Much of the James River basin received from one to two inches of liquid equivalent in the week leading up to the flooding, including snow melt moisture from the historic blizzard on April 14.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FSD wrote it up.
Much of the James River basin received from one to two inches of liquid equivalent in the week leading up to the flooding, including snow melt moisture from the historic blizzard on April 14.
The local office's own words before the first event, 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 the first event at Apr 22, 1:24 PM CST, 2 hours 36 minutes earlier.
<!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 National Weather Service Sioux Falls SD 348 AM CDT Sun Apr 22 2018 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-230900- Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln MN-Lyon MN-Murray-Cottonwood- Nobles-Jackson-Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury- Brookings-Gregory-Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora- Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas-Hutchinson- Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union- 348 AM CDT Sun Apr 22 2018 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, 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...Monday through Saturday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
The national radar mosaic for the moment the first event began.
7 flood. Local standard time, as filed.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which impacted lowland agricultural areas. River levels reached 0.7 feet above flood stage on the James River near Forestburg (gage site FORS2) on April 24.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which impacted lowland agricultural areas. River levels reached 2.6 feet above flood stage on the James River at Mitchell (gage site JRMS2) on April 26.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which impacted lowland agricultural areas. River levels reached 2.6 feet above flood stage on the James River at Mitchell (gage site JRMS2) on April 26.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which impacted lowland agricultural areas. River levels reached 2.6 feet above flood stage on the James River at Mitchell (gage site JRMS2) on April 26.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which impacted lowland agricultural areas. River levels reached 2.6 feet above flood stage on the James River at Mitchell (gage site JRMS2) on April 26.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which produced impacts to lowland agricultural areas. River levels reached 0.2 feet above flood stage on Firesteel Creek near Mt. Vernon (gage site MTVS2) on April 23.
Snow melt and runoff from periods of heavier rainfall produced minor flooding which produced impacts to lowland agricultural areas. River levels reached 0.2 feet above flood stage on Firesteel Creek near Mt. Vernon (gage site MTVS2) on April 23.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2018Every state in 2018This day in weather historyWarnings in South Dakota, April 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 772139, 772140, 772141, 772142, 772143, 772137, 772138.