A supercell thunderstorm developed across the northern Black Hills and moved eastward across the Sturgis area, southern Meade County, northeastern Pennington County, Haakon County, and northeastern Jackson County. The storm produced baseball sized near Sturgis, then strong winds and hail larger than baseball sized developed as the storm moved across the plains. The storm hit Sturgis during the annual motorcycle rally and caused extensive damage to motorcycles, vehicles, and property. Minor injuries from the hail were also reported.

Hail in PENNINGTON, SOUTH DAKOTA
From 07-AUG-09 18:15:00 to 07-AUG-09 18:15:00 (MST-7)
Location: CREIGHTON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 07-AUG-09 18:15:00 to 07-AUG-09 18:15:00 (MST-7)
Location: CREIGHTON
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of wind and hail damaged an automobile and house.

Hail in HAAKON, SOUTH DAKOTA
From 07-AUG-09 18:35:00 to 07-AUG-09 18:35:00 (MST-7)
Location: PHILIP
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in HAAKON, SOUTH DAKOTA
From 07-AUG-09 18:35:00 to 07-AUG-09 18:35:00 (MST-7)
Location: PHILIP
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of wind and hail damaged a house, automobiles, and other property.

Hail in JACKSON, SOUTH DAKOTA
From 07-AUG-09 20:05:00 to 07-AUG-09 20:05:00 (MST-7)
Location: BELVIDERE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MEADE, SOUTH DAKOTA
From 07-AUG-09 16:45:00 to 07-AUG-09 16:45:00 (MST-7)
Location: STURGIS
Magnitude: 2.50 
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail damaged automobiles and property.

Hail in MEADE, SOUTH DAKOTA
From 07-AUG-09 17:08:00 to 07-AUG-09 17:15:00 (MST-7)
Location: HEREFORD
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 07-AUG-09 17:08:00 to 07-AUG-09 17:15:00 (MST-7)
Location: HEREFORD
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Employee

The combination of wind and hail damaged automobiles.

Hail in MEADE, SOUTH DAKOTA
From 07-AUG-09 17:25:00 to 07-AUG-09 17:40:00 (MST-7)
Location: HEREFORD
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 07-AUG-09 17:25:00 to 07-AUG-09 17:40:00 (MST-7)
Location: HEREFORD
Magnitude: 61.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The combination of strong wind and large hail damaged automobiles, buildings, and crops around Hereford.

Hail in HAAKON, SOUTH DAKOTA
From 07-AUG-09 19:35:00 to 07-AUG-09 19:35:00 (MST-7)
Location: MIDLAND
Magnitude: 3.00 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

Large hail damaged and broke windows of automobiles.

Hail in LAWRENCE, SOUTH DAKOTA
From 07-AUG-09 16:22:00 to 07-AUG-09 16:26:00 (MST-7)
Location: DEADWOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MEADE, SOUTH DAKOTA
From 07-AUG-09 16:41:00 to 07-AUG-09 16:45:00 (MST-7)
Location: STURGIS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Golfball sized hail caused significant damage to automobiles and motorcycles in Sturgis.

Hail in MEADE, SOUTH DAKOTA
From 07-AUG-09 16:46:00 to 07-AUG-09 16:46:00 (MST-7)
Location: STURGIS
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Baseball sized hail caused significant damage to automobiles, motorcycles, and property at a large bar and campground east of Sturgis.

Hail in LAWRENCE, SOUTH DAKOTA
From 07-AUG-09 16:25:00 to 07-AUG-09 16:25:00 (MST-7)
Location: DEADWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter