Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1579

July 25, 2007Emmons County, Kidder County, Logan County, North Dakota; Campbell County, Dewey County, Walworth County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2007, 7:24 PM CDT for Emmons County, Kidder County, Logan County, North Dakota; Campbell County, Dewey County, Walworth County, South Dakota. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 25, 2007, 7:24 PM CDT (00:24 UTC)
Expired: Jul 25, 2007, 9:00 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Emmons County, ND, Kidder County, ND, Logan County, ND, Campbell County, SD, Dewey County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 119 km from the middle of the area, began a volume at 00:24 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 00:00Z, 0.4 hours before the alert went out and 117 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: 2786 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 2015 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

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 25, 8:59 PM CDT	Mesoscale Discussion	SPC	Benson, Cavalier, Eddy, Foster, Grand Forks, Griggs and 10 more	2 hr
Jul 25, 11:24 PM CDT	Mesoscale Discussion	SPC	Benson, Cavalier, Eddy, Foster, Grand Forks, Griggs and 10 more	96 min
Jul 26, 2:58 PM CDT	Mesoscale Discussion	SPC	Aurora, Bon Homme, Brookings, Brule, Charles Mix, Clay and 17 more	92 min

Nearby

Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in South Dakota, 2007 Every mesoscale discussion in 2007

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.