Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 1109

June 21, 2014Cherry County, Grant County, Hooker County, Nebraska; 4 counties in North Dakota; 23 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2014, 4:49 PM MDT for Cherry County, Grant County, Hooker County, Nebraska; 4 counties in North Dakota; 23 counties in South Dakota. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Jun 21, 2014, 4:49 PM MDT (22:49 UTC)
Expired
Jun 21, 2014, 6:15 PM MDT
In force
86 min
Issued by
the Storm Prediction Center
All 30 counties

Dickey County, ND, LaMoure County, ND, Ransom County, ND, Sargent County, ND, Cherry County, NE, Grant County, NE, Hooker County, NE, Bennett County, SD, Brown County, SD, Buffalo County, SD, Campbell County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Mellette 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 Aberdeen radar (KABR), 188 km from the middle of the area, began a volume at 22:49 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.8 hours before the alert went out and 156 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2014-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2014-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2250 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

IssuedProductOfficeCountiesLasted
Jun 20, 6:05 PM MDTMesoscale DiscussionSPCAdams, Arthur, Blaine, Brown, Buffalo, Chase and 36 more85 min
Jun 20, 7:29 PM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Burt, Butler and 55 more91 min
Jun 20, 7:51 PM MDTSevere Thunderstorm WatchSPCAdams, Antelope, Boone, Buffalo, Butler, Cass and 41 more6 hr
Jun 20, 10:28 PM MDTMesoscale DiscussionSPCAdams, Burt, Butler, Cass, Clay, Colfax and 29 more92 min
Jun 21, 12:57 AM MDTMesoscale DiscussionSPCAdams, Buffalo, Cass, Clay, Dawson, Fillmore and 20 more63 min
Jun 21, 1:23 PM MDTMesoscale DiscussionSPCBox Butte, Dawes, Garden, Morrill, Scotts Bluff, Sheridan and 1 more67 min
Jun 21, 1:56 PM MDTSevere Thunderstorm WatchSPCArthur, Banner, Box Butte, Brown, Cherry, Cheyenne and 14 more7 hr
Jun 21, 2:43 PM MDTMesoscale DiscussionSPCDundy2 hr
Jun 21, 2:10 PM MDTMesoscale DiscussionSPCBarnes, Burleigh, Cass, Dickey, Eddy, Emmons and 15 more65 min
Jun 21, 2:37 PM MDTSevere Thunderstorm WatchSPCBarnes, Cass, Dickey, Grand Forks, Griggs, LaMoure and 8 more6 hr

Nearby

Mesoscale Discussions in South Dakota, 2014Mesoscale Discussions in North Dakota, 2014Mesoscale Discussions in Nebraska, 2014Every 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.