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Thunderstorm Wind in Grand County, Colorado

Thunderstorm Wind June 30, 2011 · Grand County, Colorado

83 mph
Estimated gust (72 kt)
$200K
Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Intense straightline winds from a severe thunderstorm knocked a 50-foot tree on to a roof. Fences were also toppled and shingles removed. Several loose objects were lifted and tossed.

The wider storm

Severe thunderstorms produced intense straight-line winds in Granby, causing extensive damage. Town officials in Granby estimated at least 30 trees were knocked down from the storm, just within the city limits. At least two roofs were separated from the buildings themselves. The damage to the high school alone was estimated to be at least $200,000. Debris from the wind blew out vehicle windows. Power was knocked out temporarily in several areas throughout Grand County. A hiker near Grand Lake was injured when a falling tree hit struck her and injured her ankle. Very strong thunderstorm winds were also observed across portions of the Urban Corridor and Northeast Plains of Colorado. An intense microburst wind destroyed a ferris wheel in Merino and caused one minor injury. A lightning strike destroyed a home in north Denver.

Began near Granby (40.0900, -105.9400).

Source: NOAA Storm Events Database, event 317628. Narratives are written by the National Weather Service forecast office that issued the report.

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