Alert archive / South Dakota / Mesoscale Discussions in 2017

Mesoscale Discussion 984

June 11, 2017Lincoln County, Lyon County, Pipestone County, Minnesota; 8 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2017, 4:00 AM CDT for Lincoln County, Lyon County, Pipestone County, Minnesota; 8 counties in South Dakota. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2017, 4:00 AM CDT (09:00 UTC)
Expired: Jun 11, 2017, 5:00 AM CDT
In force: 60 min
Issued by: the Storm Prediction Center

Counties Lincoln County, MN, Lyon County, MN, Pipestone County, MN, Beadle County, SD, Brookings County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Miner County, SD, Moody County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 107 km from the middle of the area, began a volume at 09:02 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 9.0 hours before the alert went out and 92 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2888 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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
Jun 11, 2:02 AM CDT	Mesoscale Discussion	SPC	Big Stone, Brown, Carver, Chippewa, Kandiyohi, Lac qui Parle and 15 more	58 min
Jun 11, 2:37 AM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Brown, Chippewa, Cottonwood, Kandiyohi, Lac qui Parle and 10 more	5 hr
Jun 11, 5:51 AM CDT	Mesoscale Discussion	SPC	Anoka, Brown, Carver, Chisago, Dakota, Goodhue and 16 more	84 min
Jun 11, 6:28 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Blue Earth, Carver, Chisago, Dakota and 26 more	6 hr
Jun 11, 9:30 AM CDT	Mesoscale Discussion	SPC	Anoka, Chisago, Dakota, Dodge, Fillmore, Goodhue and 10 more	60 min
Jun 11, 6:20 PM CDT	Mesoscale Discussion	SPC	Chisago, Dakota, Dodge, Goodhue, Olmsted, Ramsey and 3 more	2 hr
Jun 10, 9:44 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brule, Buffalo, Butte, Custer and 22 more	2 hr
Jun 10, 10:01 PM CDT	Severe Thunderstorm Watch	SPC	Buffalo, Butte, Custer, Dewey, Edmunds, Faulk and 17 more	7 hr
Jun 10, 11:56 PM CDT	Mesoscale Discussion	SPC	Brule, Buffalo, Butte, Custer, Dewey, Edmunds and 17 more	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2017 Mesoscale Discussions in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.