Flash Flood Warning Issued for Winnebago County, Illinois
This alert is no longer in effect.
NOAA issued it on April 25, 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 Flash Flood Warning for Winnebago County in north central Illinois, effective until 11:00 PM CDT, due to heavy rainfall causing rapid-onset flooding.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Winnebago County, Illinois
- Issued
- April 25, 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 Winnebago County, Illinois.
Alert Details
The National Weather Service in Chicago has issued a Flash Flood Warning, effective from 7:26 PM CDT on April 17, 2026, until 11:00 PM CDT the same day.
Affected Areas
This warning affects Winnebago County in north central Illinois, including specific locations such as Rockford, Loves Park, Machesney Park, Roscoe, South Beloit, Rockton, Rockford Airport, Cherry Valley, Winnebago, Davis Junction, Pecatonica, Lake Summerset, Durand, New Milford, Seward, Harrison, and Shirland.
What You Should Do
Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. Avoid areas prone to flooding.
Expected Conditions
Doppler radar indicates thunderstorms producing heavy rain, with up to 2 inches already fallen and an expected rainfall rate of 1 to 2 inches in 1 hour. Additional rainfall amounts up to 2 inches are possible, leading to flash flooding in creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas.
Timeline
The warning is effective from 7:26 PM CDT on April 17, 2026, and ends at 11:00 PM CDT on the same day.
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 (1,162 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 25, 2026.
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