Alert archive / Nebraska / Mesoscale Discussions in 2017

Mesoscale Discussion 1055

June 16, 20174 counties in Kansas; 60 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2017, 1:41 PM CDT for 4 counties in Kansas; 60 counties in Nebraska. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2017, 1:41 PM CDT (18:41 UTC)
Expired: Jun 16, 2017, 3:15 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 64 counties

Jewell County, KS, Marshall County, KS, Republic County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dawson County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Holt County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 107 km from the middle of the area, began a volume at 18:42 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, 6.7 hours before the alert went out and 179 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: 139 J/kg
Mixed-layer CIN: -389 J/kg
Mixed-layer LCL: 1600 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 277 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 15, 7:07 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Barber, Bourbon, Brown, Butler and 45 more	6 hr
Jun 16, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Jewell, Marshall, Nemaha, Norton, Phillips and 3 more	8 hr
Jun 16, 6:16 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Jackson, Marshall, Nemaha and 1 more	119 min
Jun 16, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	Dakota, Dixon	7 hr

Nearby

Mesoscale Discussions in Nebraska, 2017 Mesoscale Discussions in Kansas, 2017 Every mesoscale discussion in 2017

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.