Thunderstorms produced large hail and damaging winds across part of southeast South Dakota near and north of Interstate 90 during the afternoon of July 1st. Most of the damage from the severe weather and flash flooding was in Lake, Brookings, and Moody Counties.

Hail in JERAULD, SOUTH DAKOTA
From 01-JUL-11 12:08:00 to 01-JUL-11 12:08:00 (CST-6)
Location: WESSINGTON SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MINER, SOUTH DAKOTA
From 01-JUL-11 13:15:00 to 01-JUL-11 13:15:00 (CST-6)
Location: CANOVA
Magnitude: 2.50 
Reported by: Public

Large hail damaged siding and shingles, cracked windows, and dented vehicles. The hail also caused crop damage. The amount of property and crop damage was not known.

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 01-JUL-11 13:28:00 to 01-JUL-11 13:28:00 (CST-6)
Location: STANLEY CORNER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Hail in MCCOOK, SOUTH DAKOTA
From 01-JUL-11 13:45:00 to 01-JUL-11 13:45:00 (CST-6)
Location: CANISTOTA
Magnitude: 1.75 
Property damage: 25.00K
Reported by: Trained Spotter

Large hail stripped leaves off trees, dented vehicles, and caused an unknown amount of crop damage.

Hail in MCCOOK, SOUTH DAKOTA
From 01-JUL-11 13:57:00 to 01-JUL-11 13:57:00 (CST-6)
Location: MONTROSE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large hail dented vehicles and caused crop damage. The amount of property and crop damage was not known.

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 01-JUL-11 14:00:00 to 01-JUL-11 14:00:00 (CST-6)
Location: MADISON MUNI ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 01-JUL-11 14:07:00 to 01-JUL-11 14:07:00 (CST-6)
Location: WENTWORTH
Magnitude: 61.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused widespread tree damage, including several trees uprooted or flattened, and others snapped a few feet above the ground. The winds also destroyed a 60 foot by 90 foot shed. Several homes and vehicles were damaged, including a car crushed by a tree and a garage heavily damaged by a falling tree. The winds caused damage to power lines and poles, both directly and from wind blown debris, with a resulting power outage in most of Wentworth.

Hail in LAKE, SOUTH DAKOTA
From 01-JUL-11 14:12:00 to 01-JUL-11 14:12:00 (CST-6)
Location: NUNDA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large hail dented a few vehicles and caused crop damage. The amount of property and crop damage was not known.

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 01-JUL-11 14:15:00 to 01-JUL-11 14:15:00 (CST-6)
Location: NUNDA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage.

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 01-JUL-11 14:25:00 to 01-JUL-11 14:25:00 (CST-6)
Location: SIOUX FALLS JCT
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew over 4 semi-trailer trucks and a camper at the Flandreau exit of Interstate 29.

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 01-JUL-11 14:25:00 to 01-JUL-11 14:25:00 (CST-6)
Location: COLMAN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Flash Flood in BROOKINGS, SOUTH DAKOTA
From 01-JUL-11 14:40:00 to 01-JUL-11 16:15:00 (CST-6)
Location: STORLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain caused flash flooding of several streets in and near Brookings. Several vehicles stalled on the flooded roads, and a few were floated.

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 01-JUL-11 14:42:00 to 01-JUL-11 14:47:00 (CST-6)
Location: ELKTON
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused widespread tree damage, including numerous trees blown down. Several houses and garages were damaged by tree debris, and the winds blew shingles off roofs. The winds damaged siding and roofs. Power lines and poles were blown down, resulting in a power outage. Several streets in Elkton were blocked by trees.

Hail in BROOKINGS, SOUTH DAKOTA
From 01-JUL-11 14:42:00 to 01-JUL-11 14:42:00 (CST-6)
Location: ELKTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 01-JUL-11 14:47:00 to 01-JUL-11 14:47:00 (CST-6)
Location: ELKTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 01-JUL-11 14:15:00 to 01-JUL-11 14:15:00 (CST-6)
Location: EGAN
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm winds flattened a Morton building.

Flash Flood in LAKE, SOUTH DAKOTA
From 01-JUL-11 14:00:00 to 01-JUL-11 15:30:00 (CST-6)
Location: MADISON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy rain of around 2 1/2 inches in less than a half hour caused flooding of streets in Madison and of roads and fields in rural areas, including South Dakota Highway 34 a little west of Junius. Damage to soybean crops from the flooding and accompanying hail was reported on the west side of Lake Herman, and additional crop damage was suspected from the flooding. The heavy rain fell on ground which was already saturated.

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 01-JUL-11 14:30:00 to 01-JUL-11 14:30:00 (CST-6)
Location: FLANDREAU
Magnitude: 61.00 EG
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused widespread tree damage in Flandreau, including numerous trees uprooted or snapped. Several homes and vehicles were damaged, mostly by falling trees or tree debris. A large camper in the city park was overturned. The winds and tree debris also damaged power lines, causing a power outage. Tree debris blocked numerous roads in and near town. Damage to the city's electrical system alone was later estimated at $125,000.

Hail in LAKE, SOUTH DAKOTA
From 01-JUL-11 13:55:00 to 01-JUL-11 13:55:00 (CST-6)
Location: MADISON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Hail in LAKE, SOUTH DAKOTA
From 01-JUL-11 13:45:00 to 01-JUL-11 13:45:00 (CST-6)
Location: MADISON
Magnitude: 1.00 
Property damage: 0.00K
Reported by: Newspaper

Large hail, in combination with heavy rain, caused damage to soybean crops.