Dense Fog Advisory Issued for North Bay Interior Valleys
The National Weather Service (NWS) office in San Francisco, California, issued a dense fog advisory for the North Bay Interior Valleys. The advisory remains in effect until 10 a.m. Friday.
“Visibility one quarter mile or less in dense fog.”
“Low visibility could make driving conditions hazardous,” said the NWS. “If driving, slow down, use your headlights, and leave plenty of distance ahead of you.”
The NWS issues dense fog advisories when widespread fog reduces visibility to one-quarter mile or less, creating dangerous travel conditions. Drivers are urged to exercise caution or avoid travel if possible.
Safety Tips for Driving in Fog
- Reduce speed and drive cautiously.
- Use headlights, not high beams.
- Maintain a safe following distance.
- Stay alert for sudden stops or obstacles on the road.
Source: The National Weather Service
Originally published on November 7, 2025, at 1:52 a.m.
Author Summary
The National Weather Service warns of dangerous fog across North Bay Interior Valleys, urging drivers to slow down and maintain caution until conditions improve.
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