Wet, cool conditions were expected to continue in Larkspur and Corte Madera through Sunday evening, with a chance of clearing by Monday, according to forecasters with the National Weather Service.
Marin County roads including U.S. Route 101-El Camino Real were soaked and public safety agencies advised motorists to plan extra time for the rain and slick conditions.
"It's heading through the Bay area and it's not at all unsual for this time of year," Weather Service forecaster Diana Henderson said in a phone interview from Monterey.
"Our roads are wet, there could be some ponding, so slow down," Henderson said.
Along with the rain, south winds of 8 to 17 miles per hour were expected Friday, with gusts as high as 23 mph, according to the Weather Service.
The high for Larkspur and Corte Madera on Friday was expected around 61, with overnight lows into Saturday in the mid-50s.
As of noon Friday, a flash flood watch, flood advisory and hazardous weather outlook updates were available for Larkspur and Corte Madera.
Power was reported out for some residents in Larkspur's Palm Hill neighborhood before noon Friday.
Sand bags were available for residents of Larkspur at Piper Park, according to the city. The sand bag station was at the east end of the park, near the picnic area.