A strong upper level low lifting across the region combined with high low level moisture, strong deep layer shear, and strong low level winds resulted in several supercell thunderstorms across the region. Large hail up to the size of golf balls along with a few tornadoes occurred.

Hail in LYMAN, SOUTH DAKOTA
From 24-MAY-08 15:45:00 to 24-MAY-08 15:45:00 (CST-6)
Location: KENNEBEC
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HYDE, SOUTH DAKOTA
From 24-MAY-08 16:34:00 to 24-MAY-08 16:34:00 (CST-6)
Location: STEPHAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in DEWEY, SOUTH DAKOTA
From 24-MAY-08 15:50:00 to 24-MAY-08 15:50:00 (MST-7)
Location: PARADE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in DEWEY, SOUTH DAKOTA
From 24-MAY-08 15:50:00 to 24-MAY-08 15:50:00 (MST-7)
Location: THATCHER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 24-MAY-08 16:55:00 to 24-MAY-08 16:55:00 (CST-6)
Location: REE HGTS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in CORSON, SOUTH DAKOTA
From 24-MAY-08 16:00:00 to 24-MAY-08 16:00:00 (MST-7)
Location: THUNDER HAWK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CORSON, SOUTH DAKOTA
From 24-MAY-08 16:05:00 to 24-MAY-08 16:15:00 (MST-7)
Location: KELDRON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CORSON, SOUTH DAKOTA
From 24-MAY-08 16:35:00 to 24-MAY-08 16:45:00 (MST-7)
Location: THUNDER HAWK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large amount of pea to nickel hail piled up to nearly a foot in spots.

Funnel Cloud in HAND, SOUTH DAKOTA
From 24-MAY-08 16:55:00 to 24-MAY-08 16:55:00 (CST-6)
Location: REE HGTS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Funnel Cloud in BROWN, SOUTH DAKOTA
From 24-MAY-08 17:55:00 to 24-MAY-08 17:55:00 (CST-6)
Location: GAGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Funnel Cloud in BROWN, SOUTH DAKOTA
From 24-MAY-08 18:00:00 to 24-MAY-08 18:00:00 (CST-6)
Location: WESTPORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Funnel Cloud in BROWN, SOUTH DAKOTA
From 24-MAY-08 18:27:00 to 24-MAY-08 18:27:00 (CST-6)
Location: FREDERICK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in DEWEY, SOUTH DAKOTA
From 24-MAY-08 15:18:00 to 24-MAY-08 15:19:00 (MST-7)
Location: PARADE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A supercell thunderstorm produced it's fourth tornado as it moved from Ziebach County in Rapid City's warning area into Dewey county in Aberdeen's warning area. The tornado touched down briefly and blew down part of an old barn and destroyed two old sheds.

Tornado in DEWEY, SOUTH DAKOTA
From 24-MAY-08 15:22:00 to 24-MAY-08 15:23:00 (MST-7)
Location: PARADE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A sixth tornado from a supercell thunderstorm touched down briefly to the southeast of Parade. No damage occurred with this tornado.

Tornado in DEWEY, SOUTH DAKOTA
From 24-MAY-08 15:24:00 to 24-MAY-08 15:36:00 (MST-7)
Location: THATCHER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

The seventh and final tornado touched down southeast of Parade in Dewey County. The tornado was a quarter mile wide and moved across open grassland for twelve minutes.

Hail in MARSHALL, SOUTH DAKOTA
From 24-MAY-08 20:02:00 to 24-MAY-08 20:02:00 (CST-6)
Location: BRITTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DEWEY, SOUTH DAKOTA
From 24-MAY-08 16:40:00 to 24-MAY-08 16:40:00 (MST-7)
Location: PROMISE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in EDMUNDS, SOUTH DAKOTA
From 24-MAY-08 17:58:00 to 24-MAY-08 17:58:00 (CST-6)
Location: MINA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 24-MAY-08 18:00:00 to 24-MAY-08 18:00:00 (CST-6)
Location: RICHMOND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 24-MAY-08 18:20:00 to 24-MAY-08 18:20:00 (CST-6)
Location: BARNARD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROWN, SOUTH DAKOTA
From 24-MAY-08 18:30:00 to 24-MAY-08 18:30:00 (CST-6)
Location: WINSHIP
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DEUEL, SOUTH DAKOTA
From 25-MAY-08 06:43:00 to 25-MAY-08 06:43:00 (CST-6)
Location: GARY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DEUEL, SOUTH DAKOTA
From 25-MAY-08 06:45:00 to 25-MAY-08 06:45:00 (CST-6)
Location: GARY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DEUEL, SOUTH DAKOTA
From 25-MAY-08 06:45:00 to 25-MAY-08 06:45:00 (CST-6)
Location: GARY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYMAN, SOUTH DAKOTA
From 24-MAY-08 14:45:00 to 24-MAY-08 14:45:00 (CST-6)
Location: PRESHO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Tornado in DEWEY, SOUTH DAKOTA
From 24-MAY-08 15:21:00 to 24-MAY-08 15:22:00 (MST-7)
Location: THATCHER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

The fifth tornado from a northeast moving supercell thunderstorm touched down in Dewey county. The tornado touched down briefly in an open field with no damage occurring.

Hail in BROWN, SOUTH DAKOTA
From 24-MAY-08 18:20:00 to 24-MAY-08 18:20:00 (CST-6)
Location: WESTPORT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement