Strong Wind — Coastal North Bay Including Point Reyes National Seashore, California

2021-11-09 · Coastal North Bay Including Point Reyes National Seashore, California

Event narrative

Road closed due to downed powerlines and trees from gusty winds.

Wider weather episode

A weak to moderate atmospheric river event impacted the SF Bay Area November 8th and November 9th, bringing moderate to locally heavy rain and gusty winds. A low pressure system from the Gulf of Alaska deepened over the NE Pacific and made landfall in the OR/WA area November 8th. This system tapped into subtropical moisture from the Pacific Ocean and dropped substantial rainfall over the North Bay and into the immediate Bay Area, with accumulations up to 4 inches in coastal North Bay. A strong low-level jet also developed off the coast, bringing gusty winds in excess of 30-40 mph to the Bay Area. Several reports of roadway flooding were received, along with some downed powerlines and trees. Monterey OEM also reported a mudflow on the River Fire burn scar, which forced a road closure.

Source: NOAA Storm Events Database, event_id 992223. Narrative written by the NWS forecast office that issued the report.