Thunderstorms produced damaging winds at a few places west of the James River, then produced heavy rain and flash flooding along a path near Interstate 90 from Mitchell to Sioux Falls. The storms moved across the area during the evening of July 21st.

Flash Flood in LINCOLN, SOUTH DAKOTA
From 21-JUL-10 22:40:00 to 22-JUL-10 02:30:00 (CST-6)
Location: TEA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain caused flooding of streets in Tea and in the south part of Sioux Falls. Some basements were also flooded.

Flash Flood in MINNEHAHA, SOUTH DAKOTA
From 21-JUL-10 21:50:00 to 22-JUL-10 02:30:00 (CST-6)
Location: ELLIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rainfall of up to 4 inches caused flash flooding of numerous streets in Sioux Falls. Water was high enough to cause several vehicles to stall out.

Heavy Rain in MINNEHAHA, SOUTH DAKOTA
From 21-JUL-10 22:02:00 to 21-JUL-10 22:02:00 (CST-6)
Location: PUMPKIN CENTER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall of 3.30 inches was measured.

Thunderstorm Wind in BRULE, SOUTH DAKOTA
From 21-JUL-10 18:35:00 to 21-JUL-10 18:35:00 (CST-6)
Location: EAGLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds caused tree damage, including several branches blown down.

Flash Flood in DAVISON, SOUTH DAKOTA
From 21-JUL-10 20:00:00 to 22-JUL-10 00:30:00 (CST-6)
Location: LOOMIS
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy rainfall of over 4 inches caused widespread flash flooding of streets, yards, basements, and some homes and businesses in and near Mitchell. Water was up to two feet deep in some streets. Flooded businesses included the Queen of Peace Hospital, where flooding was reported in the emergency department and in a corridor.

Heavy Rain in BEADLE, SOUTH DAKOTA
From 21-JUL-10 20:15:00 to 21-JUL-10 20:15:00 (CST-6)
Location: VIRGIL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rainfall of 2.11 inches was measured.

Thunderstorm Wind in JERAULD, SOUTH DAKOTA
From 21-JUL-10 18:35:00 to 21-JUL-10 18:44:00 (CST-6)
Location: WESSINGTON SPGS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds caused tree damage. The winds were accompanied by heavy rain.

Thunderstorm Wind in BRULE, SOUTH DAKOTA
From 21-JUL-10 17:50:00 to 21-JUL-10 17:50:00 (CST-6)
Location: CHAMBERLAIN ARPT
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused an unknown amount of tree damage.

Flash Flood in CLAY, SOUTH DAKOTA
From 21-JUL-10 23:25:00 to 22-JUL-10 04:30:00 (CST-6)
Location: DAVIDSON ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain caused flash flooding of several streets in Vermillion, resulting in several stalled vehicles.

Flash Flood in HUTCHINSON, SOUTH DAKOTA
From 21-JUL-10 21:30:00 to 21-JUL-10 22:30:00 (CST-6)
Location: FREEMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain caused flooding of streets in and near the town of Freeman. The water was deep enough on streets to result in numerous stalled vehicles.