Champdepraz Monte Avic

Weak layers in the old snowpack represent the main danger.

Weak layers in the old snowpack represent the main danger.

Especially places where weaknesses exist in the old snowpack are unfavourable. This applies in particular on very steep shady slopes at the base of rock walls and behind abrupt changes in the terrain, caution is to be exercised at transitions from a shallow to a deep snowpack. Here the avalanches can be triggered in the weakly bonded old snow and reach medium size in some cases. The old wind slabs are covered with new snow and therefore difficult to recognise. They can be released, especially by large additional loads,, especially at their margins. Backcountry touring calls for meticulous route selection.

5 to 20 cm of snow, but less in some localities, has fallen since Saturday above approximately 2000 m. The moderate wind has transported some snow. On Saturday on very steep slopes medium-sized avalanches were released. The wind slabs are lying on top of a weakly bonded old snowpack especially on east to north to west facing aspects above approximately 2200 m. The weather conditions will facilitate a gradual strengthening of the snowpack. In particular at higher altitudes snow depths vary greatly, depending on the infuence of the wind.

The weather will be clear. These weather conditions will facilitate a change towards better conditions.