Severe thunderstorms developed across eastern Butte County and moved across northern Meade, southern Perkins, and Ziebach Counties. The storms produced hail as large as quarters and wind gusts to 65 mph and two tornadoes in Ziebach County.

Hail in BUTTE, SOUTH DAKOTA
From 12-MAY-09 15:20:00 to 12-MAY-09 15:20:00 (MST-7)
Location: HOOVER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ZIEBACH, SOUTH DAKOTA
From 12-MAY-09 16:45:00 to 12-MAY-09 16:45:00 (MST-7)
Location: DUPREE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 12-MAY-09 15:50:00 to 12-MAY-09 15:50:00 (MST-7)
Location: OPAL
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in ZIEBACH, SOUTH DAKOTA
From 12-MAY-09 16:28:00 to 12-MAY-09 16:28:00 (MST-7)
Location: RED ELM
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser briefly observed a small tornado before rain obscured his view. Its location, length, and width were estimated. No damage was reported.

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 12-MAY-09 15:45:00 to 12-MAY-09 15:45:00 (MST-7)
Location: ZEONA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

None.

Hail in MEADE, SOUTH DAKOTA
From 12-MAY-09 15:35:00 to 12-MAY-09 15:35:00 (MST-7)
Location: MUD BUTTE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in PERKINS, SOUTH DAKOTA
From 12-MAY-09 16:11:00 to 12-MAY-09 16:11:00 (MST-7)
Location: USTA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

None.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 12-MAY-09 16:15:00 to 12-MAY-09 16:15:00 (MST-7)
Location: OPAL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

None.

Thunderstorm Wind in MEADE, SOUTH DAKOTA
From 12-MAY-09 16:24:00 to 12-MAY-09 16:24:00 (MST-7)
Location: (D07)FAITH ARPT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in ZIEBACH, SOUTH DAKOTA
From 12-MAY-09 16:50:00 to 12-MAY-09 16:50:00 (MST-7)
Location: DUPREE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in ZIEBACH, SOUTH DAKOTA
From 12-MAY-09 16:25:00 to 12-MAY-09 16:25:00 (MST-7)
Location: RED ELM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ZIEBACH, SOUTH DAKOTA
From 12-MAY-09 16:45:00 to 12-MAY-09 16:45:00 (MST-7)
Location: DUPREE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in ZIEBACH, SOUTH DAKOTA
From 12-MAY-09 16:40:00 to 12-MAY-09 16:50:00 (MST-7)
Location: RED ELM
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down west of Dupree and tracked eastward before dissipating northeast of Dupree. It dented several grain bins, blew over a small mobile home and semi trailer truck, tore sheet metal off sheds, and toppled a large communications tower.

Thunderstorm Wind in BUTTE, SOUTH DAKOTA
From 12-MAY-09 15:20:00 to 12-MAY-09 15:20:00 (MST-7)
Location: HOOVER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

None.