(RENO, Nev.) — Hundreds of homes were evacuated in northern Nevada, and stranded motorists were pulled from cars stuck on flooded Northern California roads as thunderstorms arrived as part of a massive winter storm that could be the biggest to slam the region in more than a decade. Crews in California cleared trees and debris Sunday following mudslides caused by steady rain accompanying the system that could dump 15 inches in the foothills of the Sierra and heavy snow on the mountain tops before it’s expected to move east early Monday.