Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1903

August 27, 2007Wilkin County, Minnesota; Ransom County, Richland County, Sargent County, North Dakota; Marshall County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2007, 7:10 AM CDT for Wilkin County, Minnesota; Ransom County, Richland County, Sargent County, North Dakota; Marshall County, Roberts County, South Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Aug 27, 2007, 7:10 AM CDT (12:10 UTC)
Expired
Aug 27, 2007, 8:45 AM CDT
In force
95 min
Issued by
the Storm Prediction Center

Counties Wilkin County, MN, Ransom County, ND, Richland County, ND, Sargent County, ND, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 103 km from the middle of the area, began a volume at 12:13 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

Aberdeen, SD (KABR), launched 12:00Z, 0.2 hours before the alert went out and 149 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2007-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3393 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2007-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3393 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
503 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
267 m²/s²
Significant tornado parameter
3.1
Supercell composite
12.0

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.

IssuedProductOfficeCountiesLasted
Aug 26, 8:04 PM CDTMesoscale DiscussionSPCKittson, Marshall, Pennington, Polk, Red Lake, Roseau116 min
Aug 26, 10:25 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Koochiching, Mahnomen and 4 more65 min
Aug 27, 1:43 AM CDTMesoscale DiscussionSPCAnoka, Chisago, Dakota, Dodge, Fillmore, Goodhue and 12 more92 min
Aug 27, 10:14 AM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Itasca and 8 more91 min
Aug 27, 12:55 PM CDTMesoscale DiscussionSPCBecker, Clay, Mahnomen, Norman, Otter Tail, Wilkin65 min
Aug 27, 2:29 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 15 more8 hr
Aug 27, 5:34 PM CDTMesoscale DiscussionSPCAitkin, Becker, Carlton, Cass, Clay, Clearwater and 8 more116 min
Aug 27, 6:19 PM CDTSevere Thunderstorm WatchSPCCarlton, Cook, Lake, Pine, Saint Louis7 hr
Aug 26, 11:07 PM CDTMesoscale DiscussionSPCAdams, Burleigh, Emmons, Grant, Hettinger, Kidder and 2 more113 min
Aug 27, 3:02 AM CDTMesoscale DiscussionSPCDickey, Emmons, LaMoure, Logan, McIntosh, Ransom and 2 more88 min
Aug 27, 3:14 AM CDTSevere Thunderstorm WatchSPCBarnes, Burleigh, Cass, Dickey, Emmons, Griggs and 10 more7 hr

Nearby

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