Coastal Flood — Northern Humboldt Coast, California

2025-11-05 · Northern Humboldt Coast, California

Event narrative

The North Spit Tide Guage reached 9.43 ft MLLW at the morning high tide. An NWS survey was conducted of coastal flooding around the bay. Flooding was observed on streets in King Salmon with roads closed, flooding of the boat launch in Fields Landing, flooding of the waterfront behind Target in Eureka, flooding of business loading docks in Eureka, and water nearly onto Highway 255 at the Mad River Slough between Arcata and Manila.

Wider weather episode

A strong atmospheric river brought heavy rain to all of Northwest California but particularly targeted in the northern half of the forecast area in Humboldt, Del Norte, and Trinity counties. Additionally, a strong coastal jet developed ahead of the front, allowing for damaging winds to impact the higher terrain of Humboldt and Del Norte and strong winds to other valley locations. Strong winds were also recorded in Mendocino, Lake, and southern Trinity counties.

Source: NOAA Storm Events Database, event_id 1294009. Narrative written by the NWS forecast office that issued the report.