Alert archive / Missouri / River Flood Warnings in 2026

River Flood Warning 11, NWS St. Louis, MO

March 7, 2026Jefferson County, Saint Louis County, Missouri

NWS St. Louis, MO issued this river flood warning at Mar 7, 2026, 7:30 PM CST for Jefferson County, Saint Louis County, Missouri. It took effect at Mar 8, 2026, 4:25 PM CDT. It was in force for 50 hr.

The area

The counties it named.

The facts

Issued: Mar 7, 2026, 7:30 PM CST (01:30 UTC)
In effect from: Mar 8, 2026, 4:25 PM CDT
Expired: Mar 10, 2026, 6:00 PM CDT
In force: 50 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: Minor

Counties Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 32 km from the middle of the area, began a volume at 01:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Meramec River at Arnold (ARNM7).

Action stage: 22 ft
Minor stage: 24 ft
Moderate stage: 35 ft
Major stage: 38 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 07019300, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this river flood warning went out at Mar 7, 2:15 PM CST, 5 hours 15 minutes earlier.

Area forecast discussion, Mar 7, 2:15 PM CST, 5 hours 15 minutes before

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Hazardous weather outlook, Mar 7, 2:16 PM CST, 5 hours 14 minutes before

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In the hours before

Local storm report, Mar 7, 2:37 PM CST, 4 hours 53 minutes before

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Local storm report, Mar 7, 2:41 PM CST, 4 hours 49 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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      <p id="message2">
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Mar 7, 4:39 PM CST, 2 hours 51 minutes before

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<head>
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  <title>Service Notice</title>
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
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The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 8, 8:50 AM CDT	River Flood Warning	LSX	Clinton	17 days

Nearby

River Flood Warnings in Missouri, 2026 Every river flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.