| | | | | | | 1 | |  | The snowpack is generally well bonded and stable. | Triggering is generally possible only with high additional loads on very few extreme slopes. Only natural sluffs and small avalanches are possible. |  | Generally safe conditions. | 2 | |  | The snowpack is only moderately well bonded on some steep slopes, otherwise it is generally well bonded | Triggering is possible, particularly through high additional loads, mainly on steep slopes indicated in the bulletin. Large natural avalanches are not expected. |  | Mostly favourable conditions. Careful route selection, especially on steep slopes of indicated aspects and altitude zones. | 3 | |  | The snowpack is moderately to weakly bonded on many steep slopes. | Triggering is possible, even through low additional loads mainly on steep slopes indicated in the bulletin. In certain conditions, some medium and occasionally large natural avalanches are possible. |  | Partially unfavourable conditions. Experience in the assessment of avalanche danger is required. Steep slopes of indicated aspects and altitude zones should be avoided if possible. | 4 | |  | The snowpack is weakly bonded on most steep slopes. | Triggering is probable even through low additional loads on many steep slopes. In certain conditions, many medium and multiple large natural avalanches are expected. |  | Unfavourable conditions. Extensive experience in the assessment of avalanche danger is required. Remain in moderately steep terrain / beware of avalanche run out zones. | 5 | |  | The snowpack is generally weakly bonded and largely unstable. | Many large natural avalanches are expected, even in moderately steep terrain. |  | Highly unfavourable conditions. Avoid open terrain. | |
| WSL-Institut für Schnee- und Lawinenforschung SLF (http://www.slf.ch/) |