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Much of this chapter, which endeavors to answer these questions, will seem unduly technical and dryly scientific. Yet the tragic toll of human life taken every year by snow avalanches makes it necessary that every man who ventures onto steep snow slopes be capable of telling when danger exists. He must be able to say with assurance that "this slope is safe," "this slope is unsafe," or "this slope will be safe if we cross it one hour after the sun has left it." There is no short cut, no easy rule of thumb to determine whether a snow slope is in danger of avalanching. Experience alone is not enough. There may be no chance |
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