Flood Warning Issued for Kane, Lake, and McHenry Counties in Illinois
This alert is no longer in effect.
NOAA issued it on April 7, 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 in Chicago has issued a Flood Warning for Kane, Lake, and McHenry counties in Illinois, with minor flooding expected along the Fox River from Tuesday afternoon to Saturday evening.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Northeastern Illinois
- Issued
- April 7, 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 Northeastern Illinois.
Alert Details
The Flood Warning has been issued by the National Weather Service (NWS) Chicago IL. It is effective from April 6, 2026, at 8:26 PM CDT, with onset at April 7, 2026, at 1:00 PM CDT.
Affected Areas
The warning affects Kane, IL; Lake, IL; and McHenry, IL counties. Specifically, it impacts the Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge.
What You Should Do
Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. Avoid the affected areas as flooding is imminent or occurring.
Expected Conditions
Minor flooding is forecast. The river stage is currently at 9.4 feet and is expected to rise above the flood stage of 9.5 feet to a crest of 9.7 feet on Wednesday evening.
Timeline
The alert is effective from April 7, 2026, at 1:00 PM CDT (onset) and ends on April 11, 2026, at 7:00 PM CDT. It expires on April 7, 2026, at 2:30 PM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (998 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 7, 2026.
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