Heavy Snow — Southern Trinity, California

2021-12-24 to 2021-12-25 · Southern Trinity, California

Event narrative

Spotter report of 9 inches of snow that fell during a 15-hour duration at an elevation around 3,000 feet.

Wider weather episode

Long-wave trough settles over the area. A stronger mid to upper-level shortwave trough drove snow levels down to around 1,500 feet over portions of the area. Cold and unstable, post-frontal atmosphere brought isolated thunderstorms and small hail showers to Northwest California.

Source: NOAA Storm Events Database, event_id 998631. Narrative written by the NWS forecast office that issued the report.