Alert archive / South Dakota / Mesoscale Discussions in 2015
Mesoscale Discussion 1561
The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2015, 1:57 AM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2015, 1:57 AM CDT (06:57 UTC)
- Expired
- Jul 28, 2015, 4:00 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 63 counties
Lyon County, IA, Sioux County, IA, Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Norman County, MN, Otter Tail County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Rock County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, LaMoure County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brown County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Marshall County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Yankton County, SD
The radar
The Aberdeen radar (KABR), 91 km from the middle of the area, began a volume at 06:59 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
Aberdeen, SD (KABR), launched 00:00Z, 7.0 hours before the alert went out and 90 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
- 2357 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1333 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 3:37 AM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, O'Brien, Osceola, Plymouth, Sioux | 2 hr |
| Jul 28, 3:40 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 25 more | 2 hr |
| Jul 28, 5:46 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Clarke, Davis and 28 more | 6 hr |
| Jul 27, 7:31 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bowman, Burke, Burleigh, Divide and 17 more | 7 hr |
| Jul 27, 9:19 PM CDT | Mesoscale Discussion | SPC | Adams, Billings, Bowman, Divide, Dunn, Golden Valley and 12 more | 116 min |
| Jul 27, 9:41 PM CDT | Mesoscale Discussion | SPC | Dickey, LaMoure, McIntosh, Ransom, Sargent | 3 hr |
| Jul 27, 10:49 PM CDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Bottineau, Cavalier, Dickey, Eddy and 17 more | 5 hr |
Nearby
Mesoscale Discussions in South Dakota, 2015Mesoscale Discussions in Minnesota, 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.