A long-lived supercell thunderstorm tracked along the eastern slopes of the Black Hills from the Piedmont area to Hermosa. The storm produced very large hail to around baseball size at times.

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:10:00 to 08-JUN-18 14:10:00 (MST-7)
Location: RAPID CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:10:00 to 08-JUN-18 14:10:00 (MST-7)
Location: HISEGA
Magnitude: 2.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MEADE, SOUTH DAKOTA
From 08-JUN-18 13:18:00 to 08-JUN-18 13:18:00 (MST-7)
Location: PIEDMONT
Magnitude: 1.50 
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MEADE, SOUTH DAKOTA
From 08-JUN-18 13:20:00 to 08-JUN-18 13:20:00 (MST-7)
Location: PIEDMONT
Magnitude: 2.50 
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in LAWRENCE, SOUTH DAKOTA
From 08-JUN-18 13:15:00 to 08-JUN-18 13:15:00 (MST-7)
Location: NEMO
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MEADE, SOUTH DAKOTA
From 08-JUN-18 13:25:00 to 08-JUN-18 13:25:00 (MST-7)
Location: BLACK HAWK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in LAWRENCE, SOUTH DAKOTA
From 08-JUN-18 13:33:00 to 08-JUN-18 13:33:00 (MST-7)
Location: NEMO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 13:35:00 to 08-JUN-18 13:50:00 (MST-7)
Location: JOHNSON SIDING
Magnitude: 2.75 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail to baseball size covered the ground.

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:01:00 to 08-JUN-18 14:01:00 (MST-7)
Location: HISEGA
Magnitude: 2.00 
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:07:00 to 08-JUN-18 14:07:00 (MST-7)
Location: HISEGA
Magnitude: 2.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:15:00 to 08-JUN-18 14:15:00 (MST-7)
Location: RAPID CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:27:00 to 08-JUN-18 14:30:00 (MST-7)
Location: ROCKERVILLE
Magnitude: 1.50 
Crop damage: 0.00K
Reported by: NWS Employee

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:32:00 to 08-JUN-18 14:32:00 (MST-7)
Location: ROCKERVILLE
Magnitude: 2.00 
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:45:00 to 08-JUN-18 14:45:00 (MST-7)
Location: ROCKERVILLE
Magnitude: 1.25 
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:45:00 to 08-JUN-18 14:45:00 (MST-7)
Location: ROCKERVILLE
Magnitude: 2.00 
Crop damage: 0.00K
Reported by: Public

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 14:55:00 to 08-JUN-18 14:55:00 (MST-7)
Location: HAYWARD
Magnitude: 1.50 
Crop damage: 0.00K
Reported by: NWS Employee

Hail in PENNINGTON, SOUTH DAKOTA
From 08-JUN-18 15:11:00 to 08-JUN-18 15:11:00 (MST-7)
Location: HAYWARD
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CUSTER, SOUTH DAKOTA
From 08-JUN-18 15:15:00 to 08-JUN-18 15:15:00 (MST-7)
Location: HERMOSA
Magnitude: 1.25 
Crop damage: 0.00K
Reported by: Storm Chaser