Flood Warning — McDonough County, Illinois
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Current Status
🌊 Active: Flood Warning
Flood Warning issued August 15 at 8:24PM CDT until August 18 at 5:40AM CDT by NWS Quad Cities IA IL
...The Flood Warning continues for the following rivers in Illinois... La Moine River at Colmar affecting McDonough and Hancock Counties. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...La Moine River at Colmar. * WHEN...Until late Monday night. * IMPACTS...At 22.5 feet, Water affects lower roads around Birmingham. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 20.5 feet. - Forecast...The river is expected to rise to a crest of 23.0 feet tomorrow evening. It will then fall below flood stage late Monday evening. - Flood stage is 20.0 feet.
Effective August 15, 2026 at 9:24 PM ET · Expires August 16, 2026 at 9:30 PM ET
Event Details
Event Type
Flood Warning
Severity
severe
Issued By
NWS Quad Cities IA IL
Expires
August 16, 2026 at 9:30 PM ET
Last Checked
2 minutes ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.
Also In Effect For
This same Flood Warning also covers:
Other Active Alerts in Illinois
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Get Flood Warning Alerts for McDonough County
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Frequently Asked Questions
What does a Flood Warning mean for McDonough County, Illinois?
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Is this Flood Warning currently active?
Yes — this alert is active as of our last check (2 minutes ago). It's set to expire August 16, 2026 at 9:30 PM ET.
How do I get notified about Flood Warning alerts for McDonough County?
Download StormCast free on Google Play and set McDonough County, Illinois as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Flood Warning is also in effect for Hancock County.