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EF0 tornado in Grant County, Oregon

Tornado November 5, 2023 · Grant County, Oregon

EF0

Rating

0.2 mi

Path length

75 yd

Path width

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The path drawn at its surveyed width of 75 yards (0.04 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

Approximate EF0 tornado path was less than 0.25 miles at Marysville Lane, located east-southeast of Canyon City, Oregon. One tree was uprooted in saturated soil. One manufactured home experienced roof damage, including the removal of roofing

material. An opened hay shelter also saw roofing material removed. A travel-trailer was moved several feet from its original location.

The wider storm

An upper level low pressure system offshore the Pacific Northwest produced showers across the eastern mountains throughout the day on November 5th. forecast soundings over this area indicated meager MUCAPE and decent mid-level lapse rates over the eastern mountains of Oregon in the afternoon. This provided enough support for thunderstorm development and a subsequent occurrence of a weak tornado near Canyon City, Or.

Began near Canyon City (44.3983, -118.9123).

Source: NOAA Storm Events Database, event 1149886. Narratives are written by the National Weather Service forecast office that issued the report.

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