Avalanche Consequences . That's almost 1 in 3.
Avalanches can motor.
While a wet snow avalanche might slurb down a low angle slope at 5 mph or less, a dry powder cloud avalanche can rip along at 120 mph, creating an airblast with the force of a large explosive. If you are caught in this mess you can be bounced off rocks and trees, carried over tall cliffs and even twisted by the leverage of your skis, poles or snowboard. If you survive the ride and are buried completely, suffocation becomes your big problem. Avalanche debris isn't light and fluffy, even if it started out that way. The kinetic energy of the moving snow creates heat from friction that causes the snow to set up like concrete the instant it stops moving.