Flood Warning Issued for Cuivre River Near Troy in Lincoln County, MO

Source: NOAA · Lincoln County, Missouri

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NWS St Louis has issued a Flood Warning for the Cuivre River near Troy in Lincoln County, Missouri, with minor flooding forecast from late tonight through Thursday morning.

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

This notice was issued by NOAA on May 30, 2026 and geographically references Lincoln County, Missouri. 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

A Flood Warning has been issued by the National Weather Service in St Louis MO. The alert is effective from May 18 at 8:16PM CDT and remains in effect until May 21 at 11:00AM CDT.

Affected Areas

The warning covers Lincoln County, Missouri, specifically the Cuivre River near Troy.

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 23.1 feet, water begins covering Frenchman Bluff Road (County Road 658) just west of the Cuivre River bridge. At 8:00 PM CDT Monday the stage was 16.2 feet. The river is expected to rise above flood stage late tonight to a crest of 23.1 feet early tomorrow afternoon.

Timeline

Flood stage is 21.0 feet. The river will rise above flood stage late tonight (onset May 19 at 4:31AM CDT), crest early tomorrow afternoon, and fall below flood stage early Wednesday morning, with the warning ending May 21 at 11:00AM CDT.

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 has issued a Flood Warning for the Cuivre River near Troy in Lincoln County, Missouri, with minor flooding forecast from late tonight through Thursday 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 Lincoln County, Missouri. 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.