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The skier must accordingly consider whether there exists on any suspected slope a lubricating snow layer, either dry or wet, below the surface. Avalanches caused by the yielding of several layers are particularly dangerous because of the depth of the snow released. Effect of Slope and Ground Surface Steepness of slope.—Generally speaking, the steeper the slope, the greater the danger of avalanche. Avalanches are not likely to occur on slopes less than 22°, but can occur on lesser slopes if other conditions are unusually favorable. Much steeper slopes than this are entirely safe if snow texture and snow bondage are good. |
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