A long-lived supercell thunderstorm tracked southeast from North Dakota across far northwestern South Dakota during the evening. The storm produced large hail, wind gusts to 80 mph, and a tornado in far northern Harding County near the North Dakota border.

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 30-JUN-15 18:30:00 to 30-JUN-15 18:30:00 (MST-7)
Location: LUDLOW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated at 60 mph.

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 30-JUN-15 18:30:00 to 30-JUN-15 18:40:00 (MST-7)
Location: LUDLOW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter estimated wind gusts at 60 mph.

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 30-JUN-15 18:50:00 to 30-JUN-15 18:50:00 (MST-7)
Location: RALPH
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 70 mph.

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 30-JUN-15 19:19:00 to 30-JUN-15 19:19:00 (MST-7)
Location: PRAIRIE CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 60 mph.

Hail in HARDING, SOUTH DAKOTA
From 30-JUN-15 19:15:00 to 30-JUN-15 19:15:00 (MST-7)
Location: RALPH
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HARDING, SOUTH DAKOTA
From 30-JUN-15 19:20:00 to 30-JUN-15 19:20:00 (MST-7)
Location: REVA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 30-JUN-15 19:20:00 to 30-JUN-15 19:20:00 (MST-7)
Location: REVA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Sixty mph wind gusts were noted.

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

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

Wind gusts to 70 mph accompanied tennis ball sized hail.

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 30-JUN-15 19:58:00 to 30-JUN-15 19:58:00 (MST-7)
Location: ZEONA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts to 80 mph uprooted several six to eight inch diameter trees.

Hail in PERKINS, SOUTH DAKOTA
From 30-JUN-15 20:22:00 to 30-JUN-15 20:22:00 (MST-7)
Location: USTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 30-JUN-15 20:22:00 to 30-JUN-15 20:22:00 (MST-7)
Location: USTA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 60 mph.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 30-JUN-15 20:55:00 to 30-JUN-15 20:55:00 (MST-7)
Location: FAITH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter estimated wind gusts at 60 mph.

Hail in MEADE, SOUTH DAKOTA
From 30-JUN-15 20:54:00 to 30-JUN-15 20:54:00 (MST-7)
Location: MARCUS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in HARDING, SOUTH DAKOTA
From 30-JUN-15 18:30:00 to 30-JUN-15 18:34:00 (MST-7)
Location: LUDLOW
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A tornado touched down in southern Bowman County, North Dakota and moved south into South Dakota west of US Highway 85. The total path length was almost four miles, and was on the ground over a mile in South Dakota. It caused no damage in Harding County, but did damage buildings on a farm about a mile north of the state line estimated around 100 mph and corresponding to EF1. Additional information on the first portion of this tornado is in the North Dakota, Central and West section of this Storm Data report.

Hail in HARDING, SOUTH DAKOTA
From 30-JUN-15 19:30:00 to 30-JUN-15 19:30:00 (MST-7)
Location: REVA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in HARDING, SOUTH DAKOTA
From 30-JUN-15 19:30:00 to 30-JUN-15 19:30:00 (MST-7)
Location: REVA
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind-driven hail broke windows.