Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 1686

July 15, 200414 counties in Minnesota; Pembina County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2004, 12:28 PM CDT for 14 counties in Minnesota; Pembina County, North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 15, 2004, 12:28 PM CDT (17:28 UTC)
Expired: Jul 15, 2004, 2:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Beltrami County, MN, Cass County, MN, Clearwater County, MN, Hubbard County, MN, Itasca County, MN, Kittson County, MN, Koochiching County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Pembina County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 166 km from the middle of the area, began a volume at 17:29 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 12:00Z, 5.5 hours before the alert went out and 156 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: 19 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1406 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 50 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 15, 5:41 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 44 more	94 min
Jul 15, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Becker, Benton, Big Stone, Blue Earth and 44 more	5 hr
Jul 14, 9:39 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Burke, Divide, Dunn and 15 more	96 min
Jul 14, 11:25 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Benson, Billings, Bottineau, Burke, Burleigh and 30 more	6 hr
Jul 15, 2:37 AM CDT	Mesoscale Discussion	SPC	Burleigh, Emmons, Grant, Kidder, Morton, Sheridan and 2 more	53 min

Nearby

Mesoscale Discussions in Minnesota, 2004 Mesoscale Discussions in North Dakota, 2004 Every mesoscale discussion in 2004

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.