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EF1 tornado in Tuolumne County, California

Tornado March 11, 2023 · Tuolumne County, California

EF1
Rating
0.8 mi
Path length
100 yd
Path width
$20K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

NOAA recorded where this tornado touched down but not where it lifted, so it appears as a point. 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

Numerous hardwood trees snapped or uprooted. A wooden power pole snapped in half. NWS Storm Survey determined it to be rated EF-1 with 90 mph winds.

The wider storm

A wet system brought periods of heavy rain with flooding. There was 1 to 2 feet of snow accumulated above 6,500 feet, locally higher on some peaks. Heavy rain fell bringing widespread roadway flooding, as well as local mudslides, flash flooding, with evacuations ordered in some areas. Thunderstorms with large hail, strong damaging winds and tornadoes were reported. Strong winds gusting to 55 to 75 mph brought down numerous trees and powerlines across the area, causing widespread and extended power outages.

Began near Chinese (37.9300, -120.5300).

Source: NOAA Storm Events Database, event 1090237. Narratives are written by the National Weather Service forecast office that issued the report.

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