Alert archive / South Dakota / River Flood Warnings in 2019

River Flood Warning 47, NWS Aberdeen, SD

April 18, 2019Grant County, South Dakota

NWS Aberdeen, SD issued this river flood warning at Apr 18, 2019, 9:36 PM CDT for Grant County, South Dakota. It was in force for 31 hr.

The area

The counties it named.

The facts

Issued: Apr 18, 2019, 9:36 PM CDT (02:36 UTC)
Expired: Apr 20, 2019, 5:04 AM CDT
In force: 31 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: Minor

County Grant County, SD

The radar

The Aberdeen radar (KABR), 132 km from the middle of the area, began a volume at 02:35 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 Florence (FLOS2). The gauge peaked at 8.33 ft at Apr 19, 2019, 1:00 AM CDT.

Action stage: 7 ft
Minor stage: 8 ft
Moderate stage: 8.5 ft
Major stage: 9 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06479215, 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 Apr 18, 6:50 PM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Apr 18, 6:50 PM CDT, 2 hours 46 minutes before

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Hazardous weather outlook, Apr 18, 12:59 PM CDT, 8 hours 37 minutes before

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<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.
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    </section>
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</body>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 6:31 AM CDT	River Flood Warning	ABR	Codington	28 hr
Apr 19, 1:41 PM CDT	River Flood Warning	ABR	Codington	21 days
Apr 19, 11:17 AM CDT	River Flood Warning	ABR	Traverse	42 hr

Nearby

River Flood Warnings in South Dakota, 2019 Every river flood warning in 2019

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.