A line of severe thunderstorms moved from northeastern Wyoming across the northern Black Hills and west central South Dakota plains. Hail larger than the size of baseballs and wind gusts to 70 mph caused significant damage to buildings and automobiles and power outages across much of Rapid City.

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:10:00 to 24-JUN-11 18:25:00 (MST-7)
Location: RAPID CITY
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

One to three inch diameter hail fell over the south side of Rapid City.

Lightning in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:12:00 to 24-JUN-11 18:12:00 (MST-7)
Location: RAPID CITY
Property damage: 6.00K
Crop damage: 0.00K
Reported by: NWS Employee

Lightning struck the National Weather Service office, damaging computers and equipment.

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:11:00 to 24-JUN-11 18:15:00 (MST-7)
Location: RAPID CITY
Magnitude: 1.50 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hail in MEADE, SOUTH DAKOTA
From 24-JUN-11 17:46:00 to 24-JUN-11 17:46:00 (MST-7)
Location: PIEDMONT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAWRENCE, SOUTH DAKOTA
From 24-JUN-11 16:51:00 to 24-JUN-11 17:00:00 (MST-7)
Location: SPEARFISH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in LAWRENCE, SOUTH DAKOTA
From 24-JUN-11 16:55:00 to 24-JUN-11 16:55:00 (MST-7)
Location: CHEYENNE CROSSING
Magnitude: 3.00 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAWRENCE, SOUTH DAKOTA
From 24-JUN-11 17:20:00 to 24-JUN-11 17:20:00 (MST-7)
Location: DEADWOOD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAWRENCE, SOUTH DAKOTA
From 24-JUN-11 17:20:00 to 24-JUN-11 17:20:00 (MST-7)
Location: DEADWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 17:41:00 to 24-JUN-11 17:41:00 (MST-7)
Location: JOHNSON SIDING
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 17:44:00 to 24-JUN-11 17:44:00 (MST-7)
Location: JOHNSON SIDING
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAWRENCE, SOUTH DAKOTA
From 24-JUN-11 17:35:00 to 24-JUN-11 17:35:00 (MST-7)
Location: NEMO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:10:00 to 24-JUN-11 18:10:00 (MST-7)
Location: RAPID CITY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:15:00 to 24-JUN-11 18:15:00 (MST-7)
Location: CAPUTA
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:15:00 to 24-JUN-11 18:15:00 (MST-7)
Location: CAPUTA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated near 80 mph.

Hail in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:00:00 to 24-JUN-11 18:15:00 (MST-7)
Location: RAPID CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in CUSTER, SOUTH DAKOTA
From 24-JUN-11 19:05:00 to 24-JUN-11 19:05:00 (MST-7)
Location: FOLSOM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAWRENCE, SOUTH DAKOTA
From 24-JUN-11 17:15:00 to 24-JUN-11 17:15:00 (MST-7)
Location: LEAD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:09:00 to 24-JUN-11 18:09:00 (MST-7)
Location: RAPID CITY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A tree 18 inches in diameter was uprooted and many large tree branches were broken by the wind.

Thunderstorm Wind in PENNINGTON, SOUTH DAKOTA
From 24-JUN-11 18:09:00 to 24-JUN-11 18:09:00 (MST-7)
Location: RAPID CITY
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations