Flash Flood Warning — Knox 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 13 at 11:21PM CDT until August 14 at 3:00AM CDT by NWS Lincoln IL
FFWILX The National Weather Service in Lincoln has issued a * Flash Flood Warning for... Southwestern Marshall County in central Illinois... Northern Peoria County in central Illinois... Northwestern Woodford County in central Illinois... Southern Stark County in north central Illinois... Northern Knox County in west central Illinois... * Until 300 AM CDT. * At 1121 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Galesburg, Chillicothe, Wyoming, Toulon, Knoxville, Princeville, Rome, Du
Effective August 14, 2026 at 12:21 AM ET · Expires August 14, 2026 at 4:00 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Lincoln IL
Expires
August 14, 2026 at 4:00 AM ET
Last Checked
1 minute ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Illinois
Flash Flood Warning
Flood Warning
Hydrologic Outlook
Flood Warning
Flash Flood Warning
Flash Flood Warning
Get Flash Flood Warning Alerts for Knox County
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Frequently Asked Questions
What does a Flash Flood Warning mean for Knox 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 (1 minute ago). It's set to expire August 14, 2026 at 4:00 AM ET.
How do I get notified about Flash Flood Warning alerts for Knox County?
Download StormCast free on Google Play and set Knox 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 Flash Flood Warning is also in effect for Marshall County, Peoria County, Woodford County, Stark County.