American and European avalanche danger scales rate avalanche hazard similarly with the exception of using slightly different colours.
- Backcountry travel is fairly safe.
- Natural or human-triggered avalanches unlikely.
- Only isolated areas of instability.
- Snowpack is generally stable.
Yellow in both American and European scales:
- Backcountry travel possible with caution.
- Natural avalanches unlikely; human-triggered avalanches possible.
- Some areas of instability.
Orange in American scale,
Ochre in European scale:
- Backcountry travel possible with extreme caution.
- Natural avalanches possible; human-triggered avalanches probable.
- Unstable areas probable.
Red in American scale,
Orange in European scale:
- Backcountry travellers should avoid steep slopes and wind-loaded slopes.
- Natural and human-triggered avalanches highly likely.
- Unstable areas highly likely on various slopes and aspects.
Black in American scale,
Red in European scale:
- Backcountry travellers should avoid any steeply angled terrain or known
- Extremely unstable layers in snowpack.
- Large destructive avalanches probable.
- Natural and human-triggered avalanches are certain.