Flash Flood Warning Issued for Henry, Mercer, Rock Island and Warren Counties in Illinois
This alert is no longer in effect.
NOAA issued it on July 18, 2026, 5 weeks 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.
NWS Quad Cities IA IL has issued a Flash Flood Warning for parts of northwestern Illinois until 2:45 PM CDT on June 17.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Northwestern Illinois
- Issued
- July 18, 2026
- Issuing authority
- NWS Quad Cities IA 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 5 weeks ago; use the issuing agency's live warning service for current conditions in Northwestern Illinois.
Alert Details
A Flash Flood Warning has been issued by the National Weather Service in Quad Cities IA IL. The alert is effective from June 17 at 8:45 AM CDT until June 17 at 2:45 PM CDT.
Affected Areas
The warning covers Southwestern Henry County, Eastern Mercer County, South Central Rock Island County, and Northern Warren County in Illinois. Specific locations that will experience flash flooding include Burgess, Orion, Woodhull, New Windsor, Alpha, Sherrard, Andover, Little York, Seaton, North Henderson, Lake Warren, Lynn Center, Alexis, Coldbrook, Osco, Swedona, Ophiem, Gerlaw and Sunbeam. This includes Interstate 74 in Illinois between mile markers 18 and 33.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Expected Conditions
Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1.5 inches are possible.
Timeline
The Flash Flood Warning is in effect from 8:45 AM CDT to 2:45 PM CDT on June 17, 2026.
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 (1,109 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 18, 2026.
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