Flood Warning Issued for La Moine River at Colmar in Hancock and McDonough Counties

Source: NOAA · Hancock and McDonough Counties, Illinois

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NWS Quad Cities IA IL has issued a Flood Warning for the La Moine River at Colmar affecting Hancock and McDonough Counties in Illinois from late Thursday night to late Saturday morning.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on July 5, 2026 and geographically references Hancock and McDonough Counties, Illinois. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Flood Warning, Illinois) map to related alerts in the same area of risk - browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

Alert Details

A Flood Warning has been issued by the National Weather Service in Quad Cities IA IL. The alert was sent at 10:13 PM CDT on June 10, 2026, and is in effect from late Thursday night through late Saturday morning.

Affected Areas

The warning covers the La Moine River at Colmar, impacting Hancock and McDonough Counties in Illinois.

What You Should Do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas.

Expected Conditions

Minor flooding is forecast. At 20.0 feet, water affects the lowest portions of Lambert Road and affects Lamar Road approximately 100 feet north of the intersection with County Road 26. The river is expected to rise above flood stage early Friday morning to a crest of 20.5 feet early Friday afternoon.

Timeline

The alert is effective from late Thursday night (onset at 1:00 AM CDT June 12) to late Saturday morning (ending 11:16 AM CDT June 13). Flood stage is 20.0 feet. At 9:45 PM CDT Wednesday the stage was 6.3 feet and steady.

Original source: NOAA Official Notice ↗

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Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
NWS Quad Cities IA IL has issued a Flood Warning for the La Moine River at Colmar affecting Hancock and McDonough Counties in Illinois from late Thursday night to late Saturday morning.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Hancock and McDonough Counties, Illinois. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.