1,400-foot layer of fog blankets the San Francisco Bay Area

The San Francisco skyline rises above a low fog bank shrouding the bay as seen from the Lawrence Hall of Science in Berkeley, Calif. on Tuesday, Dec. 11, 2018. The San Francisco skyline rises above a low fog bank shrouding the bay as seen from the Lawrence Hall of Science in Berkeley, Calif. on Tuesday, Dec. 11, 2018. Photo: Paul Chinn / The Chronicle Buy photo Photo: Paul Chinn / The Chronicle Image 1 of / 18 Caption Close 1,400-foot layer of fog blankets the San Francisco Bay Area 1 / 18 Back to Gallery

The San Francisco Bay Area sat under a thick layer of fog Friday morning, and the cloudy conditions along with cool temperatures are expected to continue through the weekend and into next week.

A plume of fog pushed through the Golden Gate early Friday morning, spreading across the entire region. The fog measured about 1,400-feet thick, according to the National Weather Service.

"It's a moderate marine layer," says Drew Peterson, a meteorologist with the NWS Bay Area. "When it's really deep, it can get up to 3,500 feet."

The clouds are forecast to clear in the late morning. Afternoon highs will hit the 60s on the coast and 70s and low-80s inland.

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With ocean breezes kicking up Saturday, temperatures are likely to cool even more through the weekend.

On Sunday, a weak storm focused on Southern California will brush the Bay Area, delivering a heavy dose of clouds, but rain is unlikely.

"It doesn't look like the rain will make it north of Santa Cruz," Peterson says.

Next week looks to be unseasonably cool, and clouds and fog will also likely be in the mix.

"The next best chance of warming up looks to be May 12 so that's two-plus weeks away," Peterson says. "But that's looking far out and could change."