Alert archive / South Dakota / Mesoscale Discussions in 2026

Mesoscale Discussion 754

May 17, 20264 counties in Iowa; Nobles County, Pipestone County, Rock County, Minnesota; 10 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 17, 2026, 3:31 PM CDT for 4 counties in Iowa; Nobles County, Pipestone County, Rock County, Minnesota; 10 counties in South Dakota. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: May 17, 2026, 3:31 PM CDT (20:31 UTC)
Expired: May 17, 2026, 5:00 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 213

Counties Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Nobles County, MN, Pipestone County, MN, Rock County, MN, Bon Homme County, SD, Clay County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 40 km from the middle of the area, began a volume at 20:36 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 17, 1:11 PM CDT	Mesoscale Discussion	SPC	Cherokee, Harrison, Ida, Lyon, Monona, O'Brien and 4 more	2 hr
May 17, 1:42 PM CDT	Tornado Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more	8 hr
May 17, 3:16 PM CDT	Tornado Watch	SPC	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	8 hr
May 17, 5:45 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cerro Gordo, Clay, Emmet, Floyd, Franklin and 10 more	60 min
May 17, 6:12 PM CDT	Tornado Watch	SPC	Bremer, Butler, Cerro Gordo, Chickasaw, Emmet, Fayette and 13 more	6 hr
May 17, 6:53 PM CDT	Mesoscale Discussion	SPC	Cherokee, Crawford, Fremont, Harrison, Ida, Mills and 6 more	67 min
May 17, 11:58 AM CDT	Mesoscale Discussion	SPC	Charles Mix, Gregory, Tripp	92 min

Nearby

Mesoscale Discussions in South Dakota, 2026 Mesoscale Discussions in Iowa, 2026 Mesoscale Discussions in Minnesota, 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.