Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 1931

August 10, 20117 counties in Kansas; 8 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2011, 3:53 AM CDT for 7 counties in Kansas; 8 counties in Nebraska. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Aug 10, 2011, 3:53 AM CDT (08:53 UTC)
Expired
Aug 10, 2011, 5:00 AM CDT
In force
67 min
Issued by
the Storm Prediction Center

Counties Cheyenne County, KS, Decatur County, KS, Gove County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Chase County, NE, Dundy County, NE, Frontier County, NE, Hayes County, NE, Hitchcock County, NE, Lincoln County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 100 km from the middle of the area, began a volume at 08:56 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, 8.9 hours before the alert went out and 123 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2011-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2011-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 340 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
114 J/kg
Mixed-layer CIN
-382 J/kg
Mixed-layer LCL
1109 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
340 m²/s²
0-3 km storm-relative helicity
524 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

IssuedProductOfficeCountiesLasted
Aug 9, 8:27 PM CDTMesoscale DiscussionSPCClark, Comanche, Kiowa, Meade, Seward2 hr
Aug 9, 9:26 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more64 min
Aug 9, 9:51 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Gove, Graham, Greeley, Logan and 7 more7 hr
Aug 9, 11:11 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chautauqua, Cowley, Edwards and 28 more94 min
Aug 10, 3:25 AM CDTMesoscale DiscussionSPCBarton, Butler, Cowley, Ellis, Ellsworth, Greenwood and 12 more65 min
Aug 10, 3:42 AM CDTSevere Thunderstorm WatchSPCBarton, Butler, Chase, Chautauqua, Cowley, Elk and 17 more3 hr
Aug 10, 6:54 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Graham, Logan, Norton and 5 more66 min
Aug 10, 4:42 PM CDTMesoscale DiscussionSPCArthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 12 more63 min
Aug 10, 5:03 PM CDTSevere Thunderstorm WatchSPCArthur, Banner, Box Butte, Chase, Cherry, Cheyenne and 18 more6 hr

Nearby

Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Kansas, 2011Every mesoscale discussion in 2011

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.