Valgrisenche

Some snow will fall during the night in some regions. The backcountry touring conditions remain generally favourable.

Some snow will fall during the night in some regions. The backcountry touring conditions remain generally favourable.

The sometimes strong wind will transport the new snow. The fresh wind slabs represent the main danger. They are easy to recognise but to be assessed with care and prudence. Individual small moist snow slides are possible as the day progresses, in the event of prolonged bright spells in particular on extremely steep sunny slopes. Weak layers in the old snowpack can be released in isolated cases. These avalanche prone locations are to be found in particular on very steep shady slopes above approximately 2500 m and at transitions from a shallow to a deep snowpack.

In some regions 2 to 10 cm of snow fell on Tuesday above approximately 2200 m. This snow will be deposited on surface hoar in particular on shady slopes. Towards its surface, the snowpack is largely stable and its surface has a melt-freeze crust that is strong in many cases. Especially steep shady slopes high altitudes and the high Alpine regions: Snow that is very compacted on the surface and stabilised by the stormy winds at the end of February, or composed of faceted crystals and, locally, snow with weak cohesion and surface frost. Weak layers exist in the old snowpack here. Adjacent to ridgelines and in pass areas as well as at high altitude snow depths vary greatly, depending on the infuence of the wind. In some regions 5 to 15 cm of snow, and up to 20 cm in some localities, will fall during the night above approximately 2200 m.

The weather will be sunny. Slight increase in danger of moist and wet avalanches as a consequence of warming during the day and solar radiation. This applies on very steep sunny slopes below approximately 2700 m.