A cluster of storms eventually merged into one strong cell east of the Aberdeen area during the afternoon with numerous large hail and damaging wind reports. Hail topped out at baseball diameter and winds peaked at 90 mph. The system also produced a tornado before dissipating.

Tornado in DAY, SOUTH DAKOTA
From 22-AUG-21 18:55:00 to 22-AUG-21 18:56:00 (CST-6)
Location: WEBSTER MUNI ARPT
Tornado F-scale: EF0
Reported by: Public

A brief touchdown of a tornado occurred with no damage reported.

Hail in EDMUNDS, SOUTH DAKOTA
From 22-AUG-21 15:58:00 to 22-AUG-21 15:58:00 (CST-6)
Location: LOYALTON
Magnitude: 1.75 
Reported by: Public

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 22-AUG-21 16:29:00 to 22-AUG-21 16:29:00 (CST-6)
Location: MINA
Magnitude: 65.00 MG
Reported by: Mesonet

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:30:00 to 22-AUG-21 16:30:00 (CST-6)
Location: RICHMOND
Magnitude: 76.00 MG
Reported by: Mesonet

Hail in EDMUNDS, SOUTH DAKOTA
From 22-AUG-21 16:32:00 to 22-AUG-21 16:32:00 (CST-6)
Location: MINA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:33:00 to 22-AUG-21 16:33:00 (CST-6)
Location: RICHMOND
Magnitude: 70.00 MG
Reported by: Mesonet

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:34:00 to 22-AUG-21 16:34:00 (CST-6)
Location: RICHMOND
Magnitude: 78.00 MG
Reported by: Mesonet

Hail in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:38:00 to 22-AUG-21 16:38:00 (CST-6)
Location: RICHMOND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:44:00 to 22-AUG-21 16:44:00 (CST-6)
Location: ABERDEEN
Magnitude: 69.00 MG
Reported by: Emergency Manager

Hail in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:57:00 to 22-AUG-21 16:57:00 (CST-6)
Location: COLUMBIA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in EDMUNDS, SOUTH DAKOTA
From 22-AUG-21 17:00:00 to 22-AUG-21 17:00:00 (CST-6)
Location: MINA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:44:00 to 22-AUG-21 16:44:00 (CST-6)
Location: ABERDEEN
Magnitude: 75.00 MG
Reported by: Mesonet

Hail in BROWN, SOUTH DAKOTA
From 22-AUG-21 17:24:00 to 22-AUG-21 17:24:00 (CST-6)
Location: WARNER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 22-AUG-21 17:25:00 to 22-AUG-21 17:25:00 (CST-6)
Location: LANGFORD
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SPINK, SOUTH DAKOTA
From 22-AUG-21 17:36:00 to 22-AUG-21 17:36:00 (CST-6)
Location: DUXBURY
Magnitude: 2.75 
Reported by: Public

Hail in SPINK, SOUTH DAKOTA
From 22-AUG-21 17:40:00 to 22-AUG-21 17:40:00 (CST-6)
Location: DUXBURY
Magnitude: 2.00 
Reported by: Public

Hail in SPINK, SOUTH DAKOTA
From 22-AUG-21 17:48:00 to 22-AUG-21 17:48:00 (CST-6)
Location: DUXBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Funnel Cloud in SPINK, SOUTH DAKOTA
From 22-AUG-21 18:05:00 to 22-AUG-21 18:05:00 (CST-6)
Location: CONDE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DAY, SOUTH DAKOTA
From 22-AUG-21 18:18:00 to 22-AUG-21 18:18:00 (CST-6)
Location: CRANDALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DAY, SOUTH DAKOTA
From 22-AUG-21 12:49:00 to 22-AUG-21 12:49:00 (CST-6)
Location: WAUBAY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 22-AUG-21 15:33:00 to 22-AUG-21 15:33:00 (CST-6)
Location: ROSCOE
Magnitude: 65.00 EG
Reported by: Public

A small outbuilding was destroyed by estimated 75 mph winds.

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 22-AUG-21 15:38:00 to 22-AUG-21 15:38:00 (CST-6)
Location: BEEBE
Magnitude: 65.00 EG
Reported by: Trained Spotter

Several livestock shelters were destroyed by estimated 75 mph winds.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:45:00 to 22-AUG-21 16:45:00 (CST-6)
Location: RICHMOND
Magnitude: 65.00 EG
Reported by: Emergency Manager

Large branches were downed and power poles were leaning from estimated 75 mph winds.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:50:00 to 22-AUG-21 16:50:00 (CST-6)
Location: ABERDEEN
Magnitude: 61.00 EG
Reported by: Public

Power lines were downed on the northeast side of Aberdeen by estimated 70 mph winds.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 16:57:00 to 22-AUG-21 16:57:00 (CST-6)
Location: COLUMBIA
Magnitude: 65.00 EG
Reported by: Emergency Manager

Large trees were downed and major crop damage occurred from estimated 75 mph winds.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 22-AUG-21 17:00:00 to 22-AUG-21 17:00:00 (CST-6)
Location: COLUMBIA
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Branches of 6 to 7 inches in diameter were downed by estimated 75 mph winds.