Alert archive / Minnesota / Mesoscale Discussions in 2018

Mesoscale Discussion 1020

July 8, 201828 counties in Minnesota; 7 counties in North Dakota; 5 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2018, 5:46 PM CDT for 28 counties in Minnesota; 7 counties in North Dakota; 5 counties in South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Jul 8, 2018, 5:46 PM CDT (22:46 UTC)
Expired
Jul 8, 2018, 7:45 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
All 40 counties

Aitkin County, MN, Becker County, MN, Benton County, MN, Big Stone County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Kanabec County, MN, Lake County, MN, Mahnomen County, MN, Mille Lacs County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pope County, MN, Saint Louis County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, LaMoure County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Brown County, SD, Day County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 167 km from the middle of the area, began a volume at 22:45 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, 10.8 hours before the alert went out and 241 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 2018-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1150 joules per kilogram.LCLLFCEL10008507005003002001001 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 2018-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 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
1150 J/kg
Mixed-layer CIN
-332 J/kg
Mixed-layer LCL
1241 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
232 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.

IssuedProductOfficeCountiesLasted
Jul 8, 2:35 AM CDTMesoscale DiscussionSPCBeltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Norman and 4 more85 min
Jul 8, 3:14 AM CDTSevere Thunderstorm WatchSPCBeltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more5 hr
Jul 8, 5:30 AM CDTMesoscale DiscussionSPCBeltrami, Clearwater, Itasca, Kittson, Koochiching, Lake of the Woods and 5 more90 min
Jul 8, 6:59 AM CDTSevere Thunderstorm WatchSPCCook, Itasca, Koochiching, Lake, Saint Louis4 hr
Jul 8, 9:23 AM CDTMesoscale DiscussionSPCCook, Lake, Saint Louis97 min
Jul 8, 1:16 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 4 more2 hr
Jul 8, 3:52 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Big Stone, Carlton, Cass, Clay and 15 more7 hr
Jul 7, 8:55 PM CDTMesoscale DiscussionSPCAdams, Bowman, Burleigh, Emmons, Foster, Grant and 8 more65 min
Jul 7, 9:41 PM CDTSevere Thunderstorm WatchSPCAdams, Bowman, Burleigh, Dunn, Emmons, Foster and 14 more7 hr
Jul 7, 11:44 PM CDTMesoscale DiscussionSPCAdams, Barnes, Burleigh, Eddy, Emmons, Foster and 12 more2 hr

Nearby

Mesoscale Discussions in Minnesota, 2018Mesoscale Discussions in North Dakota, 2018Mesoscale Discussions in South Dakota, 2018Every 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.