Steep Slopes
Steep Slopes : Those avalanche areas where large slab slides are most likely to start during conditions of high to extreme avalanche potential. In general, dangerous slabs most often occur on slopes in the 30 degree: 45 degree range. The upper limit of 45 degrees reflects the tendency of snow to sluff gradually off steep slopes. However, windpacked snow often accumulates on steeper terrain (45 degrees: 60 degrees) and here, too, slab slides may occur. Also, slab avalanches can propagate from high angle slopes to slopes of less than 30 degrees, and loose snow avalanches that would otherwise be harmless may spill onto lower slope, triggering dangerous slab avalanches
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