Heavy Rain — Trinity, California

2025-01-04 · near Hyampom, Trinity, California

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (40.5900, -123.4800)

Source: NOAA Storm Events Database, event_id 1235997. Narrative written by the NWS forecast office that issued the report.