Thunderstorms produced large hail and damaging winds over an area that extended from Huron and White lake southeast to the far southeast corner of the state in Union County. The severe weather took place during the morning hours, starting before daybreak.

Thunderstorm Wind in UNION, SOUTH DAKOTA
From 28-AUG-11 09:15:00 to 28-AUG-11 09:15:00 (CST-6)
Location: JEFFERSON
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds caused tree damage, including several trees blown down. The winds also blew off shingles off a business roof, and blew down power lines, causing a power outage.

Thunderstorm Wind in SANBORN, SOUTH DAKOTA
From 28-AUG-11 06:45:00 to 28-AUG-11 06:45:00 (CST-6)
Location: WOONSOCKET
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew down a scoreboard at a football field, caused tree damage at a cemetery and elsewhere on the northwest side of Woonsocket, and blew down power lines, causing a power outage.

Hail in HUTCHINSON, SOUTH DAKOTA
From 28-AUG-11 06:42:00 to 28-AUG-11 06:42:00 (CST-6)
Location: BEARDSLEY
Magnitude: 1.75 
Property damage: 0.00K
Reported by: Newspaper

Large hail caused an unknown amount of damage to corn crops.

Hail in AURORA, SOUTH DAKOTA
From 28-AUG-11 03:35:00 to 28-AUG-11 03:35:00 (CST-6)
Location: AURORA CENTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HANSON, SOUTH DAKOTA
From 28-AUG-11 04:50:00 to 28-AUG-11 04:50:00 (CST-6)
Location: EPIPHANY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HANSON, SOUTH DAKOTA
From 28-AUG-11 05:00:00 to 28-AUG-11 05:00:00 (CST-6)
Location: EPIPHANY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HANSON, SOUTH DAKOTA
From 28-AUG-11 05:05:00 to 28-AUG-11 05:05:00 (CST-6)
Location: EPIPHANY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BON HOMME, SOUTH DAKOTA
From 28-AUG-11 05:25:00 to 28-AUG-11 05:25:00 (CST-6)
Location: AVON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BON HOMME, SOUTH DAKOTA
From 28-AUG-11 05:30:00 to 28-AUG-11 05:30:00 (CST-6)
Location: SPRINGFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BON HOMME, SOUTH DAKOTA
From 28-AUG-11 05:30:00 to 28-AUG-11 05:30:00 (CST-6)
Location: AVON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HUTCHINSON, SOUTH DAKOTA
From 28-AUG-11 06:31:00 to 28-AUG-11 06:31:00 (CST-6)
Location: FREEMAN
Magnitude: 2.00 
Property damage: 0.00K
Reported by: Trained Spotter

Large hail caused an unknown amount of damage to corp crops.

Hail in BON HOMME, SOUTH DAKOTA
From 28-AUG-11 07:05:00 to 28-AUG-11 07:05:00 (CST-6)
Location: AVON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in SANBORN, SOUTH DAKOTA
From 28-AUG-11 07:05:00 to 28-AUG-11 07:05:00 (CST-6)
Location: FARWELL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds caused tree damage, including several branches blown down.

Hail in BON HOMME, SOUTH DAKOTA
From 28-AUG-11 07:08:00 to 28-AUG-11 07:08:00 (CST-6)
Location: AVON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BON HOMME, SOUTH DAKOTA
From 28-AUG-11 07:25:00 to 28-AUG-11 07:25:00 (CST-6)
Location: KINGSBURG
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in HANSON, SOUTH DAKOTA
From 28-AUG-11 07:15:00 to 28-AUG-11 07:15:00 (CST-6)
Location: EPIPHANY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds caused tree damage, including several limbs blown down.

Hail in HUTCHINSON, SOUTH DAKOTA
From 28-AUG-11 07:15:00 to 28-AUG-11 07:15:00 (CST-6)
Location: MENNO ARPT
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Large hail caused crop damage. The amount of crop damage was not known.

Hail in HUTCHINSON, SOUTH DAKOTA
From 28-AUG-11 07:45:00 to 28-AUG-11 07:45:00 (CST-6)
Location: MILLTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in YANKTON, SOUTH DAKOTA
From 28-AUG-11 08:59:00 to 28-AUG-11 08:59:00 (CST-6)
Location: GAYVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MCCOOK, SOUTH DAKOTA
From 28-AUG-11 05:52:00 to 28-AUG-11 06:00:00 (CST-6)
Location: BRIDGEWATER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BEADLE, SOUTH DAKOTA
From 28-AUG-11 06:27:00 to 28-AUG-11 06:27:00 (CST-6)
Location: (HON)HURON ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage.