Debris Flow in San Mateo County, California

Debris Flow January 5, 2023 · San Mateo County, California

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

What the National Weather Service wrote

A mud slide blocked the entire westbound lane of California Highway 92 west of Pilarcitos Creek Road near Half Moon Bay.

The wider storm

On January 4th to the 5th, a strong atmospheric river combined with a bomb cyclone led to widespread heavy rain, damaging wind gusts, and high surf across the Bay Area and Central Coast.

Began near North Fair Oaks (37.4923, -122.3866).

Source: NOAA Storm Events Database, event 1078490. Narratives are written by the National Weather Service forecast office that issued the report.

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