Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1578

July 25, 2007Kittson County, Marshall County, Roseau County, Minnesota; 12 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2007, 5:06 PM CDT for Kittson County, Marshall County, Roseau County, Minnesota; 12 counties in North Dakota. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jul 25, 2007, 5:06 PM CDT (22:06 UTC)
Expired: Jul 25, 2007, 6:30 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Kittson County, MN, Marshall County, MN, Roseau County, MN, Benson 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, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 75 km from the middle of the area, began a volume at 22:06 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 552Jul 25, 6:15 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.1 hours before the alert went out and 272 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: 1716 J/kg
Mixed-layer CIN: -323 J/kg
Mixed-layer LCL: 1953 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: -42 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 24, 9:36 PM CDT	Mesoscale Discussion	SPC	Chippewa, Lac qui Parle, Lincoln, Lyon, Murray, Redwood and 2 more	54 min
Jul 25, 6:25 PM CDT	Severe Thunderstorm Watch	SPC	Beltrami, Clearwater, Kittson, Lake of the Woods, Mahnomen, Marshall and 5 more	7 hr

Nearby

Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in Minnesota, 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.