Alert archive / South Dakota / Mesoscale Discussions in 2015
Mesoscale Discussion 1453
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2015, 5:02 PM MDT for 6 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2015, 5:02 PM MDT (23:02 UTC)
- Expired
- Jul 17, 2015, 7:00 PM MDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 109 counties
Logan County, CO, Phillips County, CO, Sedgwick County, CO, Becker County, MN, Big Stone County, MN, Clay County, MN, Grant County, MN, Norman County, MN, Otter Tail County, MN, Stevens County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Foster County, ND, Griggs County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawes County, NE, Dawson County, NE, Deuel County, NE, Frontier County, NE, Garden County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Aurora County, SD, Beadle County, SD, Bennett County, SD, Brookings County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Custer County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Fall River County, SD, Faulk County, SD, Grant County, SD, Gregory County, SD, Haakon County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Mellette County, SD, Miner County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY
The radar
The North Platte radar (KLNX), 214 km from the middle of the area, began a volume at 23:05 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, 11.0 hours before the alert went out and 178 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
- 490 J/kg
- Mixed-layer CIN
- -181 J/kg
- Mixed-layer LCL
- 1592 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Jul 17, 12:10 PM MDT | Mesoscale Discussion | SPC | Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 21 more | 2 hr |
| Jul 17, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | Becker, Big Stone, Clay, Grant, Mahnomen, Norman and 3 more | 7 hr |
| Jul 17, 2:36 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Blaine, Box Butte, Brown, Cherry and 15 more | 54 min |
| Jul 17, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | Arthur, Banner, Blaine, Box Butte, Brown, Buffalo and 34 more | 8 hr |
| Jul 17, 4:43 PM MDT | Mesoscale Discussion | SPC | Antelope, Boone, Cedar, Colfax, Cuming, Dixon and 12 more | 92 min |
| Jul 16, 7:09 PM MDT | Mesoscale Discussion | SPC | Sheridan | 96 min |
| Jul 17, 3:45 PM MDT | Mesoscale Discussion | SPC | Albany, Carbon, Converse, Laramie, Natrona, Platte and 1 more | 60 min |
Nearby
Mesoscale Discussions in South Dakota, 2015Mesoscale Discussions in Nebraska, 2015Mesoscale Discussions in North Dakota, 2015Every mesoscale discussion in 2015
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.