Alert archive / Nebraska / Mesoscale Discussions in 2018

Mesoscale Discussion 384

May 10, 201825 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 10, 2018, 11:16 PM CDT for 25 counties in Nebraska. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: May 10, 2018, 11:16 PM CDT (04:16 UTC)
Expired: May 11, 2018, 12:45 AM CDT
In force: 89 min
Issued by: the Storm Prediction Center

All 25 counties

Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Frontier County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Hayes County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Loup County, NE, Merrick County, NE, Nance County, NE, Perkins County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 89 km from the middle of the area, began a volume at 04:18 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.3 hours before the alert went out and 61 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: 1050 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1982 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 446 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.2

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
May 10, 7:06 PM CDT	Mesoscale Discussion	SPC	Dundy	114 min
May 10, 7:39 PM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Buffalo, Chase, Custer and 25 more	2 hr
May 10, 7:59 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Arthur, Blaine, Brown, Buffalo, Chase and 40 more	9 hr
May 11, 1:13 AM CDT	Mesoscale Discussion	SPC	Butler, Cass, Douglas, Gage, Jefferson, Johnson and 7 more	92 min
May 11, 1:50 AM CDT	Severe Thunderstorm Watch	SPC	Butler, Cass, Gage, Jefferson, Johnson, Lancaster and 6 more	3 hr
May 11, 4:24 AM CDT	Mesoscale Discussion	SPC	Adams, Butler, Cass, Clay, Colfax, Douglas and 22 more	66 min
May 11, 3:02 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Kimball, Scotts Bluff, Sioux	7 hr
May 11, 6:39 PM CDT	Mesoscale Discussion	SPC	Banner, Kimball, Scotts Bluff, Sioux	96 min

Nearby

Mesoscale Discussions in Nebraska, 2018 Every mesoscale discussion in 2018

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.