Upper Susa and Chisone Valleys

Dry avalanches and moist snow slides during the day are possible.

Dry avalanches and moist snow slides during the day are possible.

10 to 30 cm of snow, and even more in some localities, fell in the last three days above approximately 1500 m. As a consequence of a light to moderate wind, sometimes deep wind slabs formed in particular adjacent to ridgelines and in pass areas as well as at elevated altitudes. In particular on steep shady slopes avalanches can be released in the various wind slab layers and reach large size in isolated cases. This applies in particular at transitions from a shallow to a deep snowpack, when entering gullies and bowls for example at high altitudes and in high Alpine regions. Wind slabs can in isolated cases be released, even by a single winter sport participant. As a consequence of warming during the day and solar radiation moist and wet avalanches are possible as the day progresses, in particular medium-sized ones. Backcountry touring calls for careful route selection.

Above approximately 700 m snow fell in the last three days. In particular intermediate altitudes and steep sunny slopes: The new snow is lying on top of a quite favourable old snowpack. High altitudes and the high Alpine regions: In some cases new snow is lying on the soft surface of an old snowpack. Sunshine and high temperatures will give rise as the day progresses to significant moistening of the snowpack in particular at low and intermediate altitudes.