Heavy Rain — Mendocino, California

2025-12-21 · near Old Hopland, Mendocino, California

Event narrative

Rocks and boulders the size of basketballs in the roadway on the Hopland Grade along Highway 175.

Wider weather episode

Beginning mid-December, a series of storm systems impacted Northwest California with the first set of storms bringing particularly heavy rain from December 19th through December 21st. The heaviest rain occurred in Humboldt County, but impacts were felt across the Northwest California region. Both small stream and main stem river flooding occurred during the event with the Mad and Eel Rivers exceeding moderate flood stage.

View location on OpenStreetMap → (38.9700, -123.0200)

Source: NOAA Storm Events Database, event_id 1300778. Narrative written by the NWS forecast office that issued the report.