Flood Warning Issued for Brown County, Illinois
This alert is no longer in effect.
NOAA issued it on May 10, 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 Brown County, Illinois, due to expected minor flooding along the Illinois River from Wednesday evening to late Monday night.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Brown County, Illinois
- Issued
- May 10, 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 Brown County, Illinois.
Alert Details
A Flood Warning has been issued by the National Weather Service (NWS) St Louis MO. This alert is for minor flooding and is effective from April 28, 2026, with conditions starting on April 29, 2026.
Affected Areas
The warning affects Brown County, Illinois, specifically along the Illinois River at La Grange LD and Illinois River at Meredosia.
What You Should Do
Motorists should not attempt to drive around barricades or drive cars through flooded areas. Be especially cautious at night when it is harder to recognize the dangers of flooding.
Expected Conditions
Minor flooding is forecast, with the river stage at 21.8 feet expected to rise above the flood stage of 23.0 feet to a crest of 23.4 feet. Impacts include flooding of adjacent farmland and wetlands, as well as Island Road in western Cass County.
Timeline
The alert is effective from April 28, 2026, at 11:25 AM CDT, with onset at April 29, 2026, at 7:00 PM CDT. It expires on April 29, 2026, at 11:30 PM CDT and ends on May 5, 2026, at 1:00 AM CDT.
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 (1,045 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 10, 2026.
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