Despite weaker pre-storm deep-layer shear on the order of 25-30 knots and fairly narrow instability profiles of 1000-1500 J/kg, modifications on the storm scale and an increase in the low-level jet improved the environment enough to support several long-lived supercell clusters along a weak frontal boundary. Storms moving through the Sioux Falls area forced an early cancellation of the Sioux Empire Fair.

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:50:00 to 05-AUG-21 19:52:00 (CST-6)
Location: RENNER
Magnitude: 3.50 
Property damage: 500.00K
Crop damage: 175.00K
Reported by: Social Media

Large hail produced significant roof damage along a path from south of Dell Rapids to Renner to near Brandon. The most significant damage occurred near Renner where 2 to 3.5 inch hail was reported. Property damage costs are a rough estimate. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:59:00 to 05-AUG-21 20:01:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: NWS Employee

Thunderstorm winds downed several large tree limbs at the Mary Jo Wegner Arboretum, some as large as one foot in diameter. Property damage costs are a rough estimate.

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 22:38:00 to 05-AUG-21 22:40:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 0.88 
Reported by: NWS Employee

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 22:49:00 to 05-AUG-21 22:51:00 (CST-6)
Location: CROOKS
Magnitude: 1.00 
Reported by: Social Media

Hail in LINCOLN, SOUTH DAKOTA
From 06-AUG-21 00:06:00 to 06-AUG-21 00:09:00 (CST-6)
Location: CANTON
Magnitude: 1.00 
Reported by: Social Media

Hail in MOODY, SOUTH DAKOTA
From 05-AUG-21 18:15:00 to 05-AUG-21 18:17:00 (CST-6)
Location: COLMAN
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in BROOKINGS, SOUTH DAKOTA
From 05-AUG-21 18:25:00 to 05-AUG-21 18:27:00 (CST-6)
Location: ELKTON
Magnitude: 1.50 
Reported by: Social Media

Hail in BROOKINGS, SOUTH DAKOTA
From 05-AUG-21 18:26:00 to 05-AUG-21 18:28:00 (CST-6)
Location: ELKTON
Magnitude: 1.00 
Reported by: Public

Hail in LAKE, SOUTH DAKOTA
From 05-AUG-21 18:29:00 to 05-AUG-21 18:32:00 (CST-6)
Location: MADISON MUNI ARPT
Magnitude: 1.25 
Reported by: Social Media

Hail in LAKE, SOUTH DAKOTA
From 05-AUG-21 19:00:00 to 05-AUG-21 19:02:00 (CST-6)
Location: WENTWORTH
Magnitude: 1.50 
Crop damage: 1.00K
Reported by: Social Media

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

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:58:00 to 05-AUG-21 20:01:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 65.00 EG
Property damage: 30.00K
Reported by: Public

A portion of a deck overhang and half of the roof was blown off a house by thunderstorm wind gusts.  The roof piece lodged against a neighbors residence. Property damage costs are a rough estimate.

Thunderstorm Wind in LINCOLN, SOUTH DAKOTA
From 05-AUG-21 21:40:00 to 05-AUG-21 21:42:00 (CST-6)
Location: BERESFORD
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 50.00K
Reported by: Trained Spotter

A large tree was knocked down by thunderstorm winds. Property damage costs are a rough estimate. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.

Hail in BROOKINGS, SOUTH DAKOTA
From 05-AUG-21 18:35:00 to 05-AUG-21 18:37:00 (CST-6)
Location: ELKTON
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in MOODY, SOUTH DAKOTA
From 05-AUG-21 18:53:00 to 05-AUG-21 18:55:00 (CST-6)
Location: COLMAN
Magnitude: 1.50 
Reported by: Social Media

Hail in LAKE, SOUTH DAKOTA
From 05-AUG-21 19:00:00 to 05-AUG-21 19:03:00 (CST-6)
Location: WENTWORTH
Magnitude: 1.75 
Reported by: Public

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:55:00 to 05-AUG-21 19:58:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Social Media

Thunderstorm wind gusts uprooted several 8 year old pine trees. Property damage costs are a rough estimate.

Hail in MOODY, SOUTH DAKOTA
From 05-AUG-21 18:43:00 to 05-AUG-21 18:45:00 (CST-6)
Location: COLMAN
Magnitude: 1.50 
Crop damage: 30.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 05-AUG-21 19:15:00 to 05-AUG-21 19:17:00 (CST-6)
Location: TRENT
Magnitude: 56.00 EG
Property damage: 2.00K
Reported by: Social Media

Thunderstorm wind gusts downed several large tree limbs from 6 to 10 inches in diameter. Property damage costs are a rough estimate.

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:24:00 to 05-AUG-21 19:27:00 (CST-6)
Location: DELL RAPIDS
Magnitude: 1.00 
Reported by: Social Media

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:35:00 to 05-AUG-21 19:38:00 (CST-6)
Location: BALTIC
Magnitude: 1.00 
Reported by: Social Media

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:19:00 to 05-AUG-21 19:21:00 (CST-6)
Location: DELL RAPIDS
Magnitude: 56.00 MG
Crop damage: 52.00K
Reported by: Department of Highways

Thunderstorm wind gusts were measured by a South Dakota RWIS station 3 miles west of Dell Rapids, before structural damage rendered the wind gauge inoperable. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.

Hail in MCCOOK, SOUTH DAKOTA
From 05-AUG-21 20:50:00 to 05-AUG-21 20:53:00 (CST-6)
Location: CANISTOTA
Magnitude: 0.88 
Crop damage: 1.00K
Reported by: Social Media

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

Thunderstorm Wind in TURNER, SOUTH DAKOTA
From 05-AUG-21 21:20:00 to 05-AUG-21 21:23:00 (CST-6)
Location: DAVIS
Magnitude: 70.00 EG
Property damage: 50.00K
Reported by: Public

Thunderstorm wind gusts caused extensive structural damage to a house when the back wall was blown out of a garage. Property damage costs are a rough estimate.

Thunderstorm Wind in TURNER, SOUTH DAKOTA
From 05-AUG-21 21:20:00 to 05-AUG-21 21:22:00 (CST-6)
Location: DAVIS
Magnitude: 61.00 EG
Property damage: 5.00K
Reported by: Social Media

Thunderstorms winds removed shingles from a portion of the roof of a house. Property damage costs are a rough estimate.

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:49:00 to 05-AUG-21 19:51:00 (CST-6)
Location: RENNER
Magnitude: 2.50 
Reported by: Social Media

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 19:59:00 to 05-AUG-21 20:02:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 56.00 EG
Property damage: 10.00K
Reported by: Social Media

Thunderstorm winds damaged siding and roofing on a building east of Sioux Falls.

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 20:00:00 to 05-AUG-21 20:04:00 (CST-6)
Location: BRANDON
Magnitude: 1.50 
Reported by: Social Media

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 20:08:00 to 05-AUG-21 20:11:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 1.00 
Reported by: NWS Employee

Hail in MINNEHAHA, SOUTH DAKOTA
From 05-AUG-21 20:10:00 to 05-AUG-21 20:12:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 2.00 
Reported by: NWS Employee