Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 718

April 24, 200812 counties in Kansas; 17 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2008, 8:55 PM CDT for 12 counties in Kansas; 17 counties in Nebraska. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Apr 24, 2008, 8:55 PM CDT (01:55 UTC)
Expired: Apr 24, 2008, 10:30 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 29 counties

Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Logan County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 154 km from the middle of the area, began a volume at 01:57 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 227Apr 24, 10:20 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.9 hours before the alert went out and 102 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: 179 J/kg
Mixed-layer CIN: -243 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 277 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
Apr 24, 10:20 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Clay, Cloud, Dickinson, Geary, Jackson and 14 more	7 hr
Apr 24, 11:55 PM CDT	Mesoscale Discussion	SPC	Brown, Clay, Cloud, Dickinson, Geary, Jackson and 14 more	65 min
Apr 25, 12:07 AM CDT	Severe Thunderstorm Watch	SPC	Doniphan	7 hr
Apr 25, 12:55 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 8 more	35 min
Apr 25, 1:13 AM CDT	Tornado Watch	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 6 more	5 hr
Apr 25, 3:18 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 6 more	57 min
Apr 25, 5:39 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Jackson	36 min
Apr 25, 6:38 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 17 more	67 min
Apr 25, 6:06 AM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boyd, Brown, Garfield, Holt and 5 more	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in Kansas, 2008 Every mesoscale discussion in 2008

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.