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EF1 tornado in Park County, Colorado

Tornado August 18, 2009 · Park County, Colorado

EF1
Rating
9.3 mi
Path length
100 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 100 yards (0.06 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

North of Eleven Mile State Park, the tornado destroyed to small sheds and a camper, while a steel framed barn suffered major damage. Two homes received minor damage including: broken windows, cracked siding, lost shingles and a collapsed deck awning. At another property northeast of Lake George, another camper was flipped and destroyed. Minor damage was also observed with signs knocked down along State Highway 24. Between Eleven Mile Reservoir and Lake George, there were numerous areas of significant tree damage. Large ponderosa pines, two feet in diameter, were uprooted and snapped off.

The wider storm

A tornado touched down in Park County near Lake George. In spite of its nearly 10-mi. storm track, the damage associated with the tornado was relatively minor.

Began near Lake George (38.9625, -105.5209).

Source: NOAA Storm Events Database, event 192562. Narratives are written by the National Weather Service forecast office that issued the report.

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