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EF0 tornado in Wallowa County, Oregon

Tornado May 6, 2009 · Wallowa County, Oregon

EF0

Rating

0.2 mi

Path length

10 yd

Path width

$100K

Damage as recorded

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 10 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

Eyewitnesses saw the cover being ripped off the sewer ponds and rotating debris being blown into the air across the Wallowa Rover.

The wider storm

An upper level trough combined with an approaching cold front and daytime heating produced severe thunderstorms. A brief tornado was observed near Adams in Umatilla County also near Wallowa in Wallowa County.

Began near Wallowa (45.5780, -117.5350).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

EF1 Umatilla County

Source: NOAA Storm Events Database, event 162738. Narratives are written by the National Weather Service forecast office that issued the report.

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