Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 2134

September 3, 200528 counties in Minnesota; Richland County, North Dakota; Grant County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Sep 3, 2005, 1:40 PM CDT for 28 counties in Minnesota; Richland County, North Dakota; Grant County, Roberts County, South Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Sep 3, 2005, 1:40 PM CDT (18:40 UTC)
Expired: Sep 3, 2005, 3:15 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 31 counties

Big Stone County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Douglas County, MN, Grant County, MN, Hennepin County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Nicollet County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Wright County, MN, Yellow Medicine County, MN, Richland County, ND, Grant County, SD, Roberts County, SD

The radar

The Minneapolis radar (KMPX), 135 km from the middle of the area, began a volume at 18:41 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 764Sep 3, 2:20 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 6.7 hours before the alert went out and 247 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: 713 J/kg
Mixed-layer CIN: -297 J/kg
Mixed-layer LCL: 1214 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
Sep 3, 4:00 AM CDT	Mesoscale Discussion	SPC	Clay, Grant, Norman, Traverse, Wilkin	3 hr
Sep 3, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Carver, Chippewa, Dakota, Douglas and 24 more	6 hr
Sep 3, 5:11 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 25 more	64 min
Sep 3, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	Dodge, Fillmore, Goodhue, Houston, Mower, Olmsted and 2 more	3 hr
Sep 3, 6:46 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Dakota, Douglas and 24 more	89 min
Sep 2, 7:25 PM CDT	Mesoscale Discussion	SPC	Adams, Grant, Hettinger, Sioux	65 min

Nearby

Mesoscale Discussions in Minnesota, 2005 Mesoscale Discussions in South Dakota, 2005 Mesoscale Discussions in North Dakota, 2005 Every mesoscale discussion in 2005

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.