Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 864

May 23, 20075 counties in Kansas; 12 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 23, 2007, 2:27 AM CDT for 5 counties in Kansas; 12 counties in Nebraska. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: May 23, 2007, 2:27 AM CDT (07:27 UTC)
Expired: May 23, 2007, 4:00 AM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Cloud County, KS, Ellsworth County, KS, Lincoln County, KS, Ottawa County, KS, Republic County, KS, Butler County, NE, Colfax County, NE, Dodge County, NE, Fillmore County, NE, Jefferson County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 71 km from the middle of the area, began a volume at 07:29 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 7.5 hours before the alert went out and 269 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1480 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -77 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
May 22, 9:41 PM CDT	Mesoscale Discussion	SPC	Ellis, Finney, Jewell, Ness, Osborne, Pawnee and 6 more	94 min
May 22, 10:49 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Cloud, Ellis, Ellsworth, Jewell, Lincoln and 12 more	5 hr
May 23, 12:22 PM CDT	Mesoscale Discussion	SPC	Barber, Clay, Cloud, Comanche, Dickinson, Ellsworth and 13 more	83 min
May 23, 1:27 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Barton, Brown, Clay, Comanche, Dickinson and 24 more	7 hr
May 23, 2:20 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Ford, Grant, Gray, Greeley and 12 more	55 min
May 23, 3:11 PM CDT	Mesoscale Discussion	SPC	Barber, Brown, Dickinson, Ellsworth, Geary, Harvey and 12 more	94 min
May 23, 3:31 PM CDT	Tornado Watch PDS	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 19 more	7 hr
May 23, 4:33 PM CDT	Mesoscale Discussion	SPC	Hamilton, Kearny, Morton, Stanton	2 hr
May 23, 5:19 PM CDT	Mesoscale Discussion	SPC	Atchison, Barton, Brown, Clay, Cloud, Dickinson and 28 more	86 min
May 23, 6:06 PM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Edwards, Finney, Ford, Grant and 12 more	84 min
May 22, 7:50 PM CDT	Mesoscale Discussion	SPC	Antelope, Boyd, Cedar, Garfield, Holt, Knox and 2 more	85 min

Nearby

Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in Kansas, 2007 Every mesoscale discussion in 2007

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.