AVALANCHES are sudden slides of snow common in BC's alpine areas. They consist either of loose snow rolling down a slope or slabs of snow that fracture and fall as a mass. (Avalanches of rock or soil are more properly called LANDSLIDES or rockslides.) When the snow is dry, avalanches move very quickly and may be accompanied by billowing powder clouds and strong ground winds. Dry snow avalanches have been clocked at speeds of up to 50 m per second. Wet snow avalanches are slower and more akin to...

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