Dense fog advisory active for North Bay Interior Valleys and Southern Monterey Bay and Big Sur Coast

Dense Fog Advisory for North Bay Interior Valleys, Southern Monterey Bay, and Big Sur Coast

The National Weather Service issued a dense fog advisory on Saturday at 6:14 a.m. for the North Bay Interior Valleys, Southern Monterey Bay, and Big Sur Coast. The advisory remains in effect until 10 a.m.

Advisory Details

The NWS San Francisco CA warns of visibility reducing to half a mile or less in dense fog.

“Low visibility could make driving conditions hazardous.”

They advise drivers to:

Hazardous Driving Conditions

The dense fog may cause visibility to drop below a quarter-mile, increasing the risk on the roads.

“Widespread dense fog will have the potential to reduce visibility to below one-quarter of a mile. Use your low beam headlights, slow down, and be prepared for periods of hazardous driving conditions due to poor visibility.”

If possible, avoiding travel in the affected region is recommended. If travel is necessary, extra caution and additional driving time should be planned.

Understanding Dense Fog Advisory

This advisory signals widespread dense fog has developed, making visibility as low as a quarter-mile or less. These conditions demand careful driving or postponement of trips.

Safety Tips When Driving in Dense Fog

Exercise caution to reach your destination safely during dense fog events.

Summary: A dense fog advisory is active in North Bay Interior Valleys and parts of Monterey Bay and Big Sur Coast, significantly reducing visibility and creating hazardous driving conditions; drivers should slow down, use low beams, and consider delaying travel.

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The Mercury News The Mercury News — 2025-11-01

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