Alert archive / South Dakota / River Flood Warnings in 2018

River Flood Warning 181, NWS Sioux Falls, SD

July 20, 2018Brookings County, South Dakota

NWS Sioux Falls, SD issued this river flood warning at Jul 20, 2018, 12:45 AM CDT for Brookings County, South Dakota. It was in force for 69 hr.

The area

The counties it named.

The facts

Issued: Jul 20, 2018, 12:45 AM CDT (05:45 UTC)
Expired: Jul 22, 2018, 9:36 PM CDT
In force: 69 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Moderate

County Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 05:46 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 Medary Creek near Medary (MDYS2).

Action stage: 1587 ft
Minor stage: 1588 ft
Moderate stage: 1589 ft
Major stage: 1591 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, 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 Jul 19, 10:47 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, Jul 19, 10:47 PM CDT, 1 hour 58 minutes before

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Hazardous weather outlook, Jul 19, 10:19 PM CDT, 2 hours 26 minutes before

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<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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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:46 PM CDT	Areal Flood Warning	FSD	Brookings	12 hr

Nearby

River Flood Warnings in South Dakota, 2018 Every river flood warning in 2018

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.