Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 2101

August 28, 200511 counties in Iowa; 5 counties in Missouri; 35 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 28, 2005, 3:21 PM CDT for 11 counties in Iowa; 5 counties in Missouri; 35 counties in Nebraska. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Aug 28, 2005, 3:21 PM CDT (20:21 UTC)
Expired: Aug 28, 2005, 4:45 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 51 counties

Adair County, IA, Adams County, IA, Cass County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Atchison County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Adams County, NE, Boone County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Valley County, NE, Washington County, NE, York County, NE

The radar

The Omaha radar (KOAX), 56 km from the middle of the area, began a volume at 20:23 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 753Aug 28, 5:25 PM CDT

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.4 hours before the alert went out and 56 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: 443 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1515 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 60 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
Aug 28, 5:09 PM CDT	Mesoscale Discussion	SPC	Adams, Cass, Fremont, Mills, Montgomery, Page and 4 more	96 min
Aug 28, 2:42 PM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 14 more	2 hr
Aug 28, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	Andrew, Buchanan, Caldwell, Clinton, Daviess, DeKalb and 5 more	3 hr
Aug 27, 10:04 PM CDT	Mesoscale Discussion	SPC	Adams, Clay, Fillmore, Franklin, Furnas, Hall and 8 more	56 min
Aug 28, 11:49 AM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 46 more	116 min
Aug 28, 12:20 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Butler, Clay, Colfax, Fillmore, Gage and 23 more	7 hr

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in Iowa, 2005 Mesoscale Discussions in Missouri, 2005 Every mesoscale discussion in 2005

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.