Flood Warning Issued for Adams County, Illinois and Marion County, Missouri
This alert is no longer in effect.
NOAA issued it on April 27, 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.
The National Weather Service has issued a Flood Warning for Adams County in Illinois and Marion County in Missouri due to expected minor flooding on the Mississippi River.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Western Illinois and Northeastern Missouri
- Issued
- April 27, 2026
- Issuing authority
- NWS St Louis MO
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 Western Illinois and Northeastern Missouri.
Flood Warning Alert
Alert Details
A Flood Warning has been issued by the National Weather Service (NWS) St Louis MO. It is an NWS alert type code FLW, with the warning effective immediately.
Affected Areas
The warning affects Adams, IL and Marion, MO, specifically along the Mississippi River at Lock & Dam 21 and at Quincy.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Expected Conditions
Minor flooding is forecast. The river is expected to rise above the 18.0-foot flood stage, cresting at 18.6 feet. At 14.0 feet, unprotected bottomlands flood.
Timeline
The warning is effective from April 18, 2026, at 12:05 PM CDT, with onset at 5:48 PM CDT on April 18, 2026, and expires at 12:15 AM CDT on April 20, 2026. It is in effect from this afternoon until further notice.
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 (861 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 27, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.