Flood Warning Issued for Boone and Winnebago Counties in Illinois
This alert is no longer in effect.
NOAA issued it on April 16, 2026, 4 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 Boone and Winnebago counties in Illinois, with minor flooding expected on the Kishwaukee River from this afternoon until Saturday morning.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Northern Illinois
- Issued
- April 16, 2026
- Issuing authority
- NWS Chicago 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 4 months ago; use the issuing agency's live warning service for current conditions in Northern Illinois.
Alert Details
A Flood Warning has been issued by the National Weather Service (NWS) Chicago IL. It is effective from April 16, 2026, at 7:30 AM CDT, with onset at 1:00 PM CDT on the same day.
Affected Areas
The warning affects Boone and Winnebago counties in Illinois, specifically the Kishwaukee River at Belvidere, from County Line Road downstream to the confluence with South Branch Kishwaukee River.
What You Should Do
Persons along rivers and streams in the warned area should take immediate precautions to protect life and property.
Expected Conditions
Minor flooding is forecast. The river stage is currently at 8.5 feet and is expected to rise above the flood stage of 9.0 feet this afternoon, cresting at 9.4 feet just after midnight tonight, and then falling below flood stage early Saturday morning. At 9.5 feet, Holiday Acres Campground east of Belvidere and Northwoods RV Resort in Garden Prairie are threatened.
Timeline
The alert is effective from April 16, 2026, at 7:30 AM CDT, with onset at 1:00 PM CDT, expires on April 17, 2026, at 1:30 AM CDT, and ends on April 18, 2026, at 7:00 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 (1,127 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 16, 2026.
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