Some Bay Area residents woke up Saturday morning to thick, dense fog.
The conditions prompted the National Weather Service to issue a Dense Fog Advisory Saturday morning for the East Bay, North Bay and West Delta to the San Francisco Bay. The advisory ended at 11 a.m.
Travelers were advised to watch out for sudden visibility restrictions in dense fog, allow extra time for travel and leave plenty of space between vehicles on the roadway.
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The National Weather Service also issued an advisory for marine navigation.
Dense fog was expected to reduce visibility to two to three miles for areas of the San Francisco Bay south of the Bay Bridge.

A look at the thick fog in Walnut Creek on Saturday.
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