Flood Warning Issued for Crawford and Washington Counties in Missouri
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The National Weather Service has issued a Flood Warning for Crawford and Washington Counties in Missouri, with minor flooding expected on the Meramec River near Sullivan from Tuesday afternoon to Thursday morning.
What this NWS weather alert tells you, and what most readers miss
This notice was issued by NOAA on May 7, 2026 and geographically references Crawford and Washington Counties, 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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Flood Warning in Missouri
Alert Details
A Flood Warning has been issued by the National Weather Service in St Louis, MO. It is effective from April 27, 2026, at 3:59 PM CDT until April 30, 2026, at 9:00 AM CDT.
Affected Areas
The warning affects Crawford County, MO and Washington County, MO, specifically the Meramec River near Sullivan.
What You Should Do
Turn around and do not drown when encountering flooded roads. Avoid driving through flooded areas and monitor conditions, as rainfall could cause river levels to rise higher than predicted.
Expected Conditions
Minor flooding is forecast, with the river expected to rise above flood stage to a crest of 11.1 feet. At 3:29 PM CDT on April 27, 2026, the stage was 6.6 feet, and flood stage is 11.0 feet.
Timeline
The onset is April 28, 2026, at 5:00 PM CDT. The warning expires on April 29, 2026, at 4:00 AM CDT and ends on April 30, 2026, at 9:00 AM CDT.
Original source: NOAA Official Notice ↗
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