Avalanche 13
Avalanche 13 : Natural Disaster. Also: Snow Slide, slide, sluff. Technically, a mass of loosened snow, ice, and/or earth suddenly and swiftly sliding down a mountain. In practice, assumed to be a snow avalanche unless another term such as ice, rock, mud, etc is used. Synonymous with "snow slide". "Sluff" is sometimes used to refer to a small avalanche, usually a loose snow avalanche