Thunderstorms produced large hail, damaging winds, and brief tornadoes in southeast South Dakota during the evening of July 23rd. The storms moved east and affected the area mainly near and south of Interstate 90. However, the storms affected an area further north, including Brookings, when they arrived near the eastern border of South Dakota. Flash flooding resulted in the Brookings area.

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 23-JUL-10 20:55:00 to 23-JUL-10 20:55:00 (CST-6)
Location: (BKX)BROOKINGS MUNI
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 23-JUL-10 19:26:00 to 23-JUL-10 19:26:00 (CST-6)
Location: STICKNEY
Magnitude: 52.00 EG
Property damage: 0.00K
Reported by: Storm Chaser

Thunderstorm winds contributed to an unknown amount of crop damage. The winds were accompanied by large hail.

Hail in CHARLES MIX, SOUTH DAKOTA
From 23-JUL-10 19:30:00 to 23-JUL-10 19:30:00 (CST-6)
Location: PICKSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 23-JUL-10 21:03:00 to 23-JUL-10 21:03:00 (CST-6)
Location: EGAN
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew the roofs off several storage bins.

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 23-JUL-10 21:04:00 to 23-JUL-10 21:04:00 (CST-6)
Location: FLANDREAU
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.

Thunderstorm Wind in TURNER, SOUTH DAKOTA
From 23-JUL-10 21:10:00 to 23-JUL-10 21:10:00 (CST-6)
Location: IRENE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including a large tree split, and several branches blown down.

Flash Flood in BROOKINGS, SOUTH DAKOTA
From 23-JUL-10 21:15:00 to 23-JUL-10 22:15:00 (CST-6)
Location: BROOKINGS
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain caused flash flooding of several streets and caused water damage to a few businesses.

Hail in BRULE, SOUTH DAKOTA
From 23-JUL-10 18:04:00 to 23-JUL-10 18:04:00 (CST-6)
Location: (9V9)CHAMBERLAIN ARP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in BRULE, SOUTH DAKOTA
From 23-JUL-10 18:06:00 to 23-JUL-10 18:06:00 (CST-6)
Location: CHAMBERLAIN ARPT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Hail in BRULE, SOUTH DAKOTA
From 23-JUL-10 18:16:00 to 23-JUL-10 18:16:00 (CST-6)
Location: (9V9)CHAMBERLAIN ARP
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in GREGORY, SOUTH DAKOTA
From 23-JUL-10 18:44:00 to 23-JUL-10 18:44:00 (CST-6)
Location: LUCAS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado in BRULE, SOUTH DAKOTA
From 23-JUL-10 18:52:00 to 23-JUL-10 18:53:00 (CST-6)
Location: EAGLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A brief tornado caused no reported damage.

Tornado in GREGORY, SOUTH DAKOTA
From 23-JUL-10 18:58:00 to 23-JUL-10 18:59:00 (CST-6)
Location: HERRICK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A brief tornado caused no reported damage.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 23-JUL-10 19:45:00 to 23-JUL-10 19:45:00 (CST-6)
Location: MITCHELL
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds caused tree and power line damage, including several trees blown down. A house was damaged by a tree falling onto its roof.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 23-JUL-10 19:45:00 to 23-JUL-10 19:45:00 (CST-6)
Location: ETHAN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 23-JUL-10 19:48:00 to 23-JUL-10 19:48:00 (CST-6)
Location: MITCHELL
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused damage to trees and power lines.

Thunderstorm Wind in HANSON, SOUTH DAKOTA
From 23-JUL-10 19:55:00 to 23-JUL-10 19:55:00 (CST-6)
Location: FULTON
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.

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 23-JUL-10 20:10:00 to 23-JUL-10 20:10:00 (CST-6)
Location: SPENCER
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew over billboards and caused tree damage.

Hail in AURORA, SOUTH DAKOTA
From 23-JUL-10 19:23:00 to 23-JUL-10 19:23:00 (CST-6)
Location: PLANKINTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in DOUGLAS, SOUTH DAKOTA
From 23-JUL-10 19:25:00 to 23-JUL-10 19:25:00 (CST-6)
Location: CORSICA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down and flattened one grain bin and damaged several others. The winds also caused tree damage, including several trees blown down.

Hail in AURORA, SOUTH DAKOTA
From 23-JUL-10 19:26:00 to 23-JUL-10 19:26:00 (CST-6)
Location: STICKNEY
Magnitude: 1.75 
Property damage: 0.00K
Reported by: Trained Spotter

Large hail caused an unknown amount of crop damage. The hail was accompanied by damaging winds.

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 23-JUL-10 20:20:00 to 23-JUL-10 20:20:00 (CST-6)
Location: SALEM
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 23-JUL-10 20:27:00 to 23-JUL-10 20:27:00 (CST-6)
Location: RAMONA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

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

Hail in KINGSBURY, SOUTH DAKOTA
From 23-JUL-10 20:30:00 to 23-JUL-10 20:30:00 (CST-6)
Location: ARLINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 23-JUL-10 20:33:00 to 23-JUL-10 20:33:00 (CST-6)
Location: JUNIUS
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 BON HOMME, SOUTH DAKOTA
From 23-JUL-10 20:39:00 to 23-JUL-10 20:39:00 (CST-6)
Location: TYNDALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 23-JUL-10 20:46:00 to 23-JUL-10 20:46:00 (CST-6)
Location: WENTWORTH
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused tree damage, including a large tree blown down.

Thunderstorm Wind in CHARLES MIX, SOUTH DAKOTA
From 23-JUL-10 18:53:00 to 23-JUL-10 18:53:00 (CST-6)
Location: PLATTE MUNI ARPT
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. The winds were accompanied by heavy rain and small hail.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 23-JUL-10 19:45:00 to 23-JUL-10 19:45:00 (CST-6)
Location: MITCHELL
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew the roof off a garage. The winds also caused tree damage, including large branches blown down.

Tornado in GREGORY, SOUTH DAKOTA
From 23-JUL-10 18:55:00 to 23-JUL-10 18:56:00 (CST-6)
Location: BONESTEEL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief rope like tornado caused no reported damage.

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 23-JUL-10 20:55:00 to 23-JUL-10 21:00:00 (CST-6)
Location: BROOKINGS
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down power lines and caused tree damage, including several trees blown down. The winds also partially peeled off the roof of a commercial storage building.

Thunderstorm Wind in LINCOLN, SOUTH DAKOTA
From 23-JUL-10 20:50:00 to 23-JUL-10 20:50:00 (CST-6)
Location: TEA
Magnitude: 61.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Other Federal Agency

Thunderstorm winds destroyed 70 feet of scaffolding at a Lewis and Clark regional water project.

Thunderstorm Wind in MINER, SOUTH DAKOTA
From 23-JUL-10 20:07:00 to 23-JUL-10 20:07:00 (CST-6)
Location: HOWARD MUNI ARPT
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds moved a house off its foundation.

Thunderstorm Wind in DOUGLAS, SOUTH DAKOTA
From 23-JUL-10 19:15:00 to 23-JUL-10 19:15:00 (CST-6)
Location: HARRISON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds caused tree damage, including large trees blown down. One healthy maple tree was uprooted.