Debris Flow — Napa, California

2018-11-29 · near Woodleaf, Napa, California

Event narrative

Rockslide entire sb lane.

Wider weather episode

A mid/upper level low moved through the region at the end of November. A cool unstable air mass allowed for the development of scattered thunderstorms across the region that produced lightning and small hail. An associated surface low approached the coast during this time causing high surf and gusty winds. Some locations saw wave heights above 25 feet. This system caused roadway flooding, minor debris flows, and downed trees along with damage from gusty winds.

View location on OpenStreetMap → (38.6399, -122.5923)

Source: NOAA Storm Events Database, event_id 788893. Narrative written by the NWS forecast office that issued the report.