A slow moving upper level storm system brought severe thunderstorms to southwestern and south central South Dakota. The storms produced hail to golf ball size from Shannon County to Tripp County. Heavy rain across parts of the area also caused creeks and rivers to rise. Some culverts were washed out and several gravel roads across the area were damaged.

Heavy Rain in JACKSON, SOUTH DAKOTA
From 05-MAY-07 10:00:00 to 05-MAY-07 16:00:00 (MST-7)
Location: INTERIOR
Property damage: 67.00K
Crop damage: 0.00K
Reported by: COOP Observer

Almost four inches of rain (3.95) fell in six hours. Water briefly covered highway 44 south of the White River when a culvert plugged up with debris.

Hail in OGLALA LAKOTA, SOUTH DAKOTA
From 05-MAY-07 10:05:00 to 05-MAY-07 10:09:00 (MST-7)
Location: BATESLAND
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENNETT, SOUTH DAKOTA
From 05-MAY-07 10:35:00 to 05-MAY-07 10:40:00 (MST-7)
Location: ALLEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, SOUTH DAKOTA
From 05-MAY-07 10:40:00 to 05-MAY-07 10:56:00 (MST-7)
Location: POTATO CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENNETT, SOUTH DAKOTA
From 05-MAY-07 11:25:00 to 05-MAY-07 11:25:00 (MST-7)
Location: SWETT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, SOUTH DAKOTA
From 05-MAY-07 12:15:00 to 05-MAY-07 12:15:00 (MST-7)
Location: INTERIOR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JACKSON, SOUTH DAKOTA
From 05-MAY-07 12:50:00 to 05-MAY-07 12:50:00 (MST-7)
Location: COTTONWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HAAKON, SOUTH DAKOTA
From 05-MAY-07 13:35:00 to 05-MAY-07 13:35:00 (MST-7)
Location: PHILIP
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in HAAKON, SOUTH DAKOTA
From 05-MAY-07 11:00:00 to 05-MAY-07 17:00:00 (MST-7)
Location: PHILIP
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain fell across southwestern Haakon County and caused minor flooding of a secondary road. Normally dry creeks ran near bankfull for a brief time.

Hail in HAAKON, SOUTH DAKOTA
From 05-MAY-07 13:00:00 to 05-MAY-07 13:00:00 (MST-7)
Location: PHILIP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Rain in JACKSON, SOUTH DAKOTA
From 05-MAY-07 10:00:00 to 05-MAY-07 16:00:00 (MST-7)
Location: POTATO CREEK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

About 3 inches of rain fell during the afternoon. Stock dams filled and water ran over the tops. Minor flooding of some roads was reported.

Heavy Rain in PENNINGTON, SOUTH DAKOTA
From 05-MAY-07 10:00:00 to 05-MAY-07 16:00:00 (MST-7)
Location: WALL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two to four inches of rain fell near the Badlands National Park in far southeastern Pennington County.

Hail in TODD, SOUTH DAKOTA
From 05-MAY-07 16:10:00 to 05-MAY-07 16:10:00 (CST-6)
Location: ST FRANCIS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public