Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 1482

July 15, 20077 counties in Kansas; 30 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2007, 2:06 PM CDT for 7 counties in Kansas; 30 counties in Nebraska. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jul 15, 2007, 2:06 PM CDT (19:06 UTC)
Expired: Jul 15, 2007, 4:00 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center

All 37 counties

Cheyenne County, KS, Decatur County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 91 km from the middle of the area, began a volume at 19:05 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.

Severe Thunderstorm Watch 520Jul 15, 2:40 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.1 hours before the alert went out and 23 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: 937 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1946 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
Jul 14, 7:44 PM CDT	Mesoscale Discussion	SPC	Atchison, Jefferson, Leavenworth, Wyandotte	91 min
Jul 14, 8:01 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Clay, Comanche, Dickinson and 26 more	59 min
Jul 15, 2:37 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Arthur, Blaine, Boyd, Brown, Buffalo and 41 more	7 hr
Jul 15, 5:14 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Butler, Clay and 32 more	91 min
Jul 15, 6:27 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 19 more	4 hr

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.