Alert archive / South Dakota / Mesoscale Discussions in 2025
Mesoscale Discussion 1306
The Storm Prediction Center issued this mesoscale discussion at Jun 15, 2025, 6:27 PM MDT for 19 counties in South Dakota; 5 counties in Wyoming. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Jun 15, 2025, 6:27 PM MDT (00:27 UTC)
- Expired
- Jun 15, 2025, 8:00 PM MDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 95%
All 24 counties
Bennett County, SD, Butte County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Ziebach County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Niobrara County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 57 km from the middle of the area, began a volume at 00:27 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
Rapid City, SD (KUNR), launched 00:00Z, 0.5 hours before the alert went out and 51 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
- 2203 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 2506 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- -56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -3.8
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 6:51 PM MDT | Severe Thunderstorm Watch | SPC | Bennett, Butte, Campbell, Corson, Custer, Dewey and 20 more | 8 hr |
| Jun 16, 12:40 AM MDT | Mesoscale Discussion | SPC | Campbell, Corson, Edmunds, McPherson, Perkins, Walworth | 2 hr |
| Jun 16, 12:49 PM MDT | Mesoscale Discussion | SPC | Aurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 8 more | 116 min |
| Jun 16, 3:46 PM MDT | Mesoscale Discussion | SPC | Clay, Union | 89 min |
| Jun 16, 4:52 PM MDT | Mesoscale Discussion | SPC | Butte, Custer, Lawrence | 113 min |
| Jun 16, 1:53 PM MDT | Mesoscale Discussion | SPC | Sheridan | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2025Mesoscale Discussions in Wyoming, 2025Every mesoscale discussion in 2025
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.