Danger Scale Avalanche Danger Descriptors  Danger Level (& Color) Avalanche Probability and Avalanche Trigger Recommended Action in the Back Country ...What... ...Why... ...What To Do... LOW Natural avalanches very unlikely. Human triggered avalanches unlikely. Travel is generally safe. Normal caution advised. MODERATE Natural avalanches unlikely. Human triggered avalanches possible. Use caution in steeper terrain on certain aspects. CONSIDERABLE Natural avalanches possible. Human triggered avalanches probable. Be increasingly cautious in steeper terrain. HIGH Natural and human triggered avalanches likely. Travel in avalanche terrain is not recommended. EXTREME Widespread natural or human triggered avalanches certain. Travel in avalanche terrain should be avoided and confined to low angle terrain, well away from avalanche path runouts.