Accidental Soldiers By Ron L. Carter
Six college friends decide to take a 10 year reunion ski trip. They are trapped in a cabin when Russia invades the United States with their Weather Warfare Program. It drops 25 feet of snow over America and 80% of the population die within the first two weeks. The six of them have to forage for food in houses where people froze to death and have to fight with the Russian Soldiers along the way.