Flood — San Mateo, California

2025-11-17 · near San Bruno, San Mateo, California

Event narrative

Flooding was reported on southbound US Highway 101 north of Millbrae.

Wider weather episode

A low pressure system brought rain and winds to the Bay Area and Central Coast on November 16 and 17th. Special Marine Warnings and Special Weather Statements were issued due to isolated thunderstorms causing localized heavy rain and gusty winds. The main frontal rain band came through in the overnight hours, with isolated to scattered showers and some thunderstorms continuing into the 17th.

View location on OpenStreetMap → (37.6303, -122.4029)

Source: NOAA Storm Events Database, event_id 1299254. Narrative written by the NWS forecast office that issued the report.