Jackson, Wy – Heavy snow is making the avalanche risk grow in Wyoming's backcountry. In the Bridger-Teton National forest, the avalanche center is urging people to be prepared, especially snowmobilers. Center Director Bob Comey says snowmobilers cover more ground than skiers, so they increase their chances of getting into dangerous terrain. "Snowmobiling has become more popular. The sleds have become better. So snowmobilers are starting to be about 50 percent of those fatalities." There were five avalanche deaths in Wyoming last year and three were snowmobilers.