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EF0 tornado in Owyhee County, Idaho

Tornado June 21, 2009 · Owyhee County, Idaho

EF0

Rating

0.1 mi

Path length

20 yd

Path width

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The path drawn at its surveyed width of 20 yards (0.01 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 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

A weak tornado was observed by law enforcement as it moved east northeast across State Highway 51, 4 miles north of the Nevada border. Dust and sage brush were picked up by the tornado and was on the ground for about 1 minute.

The wider storm

An upper low swinging out of the lee side of the Cascades moved into Southwest Idaho spawning a tornado and strong thunderstorms that resulted in localized flash flooding.

Began near Riddle (42.0100, -116.1400).

Source: NOAA Storm Events Database, event 179797. Narratives are written by the National Weather Service forecast office that issued the report.

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