Persistent thunderstorms developed in the late morning over southeast South Dakota and continued through the afternoon and evening. All of the storms through early afternoon produced large hail, with one report of damaging wind gusts. Large hail, heavy rain and flash flooding were noted during the evening. Some of the flash flooding continued through the night and next day as flooding.

Hail in TURNER, SOUTH DAKOTA
From 22-SEP-10 13:08:00 to 22-SEP-10 13:12:00 (CST-6)
Location: HURLEY
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball size hail dented several vehicles. The amount of damage was not known.

Hail in MCCOOK, SOUTH DAKOTA
From 22-SEP-10 13:18:00 to 22-SEP-10 13:18:00 (CST-6)
Location: SPENCER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TURNER, SOUTH DAKOTA
From 22-SEP-10 13:29:00 to 22-SEP-10 13:29:00 (CST-6)
Location: PARKER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large hail covered the ground.

Hail in LINCOLN, SOUTH DAKOTA
From 22-SEP-10 13:30:00 to 22-SEP-10 13:30:00 (CST-6)
Location: WORTHING
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was accompanied by estimated 60 mph wind gusts.

Thunderstorm Wind in LINCOLN, SOUTH DAKOTA
From 22-SEP-10 13:30:00 to 22-SEP-10 13:30:00 (CST-6)
Location: WORTHING
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds, accompanied by hail, caused minor tree damage.

Hail in LINCOLN, SOUTH DAKOTA
From 22-SEP-10 13:35:00 to 22-SEP-10 13:35:00 (CST-6)
Location: LENNOX SKIE ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TURNER, SOUTH DAKOTA
From 22-SEP-10 13:38:00 to 22-SEP-10 13:38:00 (CST-6)
Location: CHANCELLOR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINCOLN, SOUTH DAKOTA
From 22-SEP-10 13:44:00 to 22-SEP-10 13:44:00 (CST-6)
Location: CANTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINCOLN, SOUTH DAKOTA
From 22-SEP-10 13:50:00 to 22-SEP-10 13:50:00 (CST-6)
Location: CANTON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MOODY, SOUTH DAKOTA
From 22-SEP-10 17:26:00 to 22-SEP-10 17:26:00 (CST-6)
Location: LONE TREE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in BROOKINGS, SOUTH DAKOTA
From 22-SEP-10 18:37:00 to 23-SEP-10 00:30:00 (CST-6)
Location: MEDARY
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rainfall of several inches caused flash flooding of numerous streets, basements, fields, and other low areas in and near Brookings. Widespread flash flooding from the overflow of Six Mile Creek was noted in the western and northwestern parts of the city. People in at least 50 houses, mobile homes, and apartments were forced to evacuate, and there was widespread water damage to structures, contents, and vehicles in this area. The widespread flooding from the creek came close to but did not reach the downtown area, although street flooding there was noted.

Flood in BROOKINGS, SOUTH DAKOTA
From 23-SEP-10 00:30:00 to 23-SEP-10 18:30:00 (CST-6)
Location: (BKX)BROOKINGS MUNI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Evening flash flooding of Six Mile creek continued through the night and following day as a flood. The water continued to flood houses, mobile homes and numerous roads.

Flash Flood in LAKE, SOUTH DAKOTA
From 22-SEP-10 19:55:00 to 23-SEP-10 00:39:00 (CST-6)
Location: ORLAND
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall of several inches caused widespread flash flooding of streets, fields, parks, basements, and other low areas in Madison, with flooding of roads and fields also reported outside of the town. Park Creek, which runs through Madison, was affected and contributed to the flooding, and the rock walls of the creek bed in town were damaged. Some of the flooded roads were also damaged.

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:00:00 to 22-SEP-10 10:00:00 (CST-6)
Location: MECKLING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail was accompanied by estimated 40 mph wind gusts.

Hail in YANKTON, SOUTH DAKOTA
From 22-SEP-10 10:14:00 to 22-SEP-10 10:14:00 (CST-6)
Location: MISSION HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large hails covered the ground.

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:15:00 to 22-SEP-10 10:15:00 (CST-6)
Location: MECKLING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood in LAKE, SOUTH DAKOTA
From 23-SEP-10 00:39:00 to 23-SEP-10 18:30:00 (CST-6)
Location: ORLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Flash flooding which began during the evening continued through the night and next day as a flood. Numerous roads remained flooded, with water only slowly subsiding. Water was also slow to drain from flooded parks and fields.

Flash Flood in CHARLES MIX, SOUTH DAKOTA
From 22-SEP-10 22:45:00 to 23-SEP-10 03:00:00 (CST-6)
Location: DANTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain caused flash flooding and closing of several roads.

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:23:00 to 22-SEP-10 10:23:00 (CST-6)
Location: MECKLING
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:25:00 to 22-SEP-10 10:25:00 (CST-6)
Location: VERMILLION
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BRULE, SOUTH DAKOTA
From 22-SEP-10 10:40:00 to 22-SEP-10 10:40:00 (CST-6)
Location: BIJOU HILLS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large hail was accompanied by rainfall of 1.80 inches.

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:29:00 to 22-SEP-10 10:40:00 (CST-6)
Location: VERMILLION
Magnitude: 3.00 
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large hail damaged numerous vehicles with dent and cracked and broken windshields. Twelve skylights at a local Wal-Mart store were broken. Some damage to roofs and siding was also sustained.

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:50:00 to 22-SEP-10 10:50:00 (CST-6)
Location: DALESBURG
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Large hail caused an unknown amount of damage to vehicles.

Hail in BRULE, SOUTH DAKOTA
From 22-SEP-10 10:50:00 to 22-SEP-10 10:50:00 (CST-6)
Location: EAGLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in UNION, SOUTH DAKOTA
From 22-SEP-10 11:00:00 to 22-SEP-10 11:00:00 (CST-6)
Location: ALCESTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BON HOMME, SOUTH DAKOTA
From 22-SEP-10 11:05:00 to 22-SEP-10 11:05:00 (CST-6)
Location: PERKINS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINCOLN, SOUTH DAKOTA
From 22-SEP-10 11:55:00 to 22-SEP-10 11:55:00 (CST-6)
Location: HUDSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 12:25:00 to 22-SEP-10 12:25:00 (CST-6)
Location: WAKONDA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HUTCHINSON, SOUTH DAKOTA
From 22-SEP-10 12:35:00 to 22-SEP-10 12:35:00 (CST-6)
Location: MENNO ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail was accompanied by heavy rain.

Hail in HANSON, SOUTH DAKOTA
From 22-SEP-10 12:42:00 to 22-SEP-10 12:42:00 (CST-6)
Location: FARMER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CLAY, SOUTH DAKOTA
From 22-SEP-10 10:28:00 to 22-SEP-10 10:28:00 (CST-6)
Location: VERMILLION
Magnitude: 2.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Large hail dented vehicles and cracked windshields. The amount of damage was not known.