Flood in Contra Costa County, California

Flood January 16, 2020 · Contra Costa County, California

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

What the National Weather Service wrote

Roadway flooding at I-680 S and Crow Canyon Rd off ramp. Vehicles hydroplaning.

The wider storm

A potent cold front swept through the region on January 16th bringing widespread rain, gusty winds, low elevation snow, and thunderstorms. This system brought widespread roadway flooding, downed trees, small hail, and snow as low as 2400 ft in elevation. Numerous flights were delayed or canceled at SFO due to the weather.

Began near San Ramon (37.7768, -121.9765).

Source: NOAA Storm Events Database, event 867513. Narratives are written by the National Weather Service forecast office that issued the report.

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