: 
June 18, 2026 - 9:43am
Expires: 
June 19, 2026 - 9:45pm
Description: 
...The National Weather Service in St Louis has issued a Flood Warning for the following rivers in Illinois... Illinois River at La Grange LD. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Illinois River at La Grange LD. * WHEN...From Friday afternoon until further notice. * IMPACTS...At 24.0 feet, Extensive wetland acreage south of La Grange begins flooding. * ADDITIONAL DETAILS... - At 11:00 AM CDT Thursday the stage was 22.3 feet and rising. - Forecast...The river is expected to rise above flood stage early tomorrow afternoon and continue rising to a crest of 24.2 feet Monday evening. - Flood stage is 23.0 feet.
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Area Description: 
Brown, IL
Forcast Office: 
NWS St Louis MO