Alert archive / South Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1182

June 17, 200710 counties in Nebraska; 28 counties in South Dakota; Weston County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2007, 5:56 PM MDT for 10 counties in Nebraska; 28 counties in South Dakota; Weston County, Wyoming. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 17, 2007, 5:56 PM MDT (23:56 UTC)
Expired: Jun 17, 2007, 7:30 PM MDT
In force: 94 min
Issued by: the Storm Prediction Center

All 39 counties

Arthur County, NE, Box Butte County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Morrill County, NE, Sheridan County, NE, Bennett County, SD, Brown County, SD, Buffalo County, SD, Butte County, SD, Campbell County, SD, Custer County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, McPherson County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Walworth County, SD, Ziebach County, SD, Weston County, WY

The radar

The Rapid City radar (KUDX), 110 km from the middle of the area, began a volume at 23:58 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

Rapid City, SD (KUNR), launched 12:00Z, 11.9 hours before the alert went out and 112 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: 389 J/kg
Mixed-layer CIN: -591 J/kg
Mixed-layer LCL: 2016 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 303 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
Jun 17, 2:53 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cherry, Garden, Grant, Hooker and 4 more	97 min
Jun 17, 3:01 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Box Butte, Cherry, Cheyenne, Dawes, Deuel and 8 more	7 hr
Jun 16, 9:38 PM MDT	Mesoscale Discussion	SPC	Butte, Custer, Harding, Jackson, Lawrence, Meade and 3 more	97 min
Jun 17, 3:08 PM MDT	Severe Thunderstorm Watch	SPC	Butte, Custer, Fall River, Haakon, Harding, Lawrence and 4 more	6 hr
Jun 17, 3:44 PM MDT	Mesoscale Discussion	SPC	Brown, Campbell, Edmunds, Faulk, Hand, Hughes and 6 more	91 min
Jun 17, 4:02 PM MDT	Severe Thunderstorm Watch	SPC	Brown, Buffalo, Campbell, Corson, Dewey, Edmunds and 12 more	7 hr
Jun 16, 6:59 PM MDT	Mesoscale Discussion	SPC	Campbell, Crook, Johnson, Sheridan, Weston	91 min

Nearby

Mesoscale Discussions in South Dakota, 2007 Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in Wyoming, 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.