weathervane.jpgThe National Weather Service has issued a dense fog advisory for the Bay Area this morning, with patchy fog expected to reduce visibility to less than a quarter of a mile.

The advisory will remain in effect until 11 a.m. and applies to San Francisco as well as its surrounding communities, including parts of Alameda, Contra Costa, Marin, Monterey, San Mateo, Santa Clara and Napa counties.

“It is fairly widespread making it really quite an extensive fog event,” Charles Bell, a National Weather Service meteorologist, said.

Motorists are advised to plan for a longer commute and to leave plenty of distance between cars in front of them, Bell said.

By the afternoon, the Bay Area is expected to be mostly sunny with highs in the upper 50s to mid 60s and northwest winds of 5 to 10 mph.

Clear skies are expected to continue throughout the night, becoming partly cloudy with areas of patchy fog by Tuesday morning. Lows in the mid 40s and west winds of 5 to 10 mph are also anticipated.

Mostly sunny skies are predicted for Tuesday afternoon, accompanied by highs in the lower 60s and west winds from 5 to 10 mph.

Kristen Peters, Bay City News

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