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. This advisory remains in effect until 10 a.m.
The NWS San Francisco warns of visibility reduced to one-half mile or less due to dense fog. Such conditions can make driving dangerous.
"Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you."
Widespread dense fog may reduce visibility to below one-quarter of a mile, increasing the risk on the roads.
A dense fog advisory means that dense fog has developed across a wide area, causing visibility to drop to a quarter-mile or less. These conditions can challenge travel safety and require heightened caution or postponing trips.
"If you must travel, allow extra drive time to reach your destination safely."
When driving in fog is unavoidable, prioritize slowing down and extending your travel time to navigate safely.
The fog advisory signals greatly reduced visibility across several California regions, urging drivers to exercise caution or avoid travel to stay safe.