Alert archive / South Dakota / River Flood Warnings in 2024

River Flood Warning 106, NWS Sioux Falls, SD

June 23, 2024Union County, South Dakota; Plymouth County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Jun 23, 2024, 7:39 AM CDT for Union County, South Dakota; Plymouth County, Iowa. It was in force for 21 days.

The area

The counties it named.

The facts

Issued: Jun 23, 2024, 7:39 AM CDT (12:39 UTC)
Expired: Jul 14, 2024, 7:39 AM CDT
In force: 21 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Moderate

Counties Plymouth County, IA, Union County, SD

The radar

The Sioux Falls radar (KFSD), 92 km from the middle of the area, began a volume at 12:38 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 Big Sioux River near Jefferson (BSJS2). The gauge peaked at 44.49 ft at Jun 23, 2024, 11:00 PM CDT.

Action stage: 28 ft
Minor stage: 31 ft
Moderate stage: 35 ft
Major stage: 40 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06485910, 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 Sioux Falls, SD wrote its last area forecast discussion before this river flood warning went out at Jun 22, 6:45 PM CDT, 12 hours 54 minutes earlier.

Area forecast discussion, Jun 22, 6:45 PM CDT, 12 hours 54 minutes before

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Hazardous weather outlook, Jun 22, 5:35 PM CDT, 14 hours 4 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</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>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 22, 10:32 PM CDT	River Flood Warning	FSD	Union	21 days
Jun 23, 2:59 AM CDT	Heat Advisory	FSD	Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more	41 hr
Jun 23, 9:43 AM CDT	Areal Flood Warning	FSD	Bon Homme, Clay, Davison, Hanson, Hutchinson, McCook and 2 more	27 hr
Jun 23, 9:49 AM CDT	Areal Flood Warning	FSD	Minnehaha	51 hr
Jun 23, 10:50 AM CDT	River Flood Warning	FSD	Union	4 days

Nearby

River Flood Warnings in South Dakota, 2024 River Flood Warnings in Iowa, 2024 Every river flood warning in 2024

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.