Alert archive / Iowa / Mesoscale Discussions in 2016

Mesoscale Discussion 1093

June 29, 201614 counties in Iowa; 12 counties in Nebraska; 10 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2016, 5:36 PM CDT for 14 counties in Iowa; 12 counties in Nebraska; 10 counties in South Dakota. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jun 29, 2016, 5:36 PM CDT (22:36 UTC)
Expired: Jun 29, 2016, 7:30 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 36 counties

Cherokee County, IA, Crawford County, IA, Fremont County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Plymouth County, IA, Pottawattamie County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Burt County, NE, Cass County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Sarpy County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Clay County, SD, Davison County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 97 km from the middle of the area, began a volume at 22:38 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

Omaha, NE (KOAX), launched 12:00Z, 10.6 hours before the alert went out and 158 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: 353 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 963 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!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 28, 7:13 PM CDT	Mesoscale Discussion	SPC	Chase, Dawson, Dundy, Franklin, Frontier, Furnas and 7 more	2 hr
Jun 28, 7:27 PM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Deuel, Dundy, Frontier, Garden and 9 more	63 min
Jun 28, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Brown, Buffalo, Chase, Custer and 25 more	7 hr
Jun 28, 9:44 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Lincoln and 1 more	61 min
Jun 29, 3:52 PM CDT	Mesoscale Discussion	SPC	Banner, Cheyenne, Deuel, Kimball, Scotts Bluff	53 min
Jun 29, 1:13 PM CDT	Mesoscale Discussion	SPC	Corson, Harding, Perkins	92 min
Jun 29, 1:47 PM CDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Lawrence, Meade, Oglala Lakota and 1 more	88 min
Jun 29, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Haakon, Harding, Jackson, Lawrence and 8 more	5 hr
Jun 29, 5:15 PM CDT	Mesoscale Discussion	SPC	Butte, Dewey, Haakon, Jackson, Jones, Meade and 6 more	2 hr

Nearby

Mesoscale Discussions in Iowa, 2016 Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in South Dakota, 2016 Every mesoscale discussion in 2016

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.