Dense Fog Advisory issued September 11 at 7:21PM PDT until September 12 at 9:00AM PDT by NWS

…DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM PDT SATURDAY… * WHAT…Visibility a quarter mile or less in dense fog. * WHERE…San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast. * WHEN…Until 9 AM PDT Saturday.