A fast-moving storm system is sweeping into the Bay Area and Central Coast, bringing heavy rain, strong winds and the possibility of thunderstorms, according to the National Weather Service. A wind advisory is in effect from 8 a.

Parts of the North Bay were hit hard by heavy rain and strong winds on Wednesday, causing slick roads, accidents, and flooding. The storm also raised concerns for PG&E, as downed trees and branches threaten power lines.