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International Avalanche Danger Descriptors

Level 1 - Low Avalanche Danger

Natural avalanches very unlikely. Human triggered avalanches unlikely. Travel is generally safe. Normal caution advised.

Level 2 - Moderate Avalanche Danger

Natural avalanches unlikely. Human triggered avalanches possible. Use caution in steeper terrain on certain aspects.

Level 3 - Considerable Avalanche Danger

Natural avalanches possible. Human triggered avalanches probable. Be increasingly cautious in steeper terrain.

Level 4 - High Avalanche Danger

Natural and human triggered avalanches likely. Travel in avalanche terrain is not recommended.

Level 5 - Extreme Avalanche Danger

Widespread natural or human triggered avalanches certain. Travel in avalanche terrain should be avoided and travel confined to low angle terrain well away from avalanche path run-outs.