Thin Ice: Recognizing and Reacting

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As much as emphasis should be placed on avalanche safety, there’s another danger, sometimes unpredictable, to consider during winter expeditions: Ice. Ice varies a great deal in strength; accordingly, so too should your choice to cross it. Before Deciding to Cross A number of factors affect the stability of ice. Consider them, and avoid dangerous crossings first and foremost. If you think the water is deep enough to submerse you, or moving fast enough to sweep you underneath it, don’t cross. Snow-covered ice may be thin, as snow insulates the water’s surface, limiting freezing. Slow-moving or standing water is more likely to be frozen solid enough to hold your weight. Avoid ice over the fastest current of moving water. Spots where streams enter and leave lakes are notorious for thin ice. Springs bringing water into a lake may create a thin
As much as emphasis should be placed on avalanche safety, there’s another danger, sometimes unpredictable, to consider during winter expeditions: Ice. Ice varies a great deal