The most powerful Pacific storm of the season is bearing down on Northern California and Nevada. A rare blizzard warning is in effect through Sunday for a 300-mile stretch from north of Lake Tahoe to south of Yosemite National Park. Also, Del Amo Mall in Torrance is now enforcing new chaperone rules on certain days and hours. KCAL News reporter Jeff Nguyen has a look. Your top stories at the top of the hour, weekdays at 2p, 3p, and 7p streaming on CBS News Los Angeles.