Alert archive / North Dakota / Mesoscale Discussions in 2015

Mesoscale Discussion 1300

July 4, 201528 counties in North Dakota; Campbell County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2015, 6:49 PM CDT for 28 counties in North Dakota; Campbell County, South Dakota. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jul 4, 2015, 6:49 PM CDT (23:49 UTC)
Expired: Jul 4, 2015, 8:45 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

All 29 counties

Barnes County, ND, Benson County, ND, Burleigh County, ND, Cavalier County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Walsh County, ND, Wells County, ND, Campbell County, SD

The radar

The Bismarck radar (KBIS), 61 km from the middle of the area, began a volume at 23:52 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.8 hours before the alert went out and 57 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: 170 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1395 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 33 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.

Issued	Product	Office	Counties	Lasted
Jul 4, 1:43 PM CDT	Mesoscale Discussion	SPC	Billings, Bottineau, Burke, Burleigh, Divide, Dunn and 12 more	2 hr
Jul 4, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	Billings, Bottineau, Burke, Divide, Dunn, Golden Valley and 10 more	7 hr
Jul 4, 5:18 PM CDT	Mesoscale Discussion	SPC	Bennett, Custer, Fall River, Haakon, Jackson, Oglala Lakota and 1 more	117 min

Nearby

Mesoscale Discussions in North Dakota, 2015 Mesoscale Discussions in South Dakota, 2015 Every mesoscale discussion in 2015

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.