NWS Chicago ILFA.W 0022September 20, 2026
Flood Warning: Lee, IL
The National Weather Service office in Chicago issued a flood warning for Lee in Illinois, which was in force until 7:15 p.m. local time on September 20. It was the 22nd areal 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 9.1 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Chicago IL
- Area
- Lee
- State
- Illinois
- Level
- Warning
- Issued
- 10:10 a.m. CDT, September 20, 2026
- Expires
- 7:15 p.m. CDT, September 20, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KLOT FA.W 0022
- 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
* WHAT...Flooding caused by excessive rainfall on the Green River and nearby tributaries. * WHERE...Lee County in north central Illinois... * WHEN...Until 715 PM CDT Sunday. * IMPACTS...Area creeks and streams are already elevated, with additional rises possible, especially with any additional rainfall. * ADDITIONAL DETAILS... - At 958 AM CDT, law enforcement and emergency management reported that water from area fields and small creeks continues to flow through Green River basin after heavy rain in the warned area early this morning. Flooding is already occurring, with rises on the Green River possible this afternoon. - Additional rain is expected, with localized amounts up to 0.5 inches possible through this afternoon. - Some locations that will experience flooding include... Amboy. - http://www.weather.gov/safety/flood
What the agency told people to do
A Flood Warning means flooding is imminent or may already be occurring. Persons along rivers, creeks, and other waterways should take immediate precautions to protect life and property.
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.