Where Do They Occur?
About 90% of all the avalanches begin on slopes between 30 to 45 degrees; about 98% of all the avalanches occur on slopes between 25 to 50 degrees. Avalanches start most often on slopes above the timberline that face away from prevailing winds. Avalanches can run, however, on small slopes well below the timberline, such as gullies, road cuts, and small openings in the trees. Very dense trees can anchor the snow to steep slopes and prevent avalanches from starting; however avalanches can release and travel through a moderately dense forest. Most avalanches occur in the backcountry, outside of developed ski areas.
Back To Home Page