A cluster of severe thunderstorms developed over far northeastern Wyoming and tracked eastward across the northern Black Hills and the west central South Dakota plains. These storms produced hail to the size of golf balls, wind gusts to 70 mph, and heavy rain.

Hail in LAWRENCE, SOUTH DAKOTA
From 03-AUG-10 10:25:00 to 03-AUG-10 10:29:00 (MST-7)
Location: SPEARFISH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAWRENCE, SOUTH DAKOTA
From 03-AUG-10 10:45:00 to 03-AUG-10 10:45:00 (MST-7)
Location: CHEYENNE CROSSING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail fell at Savoy in Spearfish Canyon.

Hail in LAWRENCE, SOUTH DAKOTA
From 03-AUG-10 11:00:00 to 03-AUG-10 11:00:00 (MST-7)
Location: LEAD
Magnitude: 1.75 
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Public

Golf ball sized hail damaged automobiles and buildings in Lead.

Hail in LAWRENCE, SOUTH DAKOTA
From 03-AUG-10 11:03:00 to 03-AUG-10 11:03:00 (MST-7)
Location: CENTRAL CITY
Magnitude: 1.75 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball sized hail damaged automobiles and buildings in Central City.

Hail in LAWRENCE, SOUTH DAKOTA
From 03-AUG-10 11:15:00 to 03-AUG-10 11:25:00 (MST-7)
Location: DEADWOOD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 03-AUG-10 11:55:00 to 03-AUG-10 11:55:00 (MST-7)
Location: VALE
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in LAWRENCE, SOUTH DAKOTA
From 03-AUG-10 11:20:00 to 03-AUG-10 11:25:00 (MST-7)
Location: DEADWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 03-AUG-10 11:43:00 to 03-AUG-10 11:43:00 (MST-7)
Location: STURGIS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts of 60 mph were reported at Bear Butte State Park.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 03-AUG-10 11:55:00 to 03-AUG-10 11:55:00 (MST-7)
Location: TILFORD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts to 60 mph were estimated at the Tilford Rest Area.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 03-AUG-10 12:25:00 to 03-AUG-10 12:25:00 (MST-7)
Location: BLACK HAWK
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 PENNINGTON, SOUTH DAKOTA
From 03-AUG-10 13:20:00 to 03-AUG-10 13:20:00 (MST-7)
Location: OWANKA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 03-AUG-10 13:20:00 to 03-AUG-10 13:20:00 (MST-7)
Location: OWANKA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated wind gusts of 70 mph were reported.

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 03-AUG-10 13:55:00 to 03-AUG-10 13:55:00 (MST-7)
Location: WALL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated at 70 mph.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 03-AUG-10 11:54:00 to 03-AUG-10 11:54:00 (MST-7)
Location: PIEDMONT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts estimated at 60 mph.