Flood Warning issued for Cass, Fulton, Mason Counties in Illinois
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A Flood Warning remains in effect for the Illinois River at Havana affecting Cass, Fulton and Mason Counties until August 28 at 10:00AM CDT.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Central Illinois
- Issued
- August 23, 2026
- Issuing authority
- NWS Lincoln IL
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Flood Warning issued by NWS Lincoln IL. Effective from August 23 at 10:41AM CDT until August 28 at 10:00AM CDT.
Affected Areas
Cass County, IL; Fulton County, IL; Mason County, IL. Specifically the Illinois River at Havana.
What You Should Do
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation.
Expected Conditions
Minor flooding is occurring and minor flooding is forecast. At 9:45 AM CDT the stage was 16.2 feet. Flood stage is 14.0 feet. The maximum river stage in the 24 hours ending at 9:45 AM CDT was 16.5 feet.
Timeline
The warning is effective until Friday morning, with the river expected to fall below flood stage early Friday morning and continue falling to 12.5 feet by Sunday, August 30.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (867 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 23, 2026.
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