A long duration derecho tracked northeastward from Wyoming to the Black Hills area and across northwestern South Dakota. Wind gusts as high as 90 mph were reported across the area. Some trees and power poles were downed, along with mostly minor property damage.

Thunderstorm Wind in LAWRENCE, SOUTH DAKOTA
From 06-JUN-20 17:35:00 to 06-JUN-20 17:55:00 (MST-7)
Location: SPEARFISH
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in LAWRENCE, SOUTH DAKOTA
From 06-JUN-20 17:25:00 to 06-JUN-20 17:25:00 (MST-7)
Location: SPEARFISH
Magnitude: 61.00 MG
Crop damage: 0.00K
Reported by: RAWS

Time estimated from radar.

Thunderstorm Wind in CUSTER, SOUTH DAKOTA
From 06-JUN-20 16:44:00 to 06-JUN-20 16:44:00 (MST-7)
Location: JEWEL CAVE NATL MON
Magnitude: 65.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CUSTER, SOUTH DAKOTA
From 06-JUN-20 16:49:00 to 06-JUN-20 16:49:00 (MST-7)
Location: JEWEL CAVE NATL MON
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Four inch diameter tree branches were broken off trees.

Thunderstorm Wind in FALL RIVER, SOUTH DAKOTA
From 06-JUN-20 16:34:00 to 06-JUN-20 16:34:00 (MST-7)
Location: EDGEMONT
Magnitude: 67.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CUSTER, SOUTH DAKOTA
From 06-JUN-20 17:02:00 to 06-JUN-20 17:02:00 (MST-7)
Location: (CUT)CUSTER CO ARPT
Magnitude: 55.00 MG
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in CUSTER, SOUTH DAKOTA
From 06-JUN-20 17:24:00 to 06-JUN-20 17:36:00 (MST-7)
Location: FAIRBURN
Magnitude: 62.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in LAWRENCE, SOUTH DAKOTA
From 06-JUN-20 17:10:00 to 06-JUN-20 17:10:00 (MST-7)
Location: CHEYENNE CROSSING
Magnitude: 51.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in FALL RIVER, SOUTH DAKOTA
From 06-JUN-20 17:15:00 to 06-JUN-20 17:15:00 (MST-7)
Location: HOT SPRINGS MUNICIPAL AIRPORT
Magnitude: 50.00 MG
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in FALL RIVER, SOUTH DAKOTA
From 06-JUN-20 17:39:00 to 06-JUN-20 17:39:00 (MST-7)
Location: OELRICHS
Magnitude: 50.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 17:08:00 to 06-JUN-20 17:08:00 (MST-7)
Location: ROCHFORD
Magnitude: 50.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 17:24:00 to 06-JUN-20 17:24:00 (MST-7)
Location: HILL CITY
Magnitude: 55.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 17:30:00 to 06-JUN-20 17:30:00 (MST-7)
Location: RAPID CITY
Magnitude: 58.00 MG
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 17:19:00 to 06-JUN-20 17:22:00 (MST-7)
Location: SILVER CITY
Magnitude: 57.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 17:36:00 to 06-JUN-20 17:36:00 (MST-7)
Location: RAPID CITY
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts were estimated at 70 mph.

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 06-JUN-20 17:34:00 to 06-JUN-20 17:34:00 (MST-7)
Location: BELLE FOURCHE AIRPORT
Magnitude: 82.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 06-JUN-20 17:39:00 to 06-JUN-20 17:39:00 (MST-7)
Location: (RCA)ELLSWORTH AFB
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in LAWRENCE, SOUTH DAKOTA
From 06-JUN-20 17:15:00 to 06-JUN-20 17:15:00 (MST-7)
Location: LEAD
Magnitude: 58.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in LAWRENCE, SOUTH DAKOTA
From 06-JUN-20 17:15:00 to 06-JUN-20 17:15:00 (MST-7)
Location: SPEARFISH
Magnitude: 64.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 06-JUN-20 18:19:00 to 06-JUN-20 18:28:00 (MST-7)
Location: REDIG
Magnitude: 67.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 06-JUN-20 17:40:00 to 06-JUN-20 17:40:00 (MST-7)
Location: NISLAND
Magnitude: 55.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 06-JUN-20 17:44:00 to 06-JUN-20 17:44:00 (MST-7)
Location: CASTLE ROCK
Magnitude: 62.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 06-JUN-20 17:55:00 to 06-JUN-20 17:55:00 (MST-7)
Location: NEWELL
Magnitude: 71.00 MG
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 06-JUN-20 17:56:00 to 06-JUN-20 17:56:00 (MST-7)
Location: CASTLE ROCK
Magnitude: 57.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in LAWRENCE, SOUTH DAKOTA
From 06-JUN-20 17:00:00 to 06-JUN-20 17:00:00 (MST-7)
Location: CHEYENNE CROSSING
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Public

A woman was seriously injured from a tree falling on a camper at the Timon Campground.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 06-JUN-20 18:19:00 to 06-JUN-20 18:19:00 (MST-7)
Location: UNION CENTER
Magnitude: 50.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 17:43:00 to 06-JUN-20 17:43:00 (MST-7)
Location: RAPID CITY
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated at 60 mph.

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 06-JUN-20 18:00:00 to 06-JUN-20 18:00:00 (MST-7)
Location: NEW UNDERWOOD
Magnitude: 55.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 06-JUN-20 18:33:00 to 06-JUN-20 18:33:00 (MST-7)
Location: (2WX)BUFFALO
Magnitude: 68.00 MG
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 06-JUN-20 18:35:00 to 06-JUN-20 18:35:00 (MST-7)
Location: CAMP CROOK
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated at 60 mph.

Thunderstorm Wind in ZIEBACH, SOUTH DAKOTA
From 06-JUN-20 19:20:00 to 06-JUN-20 19:20:00 (MST-7)
Location: BRIDGER
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter estimated wind gusts at 60 mph.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 06-JUN-20 18:56:00 to 06-JUN-20 18:56:00 (MST-7)
Location: WHITE OWL
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 60 mph.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 06-JUN-20 19:15:00 to 06-JUN-20 19:15:00 (MST-7)
Location: FAITH
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 06-JUN-20 19:25:00 to 06-JUN-20 19:25:00 (MST-7)
Location: (D07)FAITH ARPT
Magnitude: 65.00 MG
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 06-JUN-20 19:08:00 to 06-JUN-20 19:08:00 (MST-7)
Location: ZEONA
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 60 mph.

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 06-JUN-20 19:34:00 to 06-JUN-20 19:34:00 (MST-7)
Location: LEMMON
Magnitude: 53.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ZIEBACH, SOUTH DAKOTA
From 06-JUN-20 19:30:00 to 06-JUN-20 19:30:00 (MST-7)
Location: BRIDGER
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ZIEBACH, SOUTH DAKOTA
From 06-JUN-20 19:50:00 to 06-JUN-20 19:50:00 (MST-7)
Location: DUPREE
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: COOP Observer

The observer estimated wind gusts at 70 mph.

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 06-JUN-20 19:45:00 to 06-JUN-20 19:45:00 (MST-7)
Location: SHADEHILL
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 60 mph.