Heavy snow driven by brisk winds blanketed much of the West and Rockies, but the eastern two-thirds of the nation basked in Thanksgiving Day sunshine. Twenty-two inches of new snow piled up in West Yellowstone, Mont., while, in Utah, the Alta ski resort received 15 inches, Park City had 12 and Salt Lake City got two. Scattered power outages were reported. Temperatures plummeted as the storm moved through Colorado, whipped by 40 m.p.h. winds that occasionally gusted to 60 m.p.h. Fifteen inches of new snow hit Mt. Baker, in Washington, bringing the total amount on the ground to 75 inches.