Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 2298

September 28, 200812 counties in Nebraska; Clay County, Union County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Sep 28, 2008, 9:22 PM CDT for 12 counties in Nebraska; Clay County, Union County, South Dakota. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Sep 28, 2008, 9:22 PM CDT (02:22 UTC)
Expired: Sep 28, 2008, 10:15 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Antelope County, NE, Boone County, NE, Cedar County, NE, Cuming County, NE, Dixon County, NE, Greeley County, NE, Madison County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Wayne County, NE, Clay County, SD, Union County, SD

The radar

The Omaha radar (KOAX), 134 km from the middle of the area, began a volume at 02:24 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

Omaha, NE (KOAX), launched 00:00Z, 2.4 hours before the alert went out and 133 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: 1309 J/kg
Mixed-layer CIN: -243 J/kg
Mixed-layer LCL: 1543 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 360 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.

Issued	Product	Office	Counties	Lasted
Sep 28, 7:04 PM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Boyd, Cedar, Garfield, Greeley and 14 more	116 min
Sep 29, 12:39 AM CDT	Mesoscale Discussion	SPC	Gage, Johnson, Nemaha, Otoe, Pawnee, Richardson	96 min

Nearby

Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in South Dakota, 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.