Thunderstorms produced damaging winds in much of northwest Iowa, excluding the far northwestern corner of the state, during the early evening of August 8th.

Thunderstorm Wind in BUENA VISTA, IOWA
From 08-AUG-10 19:20:00 to 08-AUG-10 19:20:00 (CST-6)
Location: HANOVER
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused widespread tree damage, including numerous large branches blown down. The winds also bent a flag pole.

Thunderstorm Wind in BUENA VISTA, IOWA
From 08-AUG-10 19:25:00 to 08-AUG-10 19:25:00 (CST-6)
Location: STORM LAKE
Magnitude: 65.00 EG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew the roof off a manufacturing plant, damaged docks and boats along the lake, caused widespread tree damage including numerous large trees blown down, blew down power lines and poles, resulting in power outages, damaged or destroyed several small sheds, blew down several awnings on businesses, snapped a 4 inch by 4 inch street sign pole, and blew shingles off roofs. Numerous vehicles, homes, and businesses sustained minor damage directly from the wind, while other vehicles and homes were damaged by falling trees and tree debris, some heavily.

Thunderstorm Wind in CLAY, IOWA
From 08-AUG-10 19:40:00 to 08-AUG-10 19:40:00 (CST-6)
Location: SPENCER
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in CLAY, IOWA
From 08-AUG-10 19:40:00 to 08-AUG-10 19:40:00 (CST-6)
Location: WEBB
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

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

Thunderstorm Wind in WOODBURY, IOWA
From 08-AUG-10 18:09:00 to 08-AUG-10 18:09:00 (CST-6)
Location: SALIX
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 WOODBURY, IOWA
From 08-AUG-10 18:15:00 to 08-AUG-10 18:15:00 (CST-6)
Location: MOVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in WOODBURY, IOWA
From 08-AUG-10 18:22:00 to 08-AUG-10 18:22:00 (CST-6)
Location: SIOUX CITY
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in IDA, IOWA
From 08-AUG-10 18:47:00 to 08-AUG-10 18:47:00 (CST-6)
Location: GALVA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew the roof off a barn, blew down power lines, and caused tree damage.

Thunderstorm Wind in IDA, IOWA
From 08-AUG-10 18:50:00 to 08-AUG-10 18:50:00 (CST-6)
Location: IDA GROVE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

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

Thunderstorm Wind in WOODBURY, IOWA
From 08-AUG-10 18:00:00 to 08-AUG-10 18:00:00 (CST-6)
Location: SPRINGDALE
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds caused widespread tree damage, including several large trees and numerous branches blown down. Some of the tree debris blocked roads and caused minor damage to homes. The winds also blew down power lines, causing a power outage, and blew part of a freight train off its tracks.

Thunderstorm Wind in IDA, IOWA
From 08-AUG-10 18:40:00 to 08-AUG-10 18:40:00 (CST-6)
Location: HOLSTEIN
Magnitude: 65.00 EG
Property damage: 100.00K
Reported by: COOP Observer

Thunderstorm winds destroyed a machine shed, heavily damaged a large shed at a manufacturing plant, overturned a livestock trailer and a large grain wagon, destroyed a small garage, destroyed or damaged several small sheds, and caused tree damage, including several large trees blown down. A house was damaged by debris from the destroyed machine shed, while other buildings and vehicles sustained damage from falling trees and tree debris. The winds also caused an unknown amount of damage to corn crops.

Thunderstorm Wind in BUENA VISTA, IOWA
From 08-AUG-10 19:20:00 to 08-AUG-10 19:20:00 (CST-6)
Location: STORM LAKE ARPT
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds blew over a large semi truck, blocking the road and causing minor injuries to the driver.