Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1456

June 22, 200324 counties in Nebraska; 33 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2003, 2:27 PM CDT for 24 counties in Nebraska; 33 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 22, 2003, 2:27 PM CDT (19:27 UTC)
Expired: Jun 22, 2003, 4:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 57 counties

Antelope County, NE, Boone County, NE, Boyd County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dixon County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Howard County, NE, Knox County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Sherman County, NE, Stanton County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Faulk County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 148 km from the middle of the area, began a volume at 19:28 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.5 hours before the alert went out and 221 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: 1248 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 719 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 29 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
Jun 21, 7:54 PM CDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boone, Boyd, Brown and 25 more	66 min
Jun 21, 8:15 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more	6 hr
Jun 21, 10:26 PM CDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Garfield, Holt, Keya Paha and 2 more	94 min
Jun 22, 1:27 AM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more	63 min
Jun 22, 4:38 AM CDT	Mesoscale Discussion	SPC	Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 5 more	97 min
Jun 22, 9:30 AM CDT	Mesoscale Discussion	SPC	Burt, Cass, Cuming, Dodge, Douglas, Gage and 10 more	3 hr
Jun 22, 3:35 PM CDT	Tornado Watch	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Burt and 57 more	5 hr
Jun 22, 5:29 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Clay, Fillmore, Greeley and 15 more	61 min
Jun 21, 9:13 PM CDT	Mesoscale Discussion	SPC	Brown, Day, Grant, Marshall, Roberts	92 min
Jun 22, 12:45 AM CDT	Mesoscale Discussion	SPC	Brown, Day, Edmunds, Grant, McPherson, Marshall and 1 more	60 min
Jun 22, 1:47 PM CDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Harding, Lawrence, Meade and 2 more	118 min
Jun 22, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	Butte, Corson, Custer, Dewey, Fall River, Haakon and 11 more	7 hr
Jun 22, 2:55 PM CDT	Tornado Watch	SPC	Beadle, Brookings, Brown, Clark, Codington, Day and 12 more	6 hr
Jun 22, 5:48 PM CDT	Mesoscale Discussion	SPC	Butte, Corson, Custer, Dewey, Haakon, Harding and 8 more	117 min
Jun 22, 5:59 PM CDT	Mesoscale Discussion	SPC	Beadle, Brookings, Clark, Codington, Day, Deuel and 5 more	61 min

Nearby

Mesoscale Discussions in South Dakota, 2003 Mesoscale Discussions in Nebraska, 2003 Every mesoscale discussion in 2003

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.