A cold front brought the threat of severe thunderstorms to northeast South Dakota on the afternoon and evening of August 10th. Initially, individual storms presented both a hail and wind threat in the James Valley, with reports of golfball sized hail in Brown and Hand counties. As the storms moved east into the Prairie Coteau region, they organized into a broken line and presented more of a wind threat. The Department of Transportation mesonet station 6 miles west of Henry recorded a 74 mph wind gust, and the nearby town of Henry also experienced damage to trees. There was also a pair of brief tornado touchdowns farther to the south associated with one of the stronger cells embedded within this line, though no damage was ever noted.

Tornado in CLARK, SOUTH DAKOTA
From 10-AUG-23 18:47:00 to 10-AUG-23 18:49:00 (CST-6)
Location: WILLOW LAKE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement and a storm chaser reported the brief touchdown of a tornado in an open field. The tornado path was later visible on hi-resolution satellite imagery.

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-23 17:35:00 to 10-AUG-23 17:35:00 (CST-6)
Location: LAKE CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public was contacted and they estimated the wind speed at 65 mph.

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-23 17:46:00 to 10-AUG-23 17:46:00 (CST-6)
Location: LAKE CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The individual reported an estimated peak thunderstorm wind speed of 60 mph.

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 10-AUG-23 18:11:00 to 10-AUG-23 18:11:00 (CST-6)
Location: ELROD
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ROBERTS, SOUTH DAKOTA
From 10-AUG-23 18:10:00 to 10-AUG-23 18:10:00 (CST-6)
Location: ORTLEY
Magnitude: 61.00 EG
Reported by: Public

A heavy wooden trailer with a water tank on it was blown approximately 150 yards across two ditches before hitting a neighbors house.

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 10-AUG-23 18:46:00 to 10-AUG-23 18:46:00 (CST-6)
Location: WILLOW LAKE
Magnitude: 52.00 EG
Reported by: Emergency Manager

Emergency management reported that thunderstorm winds had blown in the doors on a barn.

Thunderstorm Wind in CODINGTON, SOUTH DAKOTA
From 10-AUG-23 18:15:00 to 10-AUG-23 18:15:00 (CST-6)
Location: HENRY
Magnitude: 65.00 EG
Reported by: Public

Thunderstorm winds knocked down three trees in town. A 3-4 inch diameter branch from another tree was blown off, impaling a nearby home.

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 10-AUG-23 17:45:00 to 10-AUG-23 17:45:00 (CST-6)
Location: WEBSTER MUNI ARPT
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter reported wind damage to his corn field.

Funnel Cloud in HAMLIN, SOUTH DAKOTA
From 10-AUG-23 18:34:00 to 10-AUG-23 18:36:00 (CST-6)
Location: HAYTI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser reported a funnel cloud which lasted approximately 2 minutes, and that no surface circulation was observed.

Hail in BROWN, SOUTH DAKOTA
From 10-AUG-23 15:45:00 to 10-AUG-23 15:45:00 (CST-6)
Location: WARNER
Magnitude: 1.75 
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 10-AUG-23 16:25:00 to 10-AUG-23 16:25:00 (CST-6)
Location: ST LAWRENCE
Magnitude: 1.75 
Reported by: Public

A member of the public reported that the storm generated quarter to golfball sized hail, enough to completely cover the ground.

Hail in SPINK, SOUTH DAKOTA
From 10-AUG-23 17:09:00 to 10-AUG-23 17:09:00 (CST-6)
Location: TURTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 10-AUG-23 15:40:00 to 10-AUG-23 15:40:00 (CST-6)
Location: WETONKA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds were strong enough to blow the property off of this individuals patio.

Thunderstorm Wind in SPINK, SOUTH DAKOTA
From 10-AUG-23 16:57:00 to 10-AUG-23 16:57:00 (CST-6)
Location: CONDE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet