A significant winter storm is forecast to bring heavy snow and high winds to the Sierra Nevada region this weekend. Areas above 7,000 feet could see up to 28 inches of snow, with winds reaching 90 mph along the Sierra crest. The National Weather Service (NWS) has issued warnings for dangerous travel conditions, advising residents to stay indoors. The storm is expected to affect California, Nevada, and Hawaii, with the heaviest snowfall anticipated in Mono County and the Greater Lake Tahoe area in California, and the Lake Tahoe region in Nevada. Hawaii's Big Island summits are under a winter weather advisory, with up to 6 inches of snow and ice expected.