Alert archive / Nebraska / Mesoscale Discussions in 2016

Mesoscale Discussion 1075

June 28, 20166 counties in Nebraska; Fall River County, South Dakota; Niobrara County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2016, 4:26 PM MDT for 6 counties in Nebraska; Fall River County, South Dakota; Niobrara County, Wyoming. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2016, 4:26 PM MDT (22:26 UTC)
Expired: Jun 28, 2016, 6:00 PM MDT
In force: 94 min
Issued by: the Storm Prediction Center

Counties Box Butte County, NE, Dawes County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Fall River County, SD, Niobrara County, WY

The radar

The Rapid City radar (KUDX), 195 km from the middle of the area, began a volume at 22:29 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 (KRAP), launched 12:00Z, 10.4 hours before the alert went out and 189 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: 306 J/kg
Mixed-layer CIN: -199 J/kg
Mixed-layer LCL: 1761 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 27, 6:44 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Kimball and 3 more	61 min
Jun 28, 12:55 PM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 15 more	95 min
Jun 28, 1:37 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Box Butte, Chase, Cherry, Cheyenne and 18 more	7 hr
Jun 28, 5:36 PM MDT	Mesoscale Discussion	SPC	Arthur, Box Butte, Dawes, Garden, Grant, Hooker and 1 more	24 min
Jun 28, 11:32 AM MDT	Mesoscale Discussion	SPC	Custer, Lawrence, Pennington	58 min

Nearby

Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in Wyoming, 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.