Bay Area storm could bring heavy winds, thunder, rock slides and big waves

A storm expected to douse the Bay Area on Tuesday evening could bring heavy winds, thunderstorms and potential rock slides to the region, forecasters said.

The heaviest amount of rain is anticipated after sunset with a few light sprinkles expected throughout the day, said Roger Gass, a meteorologist with the National Weather Service.

“Most areas during the day aren’t going to see much rainfall, but it will still be a little wet out there,” he said.

San Francisco will receive close to half an inch of rain and a third of an inch is expected in San Jose. The North Bay could receive up to an inch and a half of rain. Coastal mountains are expected to receive up to three inches of precipitation, Gass said.

“Overall, not a whole lot of rain,” he said.

The storm will bring strong winds that are expected to gust at 40 mph and thunder might be heard.

“Now that we’ve had several systems move through recently, it has helped the ground become a little more saturated,” Gass said, adding that the powerful winds and wet conditions could bring flooding and rock slides to some parts of the region.

A high surf advisory was issued for Tuesday night through Wednesday with large breaking waves expected along the coast.

Temperatures in the Bay Area will remain relatively mild with highs in the upper 50s throughout the day and lower 50s overnight.

By Wednesday evening, the storm should taper off, but “we are not quite done,” Gass warned.

The potential for more rainfall will continue this weekend.

“There’s still a lot of certainty heading into the weekend,” he said. “But it does look like another round of rain and possibly some gusty winds will return Friday with additional systems pushing through during the weekend.”

Sarah Ravani is a San Francisco Chronicle staff writer. Email: Twitter: @SarRavani

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