NWS Chicago ILFL.W 0075September 20, 2026
Flood Warning: Lake, IL
The National Weather Service office in Chicago issued a flood warning for Lake in Illinois, which was in force until 3:15 a.m. local time on September 21. It was the 75th river flood warning the NWS office in Chicago issued in 2026. Illinois had 20 flood warnings in September 2026, against 17 in an average September of 2008-2025 (Illinois's flood warnings by year).
ExpiredWarning
In force for 11.3 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Chicago IL
- Area
- Lake
- State
- Illinois
- Level
- Warning
- Issued
- 9:14 a.m. CDT, September 20, 2026
- In force from
- 4:00 p.m. CDT, September 20, 2026
- Expires
- 3:15 a.m. CDT, September 21, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KLOT FL.W 0075
- Official source
- National Weather Service: the notice at its source
Flood Warnings in Illinois since 2008Every warning type in Illinois
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
...The National Weather Service in Chicago has issued a Flood Warning for the following rivers in Illinois... Des Plaines River near Russell affecting Lake County. * WHAT...Minor flooding is forecast. * WHERE...Des Plaines River from IL/WI state line downstream to US-41 in Gurnee, including the Russell gauge. * WHEN...From this afternoon until further notice. * IMPACTS...At 8.0 feet, Agricultural and park land is inundated near the river. Residential property is threatened near the river. * ADDITIONAL DETAILS... - At 8:30 AM CDT Sunday the stage was 6.5 feet. - Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 8.2 feet early Tuesday morning. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
What the agency told people to do
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 late tonight.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.