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King Tides Flood Marin County Ahead of Saturday Peak and Storm Surge

A supermoon plus recent rain are driving rare tide heights that could worsen flooding Saturday.

Overview

  • The National Weather Service has a Coastal Flood Warning for San Francisco Bay through 2 p.m. Saturday with up to 2.5 feet of inundation in low-lying shoreline areas.
  • King tide levels are forecast to peak around 10:30 a.m. Saturday about 2.5 feet above normal, a height the agency has not recorded since 1988.
  • Marin County saw widespread tidal flooding Friday, with garages and neighborhoods swamped and closures on Highway 101 at Lucky Drive, Shoreline Highway in Mill Valley, and Doherty Drive near Redwood High, with evacuations reported on Sausalito’s Gate 5 Road.
  • Meteorologists expect an additional storm surge of roughly 1.3 feet plus renewed rain to push water farther inland through the weekend.
  • A wind advisory runs through 1 p.m. Saturday, with a 15–25% chance of isolated thunderstorms and a risk of downed trees and power outages.