Alert archive / South Dakota / Mesoscale Discussions in 2006

Mesoscale Discussion 362

March 30, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2006, 12:03 PM CST for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2006, 12:03 PM CST (18:03 UTC)
Expired: Mar 30, 2006, 2:00 PM CST
In force: 117 min
Issued by: the Storm Prediction Center

All 37 counties

Cherokee County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Nobles County, MN, Pipestone County, MN, Rock County, MN, Burt County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Bon Homme County, SD, Brookings County, SD, Clay County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 72 km from the middle of the area, began a volume at 18:06 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.

Tornado Watch 111Mar 30, 2:15 PM CST

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.1 hours before the alert went out and 184 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: 34 J/kg
Mixed-layer CIN: -342 J/kg
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 310 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
Mar 30, 7:29 AM CST	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 25 more	2 hr
Mar 30, 1:22 PM CST	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 35 more	113 min
Mar 30, 2:15 PM CST	Tornado Watch	SPC	Adair, Adams, Audubon, Boone, Carroll, Cass and 20 more	8 hr
Mar 30, 5:42 PM CST	Mesoscale Discussion	SPC	Appanoose, Benton, Black Hawk, Bremer, Butler, Cerro Gordo and 27 more	93 min
Mar 30, 5:58 PM CST	Severe Thunderstorm Watch	SPC	Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 51 more	6 hr
Mar 30, 2:58 AM CST	Mesoscale Discussion	SPC	Adams, Buffalo, Custer, Dawson, Franklin, Frontier and 11 more	2 hr
Mar 30, 3:39 AM CST	Severe Thunderstorm Watch	SPC	Adams, Boone, Buffalo, Butler, Clay, Colfax and 30 more	5 hr
Mar 30, 8:42 AM CST	Tornado Watch	SPC	Adams, Buffalo, Butler, Cass, Clay, Dawson and 31 more	9 hr
Mar 30, 11:47 AM CST	Mesoscale Discussion	SPC	Adams, Clay, Fillmore, Jefferson, Nuckolls, Thayer and 1 more	88 min
Mar 30, 3:12 PM CST	Mesoscale Discussion	SPC	Cass, Clay, Fillmore, Gage, Jefferson, Johnson and 11 more	63 min

Nearby

Mesoscale Discussions in South Dakota, 2006 Mesoscale Discussions in Nebraska, 2006 Mesoscale Discussions in Iowa, 2006 Every mesoscale discussion in 2006

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.