Flood Warning Issued for Cass, Fulton, and Mason Counties in Illinois
This alert is no longer in effect.
NOAA issued it on May 2, 2026, 3 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Flood Warning is in effect for Cass, Fulton, and Mason counties in Illinois due to minor flooding on the Illinois River, with river stages exceeding flood levels.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Central Illinois
- Issued
- May 2, 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: historical. It was issued 3 months ago; use the issuing agency's live warning service for current conditions in Central Illinois.
Alert Details
The Flood Warning has been issued by NWS Lincoln IL. It is effective from April 24, 2026, at 2:23 PM CDT.
Affected Areas
The warning affects Cass, IL; Fulton, IL; and Mason, IL counties, specifically along the Illinois River near Havana.
What You Should Do
Caution is urged when walking near riverbanks. 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 forecast. The Illinois River near Havana is at a stage of 16.6 feet, which is above the flood stage of 14.0 feet, and is expected to crest at 16.6 feet this evening.
Timeline
The alert is effective from April 24, 2026, at 2:23 PM CDT and expires on April 25, 2026, at 6:30 AM CDT, though it remains in effect until further notice for the specified river areas.
Original source: NOAA Official Notice ↗
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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 (935 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 2, 2026.
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