RENO, Nev. — The widow and a friend of a skier killed in an avalanche at a Lake Tahoe ski resort last year have filed separate lawsuits accusing the resort of negligently rushing to open the slopes in unsafe conditions for a holiday weekend that’s typically one of the season’s busiest. Cole Comstock, 34, of Blairsden, California, was killed and his close friend, Kaley Bloom, was seriously injured when they were swept up in the avalanche on an Alpine Meadows ski run on Jan.