Alert archive / South Dakota / River Flood Warnings in 2019

River Flood Warning 125, NWS Sioux Falls, SD

April 7, 2019Clay County, South Dakota

NWS Sioux Falls, SD issued this river flood warning at Apr 7, 2019, 10:03 AM CDT for Clay County, South Dakota. It took effect at Apr 8, 2019, 9:00 AM CDT. It was in force for 19 days.

The area

The counties it named.

The facts

Issued: Apr 7, 2019, 10:03 AM CDT (15:03 UTC)
In effect from: Apr 8, 2019, 9:00 AM CDT
Expired: Apr 27, 2019, 10:21 AM CDT
In force: 19 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Major

County Clay County, SD

The radar

The Sioux Falls radar (KFSD), 77 km from the middle of the area, began a volume at 15:06 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 Vermillion River near Wakonda (WKAS2).

Action stage: 13 ft
Minor stage: 14 ft
Moderate stage: 15.5 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06479000, 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 Apr 7, 6:33 AM CDT, 3 hours 30 minutes earlier.

Area forecast discussion, Apr 7, 6:33 AM CDT, 3 hours 30 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>

Hazardous weather outlook, Apr 7, 4:39 AM CDT, 5 hours 24 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
Apr 7, 12:01 AM CDT	River Flood Warning	FSD	Rock	21 days

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.