Alert archive / Iowa / River Flood Warnings in 2019

River Flood Warning 327, NWS Sioux Falls, SD

October 3, 2019Union County, South Dakota; Plymouth County, Sioux County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Oct 3, 2019, 10:26 AM CDT for Union County, South Dakota; Plymouth County, Sioux County, Iowa. It took effect at Oct 3, 2019, 7:00 PM CDT. It was in force for 7 days.

The area

The counties it named.

The facts

Issued: Oct 3, 2019, 10:26 AM CDT (15:26 UTC)
In effect from: Oct 3, 2019, 7:00 PM CDT
Expired: Oct 10, 2019, 7:44 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 15:31 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).

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 Oct 3, 5:51 AM CDT, 4 hours 35 minutes earlier.

Area forecast discussion, Oct 3, 5:51 AM CDT, 4 hours 35 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, Oct 3, 4:14 AM CDT, 6 hours 12 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
414 AM CDT Thu Oct 3 2019

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ040-055-056-062-067-070-071-040915-
Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Brookings-Lake-Moody-Minnehaha-Union-
414 AM CDT Thu Oct 3 2019

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, east central South
Dakota and southeast South Dakota.

.DAY ONE...Today and tonight.

Patchy frost is possible across the area late tonight into Friday
morning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Locally heavy rain may occur over parts of the area late Friday
night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

SDZ038-039-050-052>054-057>061-063>066-068-069-040915-
Beadle-Kingsbury-Gregory-Jerauld-Sanborn-Miner-Brule-Aurora-Davison-
Hanson-McCook-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-
Yankton-
414 AM CDT Thu Oct 3 2019

This Hazardous Weather Outlook is for central South Dakota, east
central South Dakota, south central South Dakota and southeast
South Dakota.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 2, 8:30 PM CDT	River Flood Warning	FSD	Brookings, Moody	7 days
Oct 3, 10:26 AM CDT	River Flood Warning	FSD	Minnehaha, Moody	3 days
Oct 3, 10:26 AM CDT	River Flood Warning	FSD	Minnehaha	4 days
Oct 3, 3:19 PM CDT	Frost Advisory	FSD	Aurora, Beadle, Brookings, Clay, Davison, Douglas and 14 more	18 hr
Oct 3, 10:26 AM CDT	River Flood Warning	FSD	Clay, Dickinson	7 days
Oct 3, 10:26 AM CDT	River Flood Warning	FSD	Clay	7 days

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.