Alert archive / South Dakota / Mesoscale Discussions in 2025
Mesoscale Discussion 2002
The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2025, 12:05 AM CDT for 31 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2025, 12:05 AM CDT (05:05 UTC)
- Expired
- Aug 22, 2025, 2:30 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 31 counties
Beadle County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Butte County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lyman County, SD, Meade County, SD, Miner County, SD, Pennington County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Aberdeen radar (KABR), 150 km from the middle of the area, began a volume at 05:04 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, 5.1 hours before the alert went out and 125 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
- 2017 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1254 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- -0.3
- Supercell composite
- -6.1
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 |
|---|---|---|---|---|
| Aug 21, 8:24 PM CDT | Mesoscale Discussion | SPC | Brookings, Codington, Deuel, Grant, Hamlin, Moody | 96 min |
| Aug 21, 11:57 PM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Brule, Buffalo, Butte, Clark and 25 more | 3 hr |
| Aug 22, 2:31 PM CDT | Mesoscale Discussion | SPC | Union | 119 min |
Nearby
Mesoscale Discussions in South Dakota, 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.