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EF1 tornado in Stanislaus County, California

Tornado November 15, 2015 · Stanislaus County, California

EF1
Rating
3.0 mi
Path length
150 yd
Path width
$1.0M
Damage as recorded
$200K
Crop damage
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 150 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

A severe thunderstorm produced a tornado with multiple touch downs that moved through the north section of Denair, CA touching down around 1:54 pm PST and ending around 2:15 pm PST on Sunday, November 15, 2015. There were no injuries. About 21 homes were impacted, 2 of them with major damage, but most with minor roof damage. Many fences were knocked down. Numerous trees and tree branches were brought down, including several large trees and numerous sections of trees in walnut groves. Power lines were knocked down causing local power outages. The multiple touch down path was about 3 miles long. The damage path was about 175-200 yards at the widest point.

The wider storm

A Pacific front moved through interior Northern California bringing rain and mountain snow. Increased shear and instability developed in the afternoon that producing severe storms with large hail and an EF1 tornado.

Began near Denair (37.5306, -120.8118).

Source: NOAA Storm Events Database, event 605791. Narratives are written by the National Weather Service forecast office that issued the report.

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