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EF0 tornado in Umatilla County, Oregon

Tornado June 27, 2023 · Umatilla County, Oregon

EF0

Rating

0.1 mi

Path length

10 yd

Path width

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

Social media reports including several photos showed a landspout had spun up in the farm fields east of Milton-Freewater, OR.

The wider storm

Support from an upper low over the Montana and Idaho border as well as increasing surface based instability lead to thunderstorm activity over the east slopes of the Cascades and the Blue Mountains. On the western side of the Blue Mountains just east of the foothills, surface winds, outflows from storms over the mountains, and the area terrain lead to the development of a landspout east of Milton-Freewater.

Began near State Line (45.9775, -118.2793).

Source: NOAA Storm Events Database, event 1113293. Narratives are written by the National Weather Service forecast office that issued the report.

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