Heavy Rain in Trinity County, California

Heavy Rain January 4, 2025 · Trinity County, California

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

What the National Weather Service wrote

A section of Pelletreau Ridge Road and Wintoon

Flat Road washed out and closed, 2 miles southwest of Hyampom, CA.

Lat. 40.59N, Long. -123.48W.

The wider storm

A warm front will bring an initial push of precipitation and light snow at higher elevations. A cutoff low will follow, with a converging moisture flux which brought broader precipitation to areas of Del Norte and Humboldt in the following days. A colder air mass approaches in succession of the previously mentioned, bringing 500mb temperature of -27 to -29 Celsius, increasing instability over the weekend.

Began near Hyampom (40.5900, -123.4800).

Source: NOAA Storm Events Database, event 1235997. Narratives are written by the National Weather Service forecast office that issued the report.

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