Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 802

June 3, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2014, 5:40 PM MDT for 4 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2014, 5:40 PM MDT (23:40 UTC)
Expired: Jun 3, 2014, 6:45 PM MDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Carter County, MT, Powder River County, MT, Dawes County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Pennington County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Niobrara County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 155 km from the middle of the area, began a volume at 23:40 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

Rapid City, SD (KRAP), launched 12:00Z, 11.7 hours before the alert went out and 150 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: 1105 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

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 3, 12:51 PM MDT	Mesoscale Discussion	SPC	Carter, Custer, Fallon, Powder River	114 min
Jun 3, 1:37 PM MDT	Severe Thunderstorm Watch	SPC	Carter, Powder River	6 hr
Jun 3, 1:40 PM MDT	Mesoscale Discussion	SPC	Blaine, Daniels, Dawson, Fergus, Garfield, McCone and 7 more	2 hr
Jun 3, 2:02 AM MDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Grant, Hooker, Keya Paha and 6 more	118 min
Jun 3, 6:00 AM MDT	Mesoscale Discussion	SPC	Blaine, Brown, Garfield, Greeley, Holt, Howard and 6 more	2 hr
Jun 3, 8:36 AM MDT	Severe Thunderstorm Watch	SPC	Boyd, Brown, Cherry, Holt, Keya Paha, Rock and 2 more	7 hr
Jun 3, 11:07 AM MDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Cedar and 15 more	83 min
Jun 3, 12:12 PM MDT	Tornado Watch	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 55 more	10 hr
Jun 3, 12:20 PM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more	85 min
Jun 3, 2:11 PM MDT	Tornado Watch	SPC	Arthur, Box Butte, Cherry, Deuel, Garden, Grant and 10 more	7 hr
Jun 3, 2:48 PM MDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Butler, Colfax, Cuming and 18 more	87 min
Jun 3, 3:37 PM MDT	Mesoscale Discussion	SPC	Cass, Douglas, Nemaha, Sarpy, Washington	83 min
Jun 3, 3:54 PM MDT	Mesoscale Discussion	SPC	Adams, Blaine, Boone, Buffalo, Butler, Clay and 36 more	96 min
Jun 3, 4:59 PM MDT	Tornado Watch	SPC	Adams, Blaine, Boone, Buffalo, Butler, Cass and 43 more	7 hr

Nearby

Mesoscale Discussions in South Dakota, 2014 Mesoscale Discussions in Wyoming, 2014 Mesoscale Discussions in Montana, 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.