A cold front pushing across central South Dakota and Nebraska ignited severe storms overnight. With elevated instability of 1000-1500 J/kg and an increasing low-level jet, numerous storms formed along the 700 hPa baroclinic zone with a few taking on bowing characteristics.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 10-AUG-20 02:25:00 to 10-AUG-20 02:27:00 (CST-6)
Location: LOOMIS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Trained Spotter

Numerous two-inch diameter tree branches downed in the yard. Property damage costs are rough estimates.

Thunderstorm Wind in CHARLES MIX, SOUTH DAKOTA
From 10-AUG-20 04:24:00 to 10-AUG-20 04:27:00 (CST-6)
Location: GEDDES
Magnitude: 61.00 EG
Property damage: 13.00K
Reported by: Trained Spotter

Three utility poles were snapped off above the ground.  Property cost amounts are rough estimates.

Thunderstorm Wind in GREGORY, SOUTH DAKOTA
From 10-AUG-20 04:37:00 to 10-AUG-20 04:39:00 (CST-6)
Location: FT RANDALL
Magnitude: 53.00 MG
Reported by: Mesonet

South Dakota RWIS station SD588 near Fort Randall Dam measured a peak wind gust of 61 mph.

Hail in GREGORY, SOUTH DAKOTA
From 10-AUG-20 03:33:00 to 10-AUG-20 03:35:00 (CST-6)
Location: GREGORY
Magnitude: 2.00 
Reported by: Public

Hail in GREGORY, SOUTH DAKOTA
From 10-AUG-20 03:54:00 to 10-AUG-20 03:56:00 (CST-6)
Location: BURKE MUNI ARPT
Magnitude: 1.25 
Reported by: Social Media

Thunderstorm Wind in CHARLES MIX, SOUTH DAKOTA
From 10-AUG-20 04:45:00 to 10-AUG-20 04:48:00 (CST-6)
Location: LAKE ANDES
Magnitude: 56.00 EG
Property damage: 10.00K
Reported by: Law Enforcement

Extensive tree damage was reported throughout Lake Andes.  Property damage costs are rough estimates.

Hail in AURORA, SOUTH DAKOTA
From 10-AUG-20 01:50:00 to 10-AUG-20 01:52:00 (CST-6)
Location: PLANKINTON
Magnitude: 1.75 
Reported by: Public

Hail in GREGORY, SOUTH DAKOTA
From 10-AUG-20 03:54:00 to 10-AUG-20 03:56:00 (CST-6)
Location: LUCAS
Magnitude: 1.00 
Reported by: Public

Hail in GREGORY, SOUTH DAKOTA
From 10-AUG-20 03:58:00 to 10-AUG-20 03:58:00 (CST-6)
Location: BURKE MUNI ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in GREGORY, SOUTH DAKOTA
From 10-AUG-20 04:16:00 to 10-AUG-20 04:19:00 (CST-6)
Location: FAIRFAX
Magnitude: 63.00 MG
Reported by: Mesonet

Personal weather station EW7290 near Fairfax measured a peak wind gust of 73 mph.

Thunderstorm Wind in CHARLES MIX, SOUTH DAKOTA
From 10-AUG-20 04:55:00 to 10-AUG-20 04:58:00 (CST-6)
Location: WAGNER ARPT
Magnitude: 53.00 MG
Reported by: AWOS

Automated weather station KAGZ near Wagner measured a peak wind gust of 61 mph.

Hail in BON HOMME, SOUTH DAKOTA
From 10-AUG-20 05:33:00 to 10-AUG-20 05:35:00 (CST-6)
Location: TYNDALL
Magnitude: 1.00 
Reported by: COOP Observer

Hail in BON HOMME, SOUTH DAKOTA
From 10-AUG-20 05:35:00 to 10-AUG-20 05:37:00 (CST-6)
Location: TYNDALL
Magnitude: 1.00 
Reported by: COOP Observer

Hail was enough to cover the ground, and was accompanied by winds around 45 mph.

Hail in BON HOMME, SOUTH DAKOTA
From 10-AUG-20 05:42:00 to 10-AUG-20 05:44:00 (CST-6)
Location: SCOTLAND
Magnitude: 1.00 
Crop damage: 26.00K
Reported by: Public

Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.

Lightning in UNION, SOUTH DAKOTA
From 10-AUG-20 07:38:00 to 10-AUG-20 07:38:00 (CST-6)
Location: MC COOK LAKE
Property damage: 2.50M
Reported by: Broadcast Media

Lightning struck a single-story apartment building and initiated a fire which burned through the entire attic of the building. Crews from North Sioux City and three nearby cities attacked the fire for around two hours. All twenty apartments were severely damaged, displacing all residents. Property damage costs are rough estimates.