Flash Flood — Calaveras, California

2023-03-12 · near Copperopolis, Calaveras, California

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (37.9354, -120.6239)

Source: NOAA Storm Events Database, event_id 1090540. Narrative written by the NWS forecast office that issued the report.