The first of two waves of rain was expected to arrive in the Bay Area early Wednesday, March 5.
The updating radar map above shows current areas of precipitation in green, with greater intensities indicated by yellow and orange.
Rain is likely to be heaviest on the Peninsula and in the South Bay and Santa Cruz Mountains, the National Weather Service said. After a break Wednesday afternoon, the second system is expected to arrive in the early hours of Thursday.
In the Lake Tahoe area, a winter weather advisory is in effect from 4 a.m. Wednesday to 10 p.m. Thursday, with 6 to 12 inches of snow forecast above 7,000 feet elevation.
Yosemite is under a winter storm warning Wednesday through 1 p.m. Thursday, with up to 14 inches of snow forecast, the weather service said.