Alert archive / Iowa / River Flood Warnings in 2019

River Flood Warning 235, NWS Sioux Falls, SD

July 2, 2019Union County, South Dakota; Plymouth County, Sioux County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Jul 2, 2019, 7:40 AM CDT for Union County, South Dakota; Plymouth County, Sioux County, Iowa. It was in force for 7 days.

The area

The counties it named.

The facts

Issued: Jul 2, 2019, 7:40 AM CDT (12:40 UTC)
Expired: Jul 9, 2019, 10:02 AM CDT
In force: 7 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

Counties Plymouth County, IA, Sioux County, IA, Union County, SD

The radar

The Sioux Falls radar (KFSD), 84 km from the middle of the area, began a volume at 12:39 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 above Hawarden (HWDI4). The gauge peaked at 23.50 ft at Jul 6, 2019, 4:00 PM CDT.

Action stage: 18.5 ft
Minor stage: 20.5 ft
Moderate stage: 24 ft
Major stage: 30 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06483950, 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 2, 5:56 AM CDT, 1 hour 44 minutes earlier.

Area forecast discussion, Jul 2, 5:56 AM CDT, 1 hour 44 minutes before

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Hazardous weather outlook, Jul 2, 5:49 AM CDT, 1 hour 51 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
Jul 1, 9:28 PM CDT	Flash Flood Warning	FSD	Union	3 hr
Jul 2, 10:04 AM CDT	River Flood Warning	FSD	Brookings, Moody	34 days
Jul 1, 7:16 PM CDT	Flash Flood Warning	FSD	Sioux	3 hr
Jul 1, 7:33 PM CDT	Flash Flood Warning	FSD	O'Brien	2 hr
Jul 1, 8:17 PM CDT	Flash Flood Warning	FSD	Cherokee, Plymouth, Sioux	3 hr
Jul 1, 11:01 PM CDT	River Flood Warning	FSD	Lyon	3 days
Jul 1, 11:01 PM CDT	River Flood Warning	FSD	Sioux	21 days
Jul 1, 11:01 PM CDT	River Flood Warning	FSD	Sioux	22 hr
Jul 2, 3:46 AM CDT	River Flood Warning	FSD	Plymouth, Sioux	48 hr

Nearby

River Flood Warnings in Iowa, 2019 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.