Severe thunderstorms developed across parts of central and north central South Dakota bringing large hail up to the size of golf balls and damaging winds to near 70 mph. Some tree, vehicle, and building damage occurred with some of the storms.

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 18-JUL-08 22:28:00 to 18-JUL-08 22:28:00 (MST-7)
Location: FT PIERRE
Magnitude: 70.00 EG
Reported by: Newspaper

Eighty mph winds or higher brought down many branches along with some  trees in Fort Pierre. Power was cut off for parts of Fort Pierre when branches fell on power lines. Several truck trailers and feed silos were tipped onto their sides by the high winds. There was also some buildings damaged. A loaded train was pushed down the tracks almost a quarter of a mile by the high winds.

Thunderstorm Wind in HUGHES, SOUTH DAKOTA
From 18-JUL-08 23:29:00 to 18-JUL-08 23:29:00 (CST-6)
Location: PIERRE
Magnitude: 61.00 EG
Reported by: Newspaper

Seventy mph winds or higher brought down many tree branches along with some trees in Pierre. There was also some power outages in Pierre along with some buildings receiving damage.

Hail in CORSON, SOUTH DAKOTA
From 18-JUL-08 17:45:00 to 18-JUL-08 17:45:00 (MST-7)
Location: ATHBOY
Magnitude: 1.00 
Reported by: Public

Hail in CORSON, SOUTH DAKOTA
From 18-JUL-08 17:50:00 to 18-JUL-08 17:50:00 (MST-7)
Location: ATHBOY
Magnitude: 0.88 
Reported by: Public

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 18-JUL-08 21:25:00 to 18-JUL-08 21:25:00 (MST-7)
Location: MISSION RIDGE
Magnitude: 52.00 EG
Reported by: Public

Sixty mph winds downed several large tree branches.

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 18-JUL-08 23:30:00 to 18-JUL-08 23:30:00 (CST-6)
Location: MURDO
Magnitude: 61.00 EG
Reported by: Emergency Manager

Seventy mph winds flattened a two stall garage, bent a flag pole over, and downed many large tree limbs.

Thunderstorm Wind in HAND, SOUTH DAKOTA
From 19-JUL-08 00:20:00 to 19-JUL-08 00:20:00 (CST-6)
Location: DANFORTH
Magnitude: 61.00 EG
Reported by: Public

Seventy mph winds laid much of the crops over, brought down some branches, and damaged a fence and a swing set.

Thunderstorm Wind in HUGHES, SOUTH DAKOTA
From 18-JUL-08 23:29:00 to 18-JUL-08 23:29:00 (CST-6)
Location: PIERRE
Magnitude: 56.00 MG
Reported by: ASOS

Thunderstorm Wind in HUGHES, SOUTH DAKOTA
From 18-JUL-08 23:29:00 to 18-JUL-08 23:29:00 (CST-6)
Location: (PIR)PIERRE ARPT
Magnitude: 58.00 MG
Reported by: Trained Spotter

Thunderstorm Wind in HUGHES, SOUTH DAKOTA
From 18-JUL-08 23:38:00 to 18-JUL-08 23:38:00 (CST-6)
Location: BLUNT
Magnitude: 56.00 MG
Reported by: Public

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 18-JUL-08 17:45:00 to 18-JUL-08 17:45:00 (MST-7)
Location: ATHBOY
Magnitude: 52.00 EG
Reported by: Public

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 18-JUL-08 22:18:00 to 18-JUL-08 22:18:00 (MST-7)
Location: FT PIERRE
Magnitude: 52.00 EG
Reported by: Trained Spotter

Hail in CORSON, SOUTH DAKOTA
From 18-JUL-08 18:05:00 to 18-JUL-08 18:05:00 (MST-7)
Location: ATHBOY
Magnitude: 0.88 
Reported by: Public

Hail in DEWEY, SOUTH DAKOTA
From 18-JUL-08 19:25:00 to 18-JUL-08 19:25:00 (MST-7)
Location: ISABEL
Magnitude: 0.75 
Reported by: Public

Hail in DEWEY, SOUTH DAKOTA
From 18-JUL-08 19:40:00 to 18-JUL-08 19:40:00 (MST-7)
Location: RIDGEVIEW
Magnitude: 1.75 
Reported by: Public

Golf ball sized hail broke the windshield on a truck.

Hail in DEWEY, SOUTH DAKOTA
From 18-JUL-08 20:00:00 to 18-JUL-08 20:00:00 (MST-7)
Location: WHITEHORSE
Magnitude: 1.75 
Reported by: Public

Hail in DEWEY, SOUTH DAKOTA
From 18-JUL-08 21:15:00 to 18-JUL-08 21:15:00 (MST-7)
Location: THATCHER
Magnitude: 0.88 
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 19-JUL-08 23:10:00 to 19-JUL-08 23:10:00 (CST-6)
Location: LONG LAKE COLONY
Magnitude: 1.75 
Reported by: Public

Hail in STANLEY, SOUTH DAKOTA
From 18-JUL-08 22:18:00 to 18-JUL-08 22:18:00 (MST-7)
Location: FT PIERRE
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in MCPHERSON, SOUTH DAKOTA
From 19-JUL-08 19:00:00 to 19-JUL-08 19:00:00 (CST-6)
Location: EUREKA
Magnitude: 0.75 
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 19-JUL-08 19:05:00 to 19-JUL-08 19:05:00 (CST-6)
Location: EUREKA
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in MCPHERSON, SOUTH DAKOTA
From 19-JUL-08 22:43:00 to 19-JUL-08 22:43:00 (CST-6)
Location: LEOLA
Magnitude: 1.50 
Reported by: Trained Spotter

Thunderstorm Wind in SULLY, SOUTH DAKOTA
From 18-JUL-08 23:45:00 to 18-JUL-08 23:45:00 (CST-6)
Location: ONIDA
Magnitude: 68.00 MG
Reported by: Mesonet

Damaging thunderstorm winds downed six power poles between Sully Buttes and Onida knocking power out to over 800 homes in and around Onida.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 18-JUL-08 18:05:00 to 18-JUL-08 18:05:00 (MST-7)
Location: ATHBOY
Magnitude: 52.00 EG
Reported by: Public