Alert archive / South Dakota / Mesoscale Discussions in 2026

Mesoscale Discussion 920

May 31, 20264 states

The Storm Prediction Center issued this mesoscale discussion at May 31, 2026, 3:20 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 31, 2026, 3:20 PM CDT (20:20 UTC)
Expired: May 31, 2026, 5:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

All 44 counties

Lyon County, IA, Plymouth County, IA, Sioux County, IA, Rock County, MN, Cedar County, NE, Dakota County, NE, Dixon County, NE, Knox County, NE, Pierce County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, McPherson County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Union County, SD, Walworth County, SD, Yankton County, SD

The radar

The Aberdeen radar (KABR), 135 km from the middle of the area, began a volume at 20:21 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 text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 7:01 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Chase, Cherry, Custer, Deuel and 15 more	89 min
May 30, 7:29 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Fillmore, Franklin, Hall and 6 more	2 hr
May 30, 8:48 PM CDT	Mesoscale Discussion	SPC	Box Butte, Dawes, Sheridan	87 min
May 30, 9:10 PM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Custer, Garfield, Holt and 9 more	95 min
May 30, 9:25 PM CDT	Mesoscale Discussion	SPC	Adams, Butler, Clay, Fillmore, Gage, Hall and 17 more	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2026 Mesoscale Discussions in Nebraska, 2026 Mesoscale Discussions in Iowa, 2026 Every mesoscale discussion in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.