Alert archive / South Dakota / Mesoscale Discussions in 2025

Mesoscale Discussion 1939

August 13, 202515 counties in South Dakota; Crook County, Weston County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2025, 2:11 PM MDT for 15 counties in South Dakota; Crook County, Weston County, Wyoming. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Aug 13, 2025, 2:11 PM MDT (20:11 UTC)
Expired
Aug 13, 2025, 3:45 PM MDT
In force
94 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
60%

Counties Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Todd County, SD, Crook County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 35 km from the middle of the area, began a volume at 20:14 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 text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 13, 2:48 PM MDTSevere Thunderstorm WatchSPCBennett, Bon Homme, Brule, Butte, Charles Mix, Custer and 17 more9 hr
Aug 13, 4:21 PM MDTMesoscale DiscussionSPCAurora, Bennett, Brule, Buffalo, Butte, Charles Mix and 15 more114 min
Aug 13, 5:51 PM MDTMesoscale DiscussionSPCBrown, Clark, Codington, Day, Deuel, Grant and 3 more114 min

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; radar from the NEXRAD Level II archive.