Todays weather in St. Louis MO · 20 May 2026 · 2 min

Todays weather in St. Louis MO - Wednesday - 20 May 2026

A Flood Warning is active for St. Louis right now, with the river forecast to peak at 18.5 feet — above the 17-foot flood stage — by Saturday morning. Get the day-by-day river stage timeline, road closures to expect, and what to wear for Thursday through Saturday.

Todays weather in St. Louis MO
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Todays weather in St. Louis MO - Wednesday - 20 May 2026

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What's covered

Flood Warning Now Active St. Louis

St. Louis, there's a Flood Warning with your name on it right now, and it runs through Saturday.

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River Stage Timeline Thursday Saturday

Here's how this plays out day by day. Thursday is when things start getting real.

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Commute and Road Safety Impact

For your commute, Thursday through Saturday is the window to take seriously. Low-lying roads near the river are the first places to watch.

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What to Wear This Week

Practically speaking, waterproof boots belong on your feet Thursday and Friday. A rain jacket isn't optional.

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Forecast Uncertainty and Weekend Outlook

The uncertainty window here matters. More rain than forecast means higher water than forecast.

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Sign-Off St. Louis Flood Week

St. Louis.

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