Alert archive / North Dakota / Mesoscale Discussions in 2018

Mesoscale Discussion 1356

August 25, 20188 counties in Minnesota; 10 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2018, 10:08 PM CDT for 8 counties in Minnesota; 10 counties in North Dakota. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Aug 25, 2018, 10:08 PM CDT (03:08 UTC)
Expired: Aug 25, 2018, 11:45 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Becker County, MN, Clay County, MN, Douglas County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Stutsman County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 92 km from the middle of the area, began a volume at 03:11 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, 3.1 hours before the alert went out and 216 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: 1597 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1508 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.2

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
Aug 26, 2:46 AM CDT	Mesoscale Discussion	SPC	Becker, Benton, Clay, Crow Wing, Douglas, Kanabec and 6 more	2 hr
Aug 26, 9:53 AM CDT	Mesoscale Discussion	SPC	Jackson, Nobles	2 hr
Aug 26, 11:56 AM CDT	Mesoscale Discussion	SPC	Becker, Cass, Clay, Crow Wing, Douglas, Grant and 6 more	109 min
Aug 26, 1:42 PM CDT	Mesoscale Discussion	SPC	Big Stone, Grant, Lac qui Parle, Stevens, Traverse	3 hr
Aug 26, 5:14 PM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Cass, Crow Wing	2 hr
Aug 26, 6:15 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 10 more	3 hr
Aug 26, 5:42 AM CDT	Mesoscale Discussion	SPC	Dickey, Emmons, LaMoure, Logan, McIntosh, Sioux	3 hr
Aug 26, 3:52 PM CDT	Mesoscale Discussion	SPC	Burke, Divide, McKenzie, Mountrail, Renville, Ward and 1 more	113 min

Nearby

Mesoscale Discussions in North Dakota, 2018 Mesoscale Discussions in Minnesota, 2018 Every mesoscale discussion in 2018

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.