A long-lived complex of severe thunderstorms tracked from southeastern Montana across northwestern South Dakota. The strongest storms produced hail to six inches in diameter, wind gusts over 80 mph, and a tornado in southern Meade County. Significant structure, property, and crop damage was reported in Butte and Meade Counties. Livestock were killed by the large hail in the Nisland area, with one rancher losing 35 sheep. The storms continued into south central South Dakota, but no reports were received due to a widespread power outage.

Hail in LAWRENCE, SOUTH DAKOTA
From 19-JUN-15 19:25:00 to 19-JUN-15 19:45:00 (MST-7)
Location: ST ONGE
Magnitude: 4.50 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Baseball to softball sized hail caused property damage.

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 19-JUN-15 21:24:00 to 19-JUN-15 21:24:00 (MST-7)
Location: WALL
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Hail in PENNINGTON, SOUTH DAKOTA
From 19-JUN-15 21:32:00 to 19-JUN-15 21:32:00 (MST-7)
Location: WALL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:30:00 to 19-JUN-15 19:30:00 (MST-7)
Location: VALE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:41:00 to 19-JUN-15 19:41:00 (MST-7)
Location: BELLE FOURCHE
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado in MEADE, SOUTH DAKOTA
From 19-JUN-15 19:57:00 to 19-JUN-15 20:27:00 (MST-7)
Location: HEREFORD
Tornado F-scale: EF2
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in rural southern Meade County, damaging buildings and tossing equipment at two ranches.

Thunderstorm Wind in JACKSON, SOUTH DAKOTA
From 19-JUN-15 22:30:00 to 19-JUN-15 22:30:00 (MST-7)
Location: BELVIDERE
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Four semi tractor-trailers were blown over along Interstate 90 between mile markers 170 and 174. Four nearby grain bins and a pole barn were blown down; one flew across the Interstate. Several telephone poles were snapped. Time was estimated by the sheriff.

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 19-JUN-15 18:30:00 to 19-JUN-15 18:30:00 (MST-7)
Location: BELLE FOURCHE
Magnitude: 78.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hail in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:08:00 to 19-JUN-15 19:13:00 (MST-7)
Location: BELLE FOURCHE RESERVOIR
Magnitude: 1.75 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of hail and strong wind gust broke house windows.

Hail in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:20:00 to 19-JUN-15 19:20:00 (MST-7)
Location: NISLAND
Magnitude: 6.00 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:20:00 to 19-JUN-15 19:20:00 (MST-7)
Location: NISLAND
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of very large hail and strong wind gusts caused significant property damage.

Hail in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:30:00 to 19-JUN-15 19:30:00 (MST-7)
Location: NISLAND
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:30:00 to 19-JUN-15 19:30:00 (MST-7)
Location: NISLAND
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Several windows of a house were broken and roof damage occurred from wind-driven hail.

Hail in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:20:00 to 19-JUN-15 19:20:00 (MST-7)
Location: NEWELL
Magnitude: 4.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:20:00 to 19-JUN-15 19:20:00 (MST-7)
Location: NEWELL
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of softball sized hail and strong wind gust broke several windows and damaged the siding and roof of a house.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 19-JUN-15 20:10:00 to 19-JUN-15 20:10:00 (MST-7)
Location: HEREFORD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated at 60 mph.

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 19-JUN-15 19:20:00 to 19-JUN-15 19:20:00 (MST-7)
Location: NISLAND
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 19-JUN-15 20:11:00 to 19-JUN-15 20:11:00 (MST-7)
Location: HEREFORD
Magnitude: 103.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Rear flank downdraft wind gusts estimated over 100 mph blew down a half mile of a large electrical transmission line.

Hail in MEADE, SOUTH DAKOTA
From 19-JUN-15 20:10:00 to 19-JUN-15 20:10:00 (MST-7)
Location: HEREFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 19-JUN-15 21:10:00 to 19-JUN-15 21:10:00 (MST-7)
Location: SCENIC
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 19-JUN-15 20:45:00 to 19-JUN-15 20:45:00 (MST-7)
Location: WASTA
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways