Middle Lys Valley

The wind slabs are lying on top of a weakly bonded old snowpack.

The wind slabs are lying on top of a weakly bonded old snowpack.

As a consequence of a moderate foehn wind, mostly small wind slabs formed in the evening in particular adjacent to ridgelines and in pass areas. The wind slabs are lying on top of a weakly bonded old snowpack. Even single winter sport participants can release avalanches easily. Mostly the avalanches are rather small. Caution is to be exercised in particular on very steep shady slopes. Here the avalanches can be triggered in the weakly bonded old snow and reach medium size. The danger is greater in areas bordering Piedmont. Experience in the assessment of avalanche danger is recommended.

5 to 25 cm of snow, and even more in some localities, will fall until Sunday. The moderate wind will transport the snow. Faceted weak layers exist in the old snowpack in particular on shady slopes. At intermediate and high altitudes snow depths vary greatly, depending on the infuence of the wind. Surface frost is present at various exposures and altitudes, now buried by fresh snow.

Tuesday: As a consequence of the new snow the prevalence and size of the avalanche prone locations will increase during the night. The conditions will cause a slight rise in the avalanche danger.