Alert archive / Iowa / River Flood Warnings in 2019

River Flood Warning 346, NWS Sioux Falls, SD

December 28, 2019Clay County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Dec 28, 2019, 10:10 AM CST for Clay County, Iowa. It took effect at Dec 30, 2019, 6:00 AM CST. It was in force for 63 hr.

The area

The counties it named.

The facts

Issued: Dec 28, 2019, 10:10 AM CST (16:10 UTC)
In effect from: Dec 30, 2019, 6:00 AM CST
Expired: Jan 1, 2020, 9:00 PM CST
In force: 63 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

County Clay County, IA

The radar

The Sioux Falls radar (KFSD), 139 km from the middle of the area, began a volume at 16:11 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 Little Sioux River at Spencer (SPWI4).

Action stage: 9 ft
Minor stage: 10 ft
Moderate stage: 14 ft
Major stage: 16 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 Dec 28, 5:36 AM CST, 4 hours 34 minutes earlier.

Area forecast discussion, Dec 28, 5:36 AM CST, 4 hours 34 minutes before

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Hazardous weather outlook, Dec 28, 4:36 AM CST, 5 hours 34 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
Dec 28, 3:41 AM CST	Winter Weather Advisory	FSD	Clay, Union	68 hr
Dec 28, 10:10 AM CST	River Flood Warning	FSD	Union	4 days
Dec 28, 10:10 AM CST	River Flood Warning	FSD	Clay, Dickinson	5 days
Dec 28, 3:41 AM CST	Ice Storm Warning	FSD	Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 1 more	11 hr

Nearby

River Flood Warnings in Iowa, 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.