Alert archive / South Dakota / River Flood Warnings in 2020

River Flood Warning 15, NWS Aberdeen, SD

July 25, 2020Brown County, South Dakota

NWS Aberdeen, SD issued this river flood warning at Jul 25, 2020, 1:24 PM CDT for Brown County, South Dakota. It took effect at Jul 26, 2020, 9:06 AM CDT. It was in force for 70 hr.

The area

The counties it named.

The facts

Issued: Jul 25, 2020, 1:24 PM CDT (18:24 UTC)
In effect from: Jul 26, 2020, 9:06 AM CDT
Expired: Jul 29, 2020, 7:30 AM CDT
In force: 70 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: Moderate

County Brown County, SD

The radar

The Aberdeen radar (KABR), 16 km from the middle of the area, began a volume at 18:29 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 Elm River near Westport (WESS2). The gauge peaked at 20.42 ft at Jul 27, 2020, 1:00 AM CDT.

Action stage: 12 ft
Minor stage: 14 ft
Moderate stage: 16 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06471500, 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 Aberdeen, SD wrote its last area forecast discussion before this river flood warning went out at Jul 25, 12:34 PM CDT, 50 minutes earlier.

Area forecast discussion, Jul 25, 12:34 PM CDT, 50 minutes before

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Hazardous weather outlook, Jul 25, 4:44 AM CDT, 8 hours 40 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Local storm report, Jul 25, 8:38 AM CDT, 4 hours 46 minutes before

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      <p id="message2">
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        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, Jul 25, 9:00 AM CDT, 4 hours 24 minutes before

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      <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.
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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, Jul 25, 9:48 AM CDT, 3 hours 36 minutes before

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<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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Local storm report, Jul 25, 9:52 AM CDT, 3 hours 32 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">
        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>
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Local storm report, Jul 25, 9:56 AM CDT, 3 hours 28 minutes before

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<head>
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<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>

Local storm report, Jul 25, 12:28 PM CDT, 56 minutes before

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<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 Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 10:04 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	41 min
Jul 24, 10:58 PM CDT	Areal Flood Warning	ABR	Brown, McPherson	36 hr
Jul 24, 11:45 PM CDT	Flash Flood Warning	ABR	Brown, McPherson	6 hr
Jul 25, 7:08 AM CDT	River Flood Warning	ABR	Brown	4 days
Jul 25, 5:07 PM CDT	Severe Thunderstorm Warning	ABR	Corson	38 min
Jul 25, 5:45 PM CDT	Severe Thunderstorm Warning	ABR	Corson	60 min
Jul 25, 6:57 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	48 min

Nearby

River Flood Warnings in South Dakota, 2020 Every river flood warning in 2020

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.