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EF0 tornado in Butte County, California

Tornado November 18, 2020 · Butte County, California

EF0
Rating
0.5 mi
Path length
3 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 3 yards (0.00 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 tornado was reported by multiple public sources. A chain link fence was knocked over and a few tree branches fell. No other damage has been reported. Tornado width and path is estimated.

The wider storm

Low pressure formed off the coast of California and tapped into tropical moisture which lead to widespread Valley rain, mountain snow, and eventually even thunderstorm development over interior northern California. Valley rain amounts generally ranged from 0.25 to 1.0 inch of rain while foothill locations received 1.0 to 4.0 inches of rain. High elevation mountain snow was bountiful too with most sites reporting 1 to 2 feet of snow. The next day, behind the main front, widespread showers and thunderstorms developed on Nov 19.

Began near Bloomer (39.6500, -121.5600).

Other tornadoes from the same storm system

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

EF0 El Dorado County

Source: NOAA Storm Events Database, event 930947. Narratives are written by the National Weather Service forecast office that issued the report.

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