Alert archive / South Dakota / Mesoscale Discussions in 2017

Mesoscale Discussion 1479

August 12, 201715 counties in Nebraska; 27 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2017, 1:36 PM MDT for 15 counties in Nebraska; 27 counties in South Dakota. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Aug 12, 2017, 1:36 PM MDT (19:36 UTC)
Expired: Aug 12, 2017, 3:30 PM MDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 42 counties

Arthur County, NE, Box Butte County, NE, Brown County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keya Paha County, NE, McPherson County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Thomas County, NE, Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Mellette County, SD, Oglala Lakota County, SD, Potter County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD

The radar

The North Platte radar (KLNX), 155 km from the middle of the area, began a volume at 19:38 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 449Aug 12, 3:00 PM MDT

The text

As transmitted.

<!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>

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 2:59 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Blaine, Box Butte, Brown, Chase and 28 more	7 hr
Aug 12, 5:16 PM MDT	Mesoscale Discussion	SPC	Arthur, Blaine, Box Butte, Brown, Chase, Cherry and 24 more	89 min
Aug 12, 4:46 PM MDT	Mesoscale Discussion	SPC	Campbell, Corson, Dewey, Edmunds, Harding, Perkins and 4 more	89 min

Nearby

Mesoscale Discussions in South Dakota, 2017 Mesoscale Discussions in Nebraska, 2017 Every mesoscale discussion in 2017

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.