Middle Lys Valley

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

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

As a consequence of new snow and a moderate wind from variable directions, soft wind slabs formed in the last three days in all aspects, especially above the tree line. They are lying on top of a weakly bonded old snowpack in all aspects. Even single winter sport participants can release avalanches, including medium-sized ones. Especially on shady slopes the avalanches can be triggered in deep layers of the snowpack and reach large size in isolated cases. As the weather worsens, dangerous spots will be difficult to spot. Backcountry touring and other off-piste activities call for meticulous route selection.

10 to 30 cm of snow, and even more in some localities, fell in the last few days above approximately 2000 m. The moderate wind has transported the new snow. Over a wide area 10 to 25 cm of snow, and up to 30 cm in some localities, will fall until Wednesday. Faceted weak layers exist in the old snowpack in particular on north, east and west facing slopes. Surface frost is present at various exposures and altitudes, now buried by fresh snow. On Sunday on steep slopes small and medium-sized avalanches were reported.

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