Alert archive / Illinois / River Flood Warnings in 2026

River Flood Warning 28, NWS Quad Cities, IA

April 18, 2026Hancock County, McDonough County, Illinois

NWS Quad Cities, IA issued this river flood warning at Apr 18, 2026, 5:50 AM CDT for Hancock County, McDonough County, Illinois. It took effect at Apr 18, 2026, 1:32 PM CDT. It was in force for 62 hr.

The area

The counties it named.

The facts

Issued: Apr 18, 2026, 5:50 AM CDT (10:50 UTC)
In effect from: Apr 18, 2026, 1:32 PM CDT
Expired: Apr 21, 2026, 4:00 AM CDT
In force: 62 hr
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: Minor

Counties Hancock County, IL, McDonough County, IL

The radar

The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 10:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point La Moine River at Colmar (CLMI2). The gauge peaked at 20.34 ft at Apr 20, 2026, 7:00 AM CDT.

Action stage: 19 ft
Minor stage: 20 ft
Moderate stage: 22 ft
Major stage: 24 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05584500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this river flood warning went out at Apr 18, 5:38 AM CDT, 12 minutes earlier.

Area forecast discussion, Apr 18, 5:38 AM CDT, 12 minutes before

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Hazardous weather outlook, Apr 18, 3:25 AM CDT, 2 hours 25 minutes before

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In the hours before

Local storm report, Apr 18, 1:37 AM CDT, 4 hours 13 minutes before

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Local storm report, Apr 18, 1:57 AM CDT, 3 hours 53 minutes before

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Local storm report, Apr 18, 3:44 AM CDT, 2 hours 6 minutes before

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Local storm report, Apr 18, 3:47 AM CDT, 2 hours 3 minutes before

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Local storm report, Apr 18, 4:14 AM CDT, 1 hour 36 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Apr 18, 4:53 AM CDT, 57 minutes before

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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 18, 11:22 AM CDT	River Flood Watch	DVN	Clinton, Scott	58 hr
Apr 17, 7:08 PM CDT	Tornado Warning Tornado observed	DVN	Hancock, McDonough	52 min
Apr 17, 7:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Bureau, Putnam	63 min
Apr 17, 7:44 PM CDT	Tornado Warning	DVN	Bureau, Putnam	61 min
Apr 17, 8:46 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	23 min

Nearby

River Flood Warnings in Illinois, 2026 Every river flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.