European avalanche danger scale | icgc

European avalanche danger scale

European avalanche danger scale (2018/19) (EAWS)

 Danger levelIconSnowpack stabilityLikelihood of triggering
5Very high
Imatge
4 High - 5 Very high
The snowpack is poorly bonded and largely unstable in general.Numerous very large and often extremely large natural avalanches can be expected, even in moderately steep terrain*.
4HighThe snowpack is poorly bonded on most steep slopes*.Triggering is likely, even from low additional loads**, on many steep slopes*. In some cases, numerous large and often very large natural avalanches can be expected.
3Considerable
Imatge
3 Considerable
The snowpack is moderately to poorly bonded on many steep slopes*.Triggering is possible, even from low additional loads**, particularly on the indicated steep slopes*. In certain situations some large, and in isolated cases very large natural avalanches are possible.
2Moderate
Imatge
2 Moderate
The snowpack is only moderately well bonded on some steep slopes*; otherwise well bonded in general.Triggering is possible, primarily from high additional loads**, particularly on the indicated steep slopes*. Very large natural avalanches are unlikely.
1Low
Imatge
1 Low
The snowpack is well bonded and stable in general.Triggering is generally possible only from high additional loads** in isolated areas of very steep, extreme terrain*. Only small and medium natural avalanches are possible.

 

(*) The avalanche-prone locations are described in greater detail in the avalanche bulletin (altitude, slope aspect, type of terrain):  
• Moderately steep terrain: slopes shallower than about 30 degrees.
• Steep slopes: slopes steeper than about 30 degrees.
• Very steep, extreme terrain: particularly adverse terrain related to slope angle (more than about 40 degrees), terrain profile, proximity to ridge, smoothness of underlying ground surface.
 

(**) Additional loads:  
• Low: individual skier / snowboarder, riding softly, not falling; snowshoer; group with good spacing (minimum 10m) keeping distances.
• High: two or more skiers / snowboarders etc. without good spacing (or without intervals); snowmachine; explosives.
 

Natural:  
• Without human influence.