Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 1383

July 12, 201519 counties in Minnesota; 19 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2015, 8:16 PM CDT for 19 counties in Minnesota; 19 counties in North Dakota. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jul 12, 2015, 8:16 PM CDT (01:16 UTC)
Expired: Jul 12, 2015, 9:15 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center

All 38 counties

Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Benson County, ND, Cass County, ND, Cavalier County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 73 km from the middle of the area, began a volume at 01:19 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

International Fa, MN (KINL), launched 00:00Z, 1.3 hours before the alert went out and 258 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: 2205 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.0

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 12, 7:51 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 45 more	114 min
Jul 12, 9:03 PM CDT	Mesoscale Discussion	SPC	Fillmore, Houston, Winona	117 min
Jul 12, 9:41 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 32 more	94 min
Jul 12, 9:59 PM CDT	Severe Thunderstorm Watch	SPC	Anoka, Blue Earth, Carver, Chisago, Dakota, Dodge and 26 more	6 hr
Jul 12, 11:55 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 30 more	95 min
Jul 13, 2:00 AM CDT	Mesoscale Discussion	SPC	Houston	2 hr
Jul 13, 1:51 PM CDT	Mesoscale Discussion	SPC	Anoka, Chisago, Dakota, Goodhue, Ramsey, Wabasha and 2 more	84 min
Jul 13, 3:11 PM CDT	Severe Thunderstorm Watch	SPC	Dodge, Fillmore, Goodhue, Houston, Olmsted, Wabasha and 1 more	6 hr
Jul 13, 6:09 PM CDT	Mesoscale Discussion	SPC	Houston, Wabasha, Winona	66 min

Nearby

Mesoscale Discussions in Minnesota, 2015 Mesoscale Discussions in North 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.