Flood Warning Issued for La Moine River at Ripley in Brown County, IL

Source: NOAA · Brown County, Illinois

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NWS St Louis MO has issued a Flood Warning for the La Moine River at Ripley in Brown County, IL, from this afternoon through Wednesday afternoon with minor flooding forecast.

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

This notice was issued by NOAA on July 12, 2026 and geographically references Brown County, 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.

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Alert Details

Flood Warning issued by NWS St Louis MO. Effective from this afternoon (June 14) to Wednesday afternoon (June 17 at 3:00PM CDT).

Affected Areas

Brown County, IL. La Moine River at Ripley.

What You Should Do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Expected Conditions

Minor flooding is forecast. At 22.0 feet (flood stage), farmland flooding and rural damages begin. At 23.0 feet, moderate flooding begins with extensive cropland flooded below the gauge near the LaGrange Lock Road bridge. At 8:45 AM CDT the stage was 21.6 feet. The river is expected to rise above flood stage late this afternoon to a crest of 22.8 feet tomorrow morning.

Timeline

From this afternoon (onset June 14 at 5:48PM CDT) until Wednesday afternoon (June 17 at 3:00PM CDT). The river will fall below flood stage Tuesday morning.

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 St Louis MO has issued a Flood Warning for the La Moine River at Ripley in Brown County, IL, from this afternoon through Wednesday afternoon with minor flooding forecast.
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 Brown County, 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.