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Avalanche danger scale

Danger levelIconSnowpack stabilityLikelihood of triggering
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*.
4 high The 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.
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.
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.
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

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Vyrobil Simopt, s.r.o., 2024

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