A series of avalanches in the mountains outside of Los Angeles killed three people, authorities said Saturday, while Southern California braced for more powerful storms that have pounded the area with heavy snow and rain, AP reported. A body discovered Saturday morning was one of two people reported missing a day earlier when three avalanches swept backcountry slopes in the San Gabriel Mountains. One snowboarder was found safe on Saturday morning after spending the night on the mountain. Two other skiers were pronounced dead on Friday.