Alert archive / South Dakota / Mesoscale Discussions in 2019

Mesoscale Discussion 978

June 4, 20195 counties in North Dakota; 11 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2019, 3:33 PM CDT for 5 counties in North Dakota; 11 counties in South Dakota. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Jun 4, 2019, 3:33 PM CDT (20:33 UTC)
Expired: Jun 4, 2019, 5:30 PM CDT
In force: 117 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Dickey County, ND, LaMoure County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Beadle County, SD, Brown County, SD, Clark County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hyde County, SD, Marshall County, SD, McPherson County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 4 km from the middle of the area, began a volume at 20:36 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 12:00Z, 8.6 hours before the alert went out and 62 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: 1015 J/kg
Mixed-layer CIN: -261 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 160 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 4, 11:44 AM CDT	Mesoscale Discussion	SPC	Brookings, Codington, Day, Deuel, Grant, Hamlin and 1 more	3 hr
Jun 4, 1:59 PM CDT	Mesoscale Discussion	SPC	Bennett, Jackson	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2019 Mesoscale Discussions in North Dakota, 2019 Every mesoscale discussion 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.