Flood — San Mateo, California

2025-11-17 · near (sql)san Carlos Arpt, San Mateo, California

Event narrative

Flooding was reported in the number 1, 2, and 3 lanes of southbound US Highway 101 at Holly Street, and in the number 1 and 2 lanes of northbound US Highway 101 between California Highway 92 and Ralston Street.

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 → (37.5139, -122.2565)

Source: NOAA Storm Events Database, event_id 1299249. Narrative written by the NWS forecast office that issued the report.