An avalanche is a rapid downward flow of snow from a mountainside. An avalanche occurs when an area of snow dislodges from the mountain and begins to descend. It can be caused by a variety of factors from unstable ice layers to loud sounds in areas of heavy snowfall.

When going into avalanche territory, it is advisable to check with the mountain or park service center to get the most updated avalanche warning status. Never go into the back country alone. Always take a buddy with you. Stay alert for snow cracks, shady areas and pay attention to the incline of the slope as well. Utilize United States Forest Service training to test the snow pack for stability.How Stuff Works: How Avalanches Work