High Wind — Napa County, California

2017-12-20 · Napa County, California

Event narrative

Strong winds surfaced below the San Gorgonio Pass with areas of blowing dust. The Whitewater mesonet station reported wind gusts over 70 mph for 3 hours.

Wider weather episode

A moderate strength upper level trough slid through the Great Basin, with upper level support that set up in a favorable position for mountain wave activity on the west slopes of the Southern California mountains on the 20th. An amazing 110 mph wind gust occurred in Burns Canyon with a surfacing mountain wave. Major dust issues were reported in the Mojave Desert.

Source: NOAA Storm Events Database, event_id 731514. Narrative written by the NWS forecast office that issued the report.