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EF1 tornado in Linn County, Oregon

Tornado September 19, 2017 · Linn County, Oregon

EF1

Rating

0.7 mi

Path length

167 yd

Path width

$240K

Damage as recorded

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The path drawn at its surveyed width of 167 yards (0.09 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

Tornado touched down along Green Mountain Road. Although tornado appeared to not be on the ground the entire path, the damage path appears to be 0.69 mile long. The tornado damaged five open barns, damaged 5 to 10 plus additional sheds or barns, brought down two power poles, and snapped six trees 4-12 inches in diameter. There were no injuries.

The wider storm

Warm surface temperatures with a strong upper-level front bringing cold air in aloft generated enough instability for a few strong thunderstorms across the region September 19th. One of these storms produced a brief tornado.

Began near Lacomb (44.5918, -122.7041).

Source: NOAA Storm Events Database, event 722061. Narratives are written by the National Weather Service forecast office that issued the report.

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