Flood Warning Issued for Marais Des Cygnes River at Osawatomie in Miami County

Source: NOAA · Miami County, Kansas

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The National Weather Service has issued a Flood Warning for Miami County, Kansas, with the Marais Des Cygnes River expected to crest at 29.6 feet.

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

This notice was issued by NOAA on March 20, 2026 and geographically references Miami County, Kansas. 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 regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

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, Miami County) 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

The National Weather Service in Pleasant Hill, MO, has issued a Flood Warning for the Marais Des Cygnes River at Osawatomie. This alert indicates that minor flooding is forecast for the region.

Affected Areas

The primary area affected is Miami County, Kansas, specifically along the Marais Des Cygnes River near Osawatomie.

What You Should Do

Residents and motorists are advised to "Turn around, don't drown" when encountering flooded roads. Most flood-related deaths occur in vehicles. The National Weather Service recommends avoiding flooded areas and staying informed through local weather updates.

Expected Conditions

As of 8:00 AM CDT on Wednesday, the river stage was recorded at 19.8 feet. The river is forecast to rise above the flood stage of 28.0 feet late this evening. It is expected to reach a crest of 29.6 feet by Thursday morning before falling below flood stage Thursday afternoon. At 28.0 feet, low-lying areas along the river begin to flood. For reference, at 31.0 feet, 347th Road or Main Street east of Highway 169 is under water.

Timeline

The Flood Warning is effective from Wednesday evening, March 11, and is expected to remain in place until Friday afternoon, March 13, at 3:00 PM 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?
The National Weather Service has issued a Flood Warning for Miami County, Kansas, with the Marais Des Cygnes River expected to crest at 29.6 feet.
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 Miami County, Kansas. 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.