On Monday at 10:03 p.m. the National Weather Service issued a dense fog advisory in effect until Tuesday Nov. 25, at 11 a.m. for North Bay Interior Valleys.

The NWS San Francisco CA says to expect, “Visibility one quarter mile or less in dense fog.”

“Low visibility could make driving conditions hazardous. Limited visibility will result in hazardous driving conditions,” according to the NWS. “If driving, slow down, use your headlights, and leave plenty of distance ahead of you. If commuting, allow extra drive time to reach your destination safely.”

Guidance from the NWS for navigating foggy conditions

When a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility can plummet to a quarter-mile or less. These conditions pose challenges f

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