A strong warm front brought many severe thunderstorms to northeast South Dakota. Large hail up to tennis ball size, damaging winds, along with a tornado occurred across the region.

Hail in BROWN, SOUTH DAKOTA
From 17-JUN-12 16:45:00 to 17-JUN-12 16:45:00 (CST-6)
Location: HUFFTON
Magnitude: 1.00 
Reported by: Public

Hail in MARSHALL, SOUTH DAKOTA
From 17-JUN-12 16:55:00 to 17-JUN-12 16:55:00 (CST-6)
Location: HILLHEAD
Magnitude: 2.50 
Reported by: Emergency Manager

Hail in BROWN, SOUTH DAKOTA
From 17-JUN-12 17:05:00 to 17-JUN-12 17:05:00 (CST-6)
Location: JAMES
Magnitude: 2.25 
Reported by: Public

Pool ball size hail caused significant crop damage along with damage to the pickup truck.

Hail in DAY, SOUTH DAKOTA
From 17-JUN-12 17:05:00 to 17-JUN-12 17:05:00 (CST-6)
Location: ROSLYN
Magnitude: 1.50 
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 17-JUN-12 17:15:00 to 17-JUN-12 17:15:00 (CST-6)
Location: GROTON MUNI ARPT
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in BROWN, SOUTH DAKOTA
From 17-JUN-12 17:45:00 to 17-JUN-12 17:45:00 (CST-6)
Location: JAMES
Magnitude: 1.75 
Reported by: Public

Hail in ROBERTS, SOUTH DAKOTA
From 17-JUN-12 18:10:00 to 17-JUN-12 18:10:00 (CST-6)
Location: ORTLEY
Magnitude: 1.50 
Reported by: Public

Hail in ROBERTS, SOUTH DAKOTA
From 17-JUN-12 18:15:00 to 17-JUN-12 18:15:00 (CST-6)
Location: ORTLEY
Magnitude: 1.00 
Reported by: Public

Funnel Cloud in CODINGTON, SOUTH DAKOTA
From 17-JUN-12 19:10:00 to 17-JUN-12 19:10:00 (CST-6)
Location: FOLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud was reported by a trained spotter.

Hail in MARSHALL, SOUTH DAKOTA
From 17-JUN-12 16:20:00 to 17-JUN-12 16:20:00 (CST-6)
Location: HILLHEAD
Magnitude: 1.50 
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 17-JUN-12 16:29:00 to 17-JUN-12 16:29:00 (CST-6)
Location: RICHMOND
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in MARSHALL, SOUTH DAKOTA
From 17-JUN-12 16:30:00 to 17-JUN-12 16:30:00 (CST-6)
Location: HILLHEAD
Magnitude: 2.50 
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 17-JUN-12 16:35:00 to 17-JUN-12 16:35:00 (CST-6)
Location: ORDWAY
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in HAMLIN, SOUTH DAKOTA
From 17-JUN-12 18:44:00 to 17-JUN-12 18:44:00 (CST-6)
Location: HAZEL
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in CODINGTON, SOUTH DAKOTA
From 17-JUN-12 19:23:00 to 17-JUN-12 19:23:00 (CST-6)
Location: (ATY)WATERTOWN ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in GRANT, SOUTH DAKOTA
From 17-JUN-12 19:25:00 to 17-JUN-12 19:25:00 (CST-6)
Location: LABOLT
Magnitude: 1.50 
Reported by: Public

Hail in GRANT, SOUTH DAKOTA
From 17-JUN-12 19:25:00 to 17-JUN-12 19:25:00 (CST-6)
Location: MILBANK
Magnitude: 1.00 
Reported by: Public

Hail in GRANT, SOUTH DAKOTA
From 17-JUN-12 19:35:00 to 17-JUN-12 19:35:00 (CST-6)
Location: ALBEE
Magnitude: 1.00 
Reported by: Public

Hail in CODINGTON, SOUTH DAKOTA
From 17-JUN-12 19:42:00 to 17-JUN-12 19:42:00 (CST-6)
Location: KRANZBURG
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in CODINGTON, SOUTH DAKOTA
From 17-JUN-12 19:43:00 to 17-JUN-12 19:43:00 (CST-6)
Location: KRANZBURG
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in DEUEL, SOUTH DAKOTA
From 17-JUN-12 20:00:00 to 17-JUN-12 20:00:00 (CST-6)
Location: ALTAMONT
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in ROBERTS, SOUTH DAKOTA
From 17-JUN-12 17:55:00 to 17-JUN-12 17:55:00 (CST-6)
Location: PEEVER
Magnitude: 70.00 EG
Reported by: Emergency Manager

Eighty mph winds tipped over a pickup and a trailer just east of Interstate-90.

Tornado in ROBERTS, SOUTH DAKOTA
From 17-JUN-12 18:00:00 to 17-JUN-12 18:01:00 (CST-6)
Location: PEEVER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Brief touchdown in a field.

Thunderstorm Wind in ROBERTS, SOUTH DAKOTA
From 17-JUN-12 17:56:00 to 17-JUN-12 17:56:00 (CST-6)
Location: PEEVER
Magnitude: 78.00 EG
Reported by: NWS Storm Survey

An estimated ninety mph wind first caused roof and siding damage to a home just west of Peever.  A storage building on the northwest edge of town was blown off of its foundation with debris blow downwind. Several large trees were blown down along with many large tree branches. Additionally, the side wall of a lumber storage facility was blown off of its foundation but remained on the building in Peever.

Thunderstorm Wind in GRANT, SOUTH DAKOTA
From 17-JUN-12 18:45:00 to 17-JUN-12 18:45:00 (CST-6)
Location: BIG STONE CITY
Magnitude: 87.00 EG
Reported by: NWS Storm Survey

An estimated 100 mph winds destroyed two garages with flying debris damaging a house northeast of the garages in Big Stone City. Extensive tree damage occurred in town with trees down and along with many branches. The main structural damage in town was shingle damage and windows blown in that were facing the wind. Some metal siding was blown off the cheese factory on the northwest side of town with the roof of a towing/repair business across the road sustaining roof damage.

Tornado in ROBERTS, SOUTH DAKOTA
From 17-JUN-12 18:53:00 to 17-JUN-12 18:58:00 (CST-6)
Location: CORONA
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A brief tornado touchdown occurred in Cramers Resorts.  The touchdown occurred roughly in the middle of the resort with damage occurring to two mobile homes and an outbuilding. There was quite a bit of structural and tree damage at the resort. Several cabins sustained major structural damage with roof sections missing and partial or total wall collapses.  Several trees were downed along with many tree branches.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 17-JUN-12 16:49:00 to 17-JUN-12 16:49:00 (CST-6)
Location: (ABR)ABERDEEN RGNL A
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS