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- A destructive derecho event struck the states of Iowa, Illinois, Michigan, and Ohio on July 11, 2011 and was the most damaging portion of a much larger derecho event known as The Cross Country Derecho of July 2011. It started on the morning of July 11, 2011 when a powerful long-lasting straight-line windstorm, known as a derecho, developed over central Iowa and carved a path of extensive damage across east central Iowa. The storms first took shape as a cluster of low end severe storms over Southern Nebraska during the late afternoon of July 10. The system continued northeastward and entered western Iowa at 1:00 a.m, still only as a marginal line of severe storms. As the system passed through the Northern Des Moines metro area at 3:30 a.m., it interacted with an outflow boundary from the storms to the north and rapidly intensified as it accelerated eastward. Over the next hour and a half the storm plowed eastward through Story, Marshall, and Tama Counties, blasting the area with winds of up to 105 miles per hour (169 km/h). The storm continued to track eastward, plowing through eastern Iowa and the Southern Great Lakes region before dissipating in West Virginia in the mid-afternoon. Thousands of trees were downed in western Iowa alone, and numerous structures were either damaged or destroyed. The peak winds were estimated to be in the range of 130 miles per hour (210 km/h), equal to a Category 4 hurricane. One man was killed in Grand Rapids, Michigan due to a falling tree. Shortly after this complex, a major heat wave would affect the eastern half of the continent, with another significant derecho event occurring on July 17, 2011 over Ontario, Quebec and Northern New England. (en)
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- Radar loop of the July 2011 Midwest Derecho (en)
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- July 2011 Midwest Derecho (en)
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- A destructive derecho event struck the states of Iowa, Illinois, Michigan, and Ohio on July 11, 2011 and was the most damaging portion of a much larger derecho event known as The Cross Country Derecho of July 2011. It started on the morning of July 11, 2011 when a powerful long-lasting straight-line windstorm, known as a derecho, developed over central Iowa and carved a path of extensive damage across east central Iowa. The storms first took shape as a cluster of low end severe storms over Southern Nebraska during the late afternoon of July 10. The system continued northeastward and entered western Iowa at 1:00 a.m, still only as a marginal line of severe storms. As the system passed through the Northern Des Moines metro area at 3:30 a.m., it interacted with an outflow boundary from the st (en)
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- July 2011 Midwest Derecho (en)
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