Alert archive / Iowa / Mesoscale Discussions in 2026

Mesoscale Discussion 928

May 31, 202616 counties in Iowa; 16 counties in Nebraska; Union County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 31, 2026, 10:46 PM CDT for 16 counties in Iowa; 16 counties in Nebraska; Union County, South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: May 31, 2026, 10:46 PM CDT (03:46 UTC)
Expired: Jun 1, 2026, 12:45 AM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 257...259

All 33 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Lancaster County, NE, Otoe County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thurston County, NE, Washington County, NE, Union County, SD

The radar

The Omaha radar (KOAX), 53 km from the middle of the area, began a volume at 03:49 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 31, 9:15 PM CDT	Mesoscale Discussion	SPC	Plymouth, Sioux	2 hr
May 31, 9:30 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Audubon, Carroll, Cass, Crawford, Fremont and 9 more	7 hr
May 31, 9:38 PM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	4 hr
Jun 1, 2:18 AM CDT	Mesoscale Discussion	SPC	Adams, Montgomery, Ringgold, Taylor	87 min
May 31, 7:26 PM CDT	Mesoscale Discussion	SPC	Burt, Butler, Cass, Cedar, Colfax, Cuming and 10 more	2 hr
Jun 1, 12:51 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 4 more	2 hr
Jun 1, 1:52 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	7 hr
Jun 1, 4:37 PM CDT	Severe Thunderstorm Watch	SPC	Dundy, Hitchcock, Red Willow	7 hr
Jun 1, 4:38 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 4 more	67 min

Nearby

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