Flash Flood Warning — Lee County, Illinois
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued August 9 at 11:00PM CDT until August 10 at 1:15AM CDT by NWS Chicago IL
At 1100 PM CDT, Doppler radar and automated rain gauges indicated that thunderstorms were moving out of the area and rain rates were decreasing. Up to 3 inches of rain occurred between Lee Center and Ashton due to earlier storms. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. Some locations that will experience flash flooding include... Amboy, Franklin Grove, Paw Paw, Lee, Compton, Steward, West Brooklyn and Lee Center.
Effective August 10, 2026 at 12:00 AM ET · Expires August 10, 2026 at 2:15 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Chicago IL
Expires
August 10, 2026 at 2:15 AM ET
Last Checked
52 minutes ago
What To Do
📋 Official NWS Guidance
A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property.
Other Active Alerts in Illinois
Flood Advisory
Flash Flood Warning
Flood Advisory
Tornado Warning
Flash Flood Warning
Severe Thunderstorm Warning
Get Flash Flood Warning Alerts for Lee County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Flash Flood Warning mean for Lee County, Illinois?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (52 minutes ago). It's set to expire August 10, 2026 at 2:15 AM ET.
How do I get notified about Flash Flood Warning alerts for Lee County?
Download StormCast free on Google Play and set Lee 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.