After a snow storm on May 9-10 left a liquid equivalent of one to three inches of precipitation over southwestern South Dakota and northwestern Nebraska, additional rain combined with the melting snow to cause flooding in the White River, Cheyenne River, and Bad River basins. Record flooding was recorded on the White River in Shannon County.

Flood in OGLALA LAKOTA, SOUTH DAKOTA
From 13-MAY-15 20:00:00 to 14-MAY-15 21:30:00 (MST-7)
Location: OGLALA
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the White River.

Flood in OGLALA LAKOTA, SOUTH DAKOTA
From 15-MAY-15 18:45:00 to 19-MAY-15 17:00:00 (MST-7)
Location: OGLALA
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Record flooding occurred along the White River from the Nebraska state line to Badlands National Park. The White River was over 200 yards wide and at least two feet deep on BIA Highway 41 north of Oglala, where a vehicle was swept off the highway and the passengers had to be rescued. BIA Highway 32 near Slim Butte was washed out and a culvert on BIA Highway 27 washed out and the road was damaged north of Rockyford.

Flood in JACKSON, SOUTH DAKOTA
From 17-MAY-15 05:00:00 to 17-MAY-15 12:00:00 (MST-7)
Location: COTTONWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the South Fork of the Bad River and its tributaries.

Flood in HAAKON, SOUTH DAKOTA
From 17-MAY-15 07:00:00 to 17-MAY-15 14:00:00 (MST-7)
Location: PHILIP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the South Fork of the Bad River and its tributaries.

Flood in PENNINGTON, SOUTH DAKOTA
From 16-MAY-15 13:30:00 to 16-MAY-15 17:30:00 (MST-7)
Location: WASTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the Cheyenne River. At the Interstate 90 eastbound rest area near Wasta, water overflowed into the parking lot and surrounded the building.

Flood in ZIEBACH, SOUTH DAKOTA
From 17-MAY-15 14:45:00 to 17-MAY-15 20:00:00 (MST-7)
Location: BRIDGER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the Cheyenne River.

Flood in HAAKON, SOUTH DAKOTA
From 17-MAY-15 02:45:00 to 17-MAY-15 20:00:00 (MST-7)
Location: MILESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the Cheyenne River.

Flood in JACKSON, SOUTH DAKOTA
From 17-MAY-15 23:45:00 to 19-MAY-15 22:00:00 (MST-7)
Location: INTERIOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding of agricultural land occurred along the White River.

Flood in JACKSON, SOUTH DAKOTA
From 16-MAY-15 19:00:00 to 17-MAY-15 23:25:00 (MST-7)
Location: INTERIOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Highway 44 and a campground near Interior were flooded due to runoff from more than two inches of rain and high water in the White River.