Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 1050

June 17, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2014, 10:18 PM CDT for 4 states. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Jun 17, 2014, 10:18 PM CDT (03:18 UTC)
Expired: Jun 17, 2014, 11:15 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center

All 35 counties

Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Cedar County, NE, Dakota County, NE, Dixon County, NE, Knox County, NE, Pierce County, NE, Thurston County, NE, Wayne County, NE, Bon Homme County, SD, Clay County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 64 km from the middle of the area, began a volume at 03:19 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.

Tornado Watch 319Jun 17, 11:35 PM CDT

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.3 hours before the alert went out and 210 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 4092 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1440 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 14.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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
Jun 17, 7:44 PM CDT	Mesoscale Discussion	SPC	Allamakee, Howard, Winneshiek	2 hr
Jun 17, 9:38 PM CDT	Mesoscale Discussion	SPC	Clinton, Jackson	97 min
Jun 17, 10:13 PM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Buchanan, Chickasaw, Clayton, Clinton, Delaware and 8 more	6 hr
Jun 17, 11:01 PM CDT	Mesoscale Discussion	SPC	Plymouth, Sioux	29 min
Jun 17, 11:23 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Hancock and 11 more	37 min
Jun 17, 11:39 PM CDT	Tornado Watch	SPC	Black Hawk, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 25 more	5 hr
Jun 18, 1:52 AM CDT	Mesoscale Discussion	SPC	Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 27 more	83 min
Jun 18, 3:07 AM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 11 more	53 min
Jun 18, 3:47 AM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo and 16 more	4 hr
Jun 18, 5:36 AM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Clayton and 12 more	54 min
Jun 18, 3:29 PM CDT	Mesoscale Discussion	SPC	Lyon, Plymouth, Sioux	91 min
Jun 18, 6:23 PM CDT	Tornado Watch	SPC	Lyon, Plymouth, Sioux, Woodbury	5 hr
Jun 17, 10:36 PM CDT	Mesoscale Discussion	SPC	Anoka, Blue Earth, Brown, Carver, Chisago, Dakota and 16 more	84 min
Jun 17, 8:29 PM CDT	Mesoscale Discussion	SPC	Cedar	31 min
Jun 17, 7:33 PM CDT	Mesoscale Discussion	SPC	Butte, Harding	27 min
Jun 17, 8:58 PM CDT	Severe Thunderstorm Watch	SPC	Butte, Custer, Fall River, Haakon, Harding, Lawrence and 4 more	5 hr
Jun 18, 1:19 AM CDT	Mesoscale Discussion	SPC	Butte, Corson, Custer, Dewey, Haakon, Lawrence and 4 more	56 min
Jun 18, 4:45 AM CDT	Mesoscale Discussion	SPC	Campbell, Corson, Dewey, Haakon, Hughes, Hyde and 10 more	90 min
Jun 18, 1:13 PM CDT	Mesoscale Discussion	SPC	Beadle, Brown, Campbell, Corson, Dewey, Edmunds and 10 more	92 min
Jun 18, 1:28 PM CDT	Tornado Watch	SPC	Buffalo, Campbell, Corson, Dewey, Edmunds, Faulk and 13 more	9 hr
Jun 18, 5:23 PM CDT	Mesoscale Discussion	SPC	Brown, Campbell, Edmunds, McPherson, Marshall, Walworth	97 min

Nearby

Mesoscale Discussions in South Dakota, 2014 Mesoscale Discussions in Iowa, 2014 Mesoscale Discussions in Nebraska, 2014 Every mesoscale discussion in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.