Flash Flood in Calaveras County, California

Flash Flood March 12, 2023 · Calaveras County, California

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Calaveras County Public Works reported the closure of Cooper Cove Drive between Black Creek Drive and Cheyenne Road in Copperopolis due to severe road damage by flooding.

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 Copperopolis (37.9354, -120.6239).

Other tornadoes from the same storm system

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

EF1 Tuolumne County

Source: NOAA Storm Events Database, event 1090540. Narratives are written by the National Weather Service forecast office that issued the report.

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