A new rainstorm moved into Southern California on Thursday, prompting the National Weather Service to issue a flood advisory for much of Los Angeles County through 9:15 a.m. Forecasters said southern and eastern Los Angeles County would be hardest hit by the storm. It’s the latest of a series of storms to dump rain on the region, which has been hard hit by six years of drought. December saw a series of storms, and the weather service said downtown L.A. is now at 150% of rainfall for the season.