Alert archive / South Dakota / Mesoscale Discussions in 2005
Mesoscale Discussion 2075
The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2005, 3:31 PM CDT for Boyd County, Nebraska; 20 counties in South Dakota. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2005, 3:31 PM CDT (20:31 UTC)
- Expired
- Aug 25, 2005, 4:30 PM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 21 counties
Boyd County, NE, Aurora County, SD, Beadle County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Marshall County, SD, Miner County, SD, Sanborn County, SD, Spink County, SD
The radar
The Sioux Falls radar (KFSD), 139 km from the middle of the area, began a volume at 20:33 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.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 8.5 hours before the alert went out and 96 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.
- Mixed-layer CAPE
- 1435 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 511 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 25, 2:03 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cherry, Cheyenne, Deuel and 9 more | 87 min |
| Aug 25, 2:55 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 11 more | 7 hr |
| Aug 25, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | Boyd, Brown, Holt, Keya Paha, Knox, Rock | 7 hr |
| Aug 25, 1:20 PM CDT | Mesoscale Discussion | SPC | Brown, Marshall, Roberts | 115 min |
Nearby
Mesoscale Discussions in South Dakota, 2005Mesoscale Discussions in Nebraska, 2005Every 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.