Avalanches are possible on any slope steeper than 30 degrees and occur most frequently on slopes 35 to 50 degrees. You can use an inclinometer to see if a slope is steep enough to slide.
This slope is about 40 degrees in steepness. Perfect avalanche terrain, but steeper than some slopes which slide regularly.
Although this avalanche was triggered near the top of the slope, notice how it affected the adjoining slope and the more gentle terrain below.
Terrain that increase the consequences of being in an avalanche. Cliffs, trees, and rocks. Gullies, flat transitions, creeks and lakes.