Thunderstorms produced damaging winds at several locations along a long path from Gregory to Brookings Counties in southeast South Dakota during the evening of August 19th. There was also one report of marginally large hail.

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 19-AUG-10 20:42:00 to 19-AUG-10 20:42:00 (CST-6)
Location: RAMONA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused tree damage, including several trees snapped off.

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 19-AUG-10 21:31:00 to 19-AUG-10 21:31:00 (CST-6)
Location: BROOKINGS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds caused widespread tree damage, including some trees over 3 feet in diameter blown down.

Thunderstorm Wind in CHARLES MIX, SOUTH DAKOTA
From 19-AUG-10 19:15:00 to 19-AUG-10 19:15:00 (CST-6)
Location: WAGNER
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down power poles and lines.

Thunderstorm Wind in CHARLES MIX, SOUTH DAKOTA
From 19-AUG-10 19:15:00 to 19-AUG-10 19:15:00 (CST-6)
Location: LAKE ANDES
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including branches blown down.

Thunderstorm Wind in DOUGLAS, SOUTH DAKOTA
From 19-AUG-10 19:27:00 to 19-AUG-10 19:27:00 (CST-6)
Location: CORSICA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down branches from several trees.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 19-AUG-10 19:50:00 to 19-AUG-10 19:50:00 (CST-6)
Location: MT VERNON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Thunderstorm winds caused scattered tree damage. The winds were accompanied by very heavy rain.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 19-AUG-10 19:59:00 to 19-AUG-10 19:59:00 (CST-6)
Location: MITCHELL
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in HANSON, SOUTH DAKOTA
From 19-AUG-10 20:03:00 to 19-AUG-10 20:03:00 (CST-6)
Location: ROCKPORT
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew the roof off a hog barn.

Thunderstorm Wind in HUTCHINSON, SOUTH DAKOTA
From 19-AUG-10 20:20:00 to 19-AUG-10 20:20:00 (CST-6)
Location: MENNO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 19-AUG-10 21:31:00 to 19-AUG-10 21:31:00 (CST-6)
Location: (BKX)BROOKINGS MUNI
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in BROOKINGS, SOUTH DAKOTA
From 19-AUG-10 21:35:00 to 19-AUG-10 21:35:00 (CST-6)
Location: BROOKINGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in GREGORY, SOUTH DAKOTA
From 19-AUG-10 19:10:00 to 19-AUG-10 19:10:00 (CST-6)
Location: FAIRFAX
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including branches blown down.

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 19-AUG-10 21:18:00 to 19-AUG-10 21:18:00 (CST-6)
Location: SIOUX FALLS
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS