A strong upper level low pressure trough along with a surface cold front interacting with unstable air brought severe thunderstorms to the eastern parts of the region. Several tornadoes, large hail, damaging winds, along with some isolated flooding occurred.

Flood in CODINGTON, SOUTH DAKOTA
From 19-SEP-17 22:15:00 to 20-SEP-17 01:15:00 (CST-6)
Location: (ATY)WATERTOWN ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rains of 1 to 3 inches falling over a short period of time brought street flooding to parts of Watertown. There were a few vehicles stalled with search and rescue crews barricading roads that were underwater.

Hail in MCPHERSON, SOUTH DAKOTA
From 19-SEP-17 13:04:00 to 19-SEP-17 13:04:00 (CST-6)
Location: LANGLAKE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 19-SEP-17 13:12:00 to 19-SEP-17 13:12:00 (CST-6)
Location: LANGLAKE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 19-SEP-17 13:55:00 to 19-SEP-17 13:55:00 (CST-6)
Location: LONG LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WALWORTH, SOUTH DAKOTA
From 19-SEP-17 17:45:00 to 19-SEP-17 17:45:00 (CST-6)
Location: JAVA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WALWORTH, SOUTH DAKOTA
From 19-SEP-17 17:51:00 to 19-SEP-17 17:51:00 (CST-6)
Location: JAVA
Magnitude: 1.75 
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 19-SEP-17 18:00:00 to 19-SEP-17 18:00:00 (CST-6)
Location: RICHMOND
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 19-SEP-17 18:04:00 to 19-SEP-17 18:04:00 (CST-6)
Location: VAYLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in EDMUNDS, SOUTH DAKOTA
From 19-SEP-17 18:12:00 to 19-SEP-17 18:12:00 (CST-6)
Location: HOSMER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in EDMUNDS, SOUTH DAKOTA
From 19-SEP-17 18:15:00 to 19-SEP-17 18:15:00 (CST-6)
Location: HOSMER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in BROWN, SOUTH DAKOTA
From 19-SEP-17 18:17:00 to 19-SEP-17 18:17:00 (CST-6)
Location: WESTPORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in BROWN, SOUTH DAKOTA
From 19-SEP-17 18:17:00 to 19-SEP-17 18:17:00 (CST-6)
Location: FREDERICK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 19-SEP-17 18:25:00 to 19-SEP-17 18:25:00 (CST-6)
Location: HILLSVIEW
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in BROWN, SOUTH DAKOTA
From 19-SEP-17 18:49:00 to 19-SEP-17 18:49:00 (CST-6)
Location: HOUGHTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BROWN, SOUTH DAKOTA
From 19-SEP-17 19:08:00 to 19-SEP-17 19:08:00 (CST-6)
Location: HOUGHTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in SPINK, SOUTH DAKOTA
From 19-SEP-17 19:50:00 to 19-SEP-17 19:50:00 (CST-6)
Location: DOLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in SPINK, SOUTH DAKOTA
From 19-SEP-17 18:46:00 to 19-SEP-17 18:57:00 (CST-6)
Location: TULARE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A tornado touched down 5.5 miles south southwest of Tulare, uprooting a large cottonwood tree in a field. The tornado then passed over pasture and cropland before reaching a residence about 3 miles southwest of Tulare. Large tree branches were broke around the farm yard. On the north side of the farm an outbuilding had significant structural and roof damage with tin from the roof lofted over a half mile to the north. Additionally, two trees were uprooted along the north edge of the property. The tornado continued to track through a soybean field with slight crop damage and debris evident along the path. About 2.8 miles southwest of Tulare an irrigation unit was toppled and the corn crop was leveled before the tornado lifted.

Tornado in CLARK, SOUTH DAKOTA
From 19-SEP-17 19:55:00 to 19-SEP-17 19:56:00 (CST-6)
Location: CLARK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched downed briefly in an open field with no damage occurring.

Tornado in CLARK, SOUTH DAKOTA
From 19-SEP-17 20:26:00 to 19-SEP-17 20:27:00 (CST-6)
Location: BRADLEY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tornado touched down briefly near Bradley. No damage was reported.

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 19-SEP-17 18:05:00 to 19-SEP-17 18:05:00 (CST-6)
Location: BOWDLE
Magnitude: 52.00 EG
Reported by: Public

Sixty mph winds along with ping pong size hail caused broken windows along with stripping some corn.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 19-SEP-17 19:33:00 to 19-SEP-17 19:37:00 (CST-6)
Location: JAMES
Magnitude: 65.00 EG
Reported by: NWS Storm Survey

Seventy-five mph winds caused a partial loss to the roof of a large metal building 5 miles south of James. There was also tree and crop damage from this location to 3 miles south of James.

Hail in EDMUNDS, SOUTH DAKOTA
From 19-SEP-17 18:05:00 to 19-SEP-17 18:05:00 (CST-6)
Location: BOWDLE
Magnitude: 1.50 
Reported by: Public