Middle Lys Valley

Rapid increase in danger as a consequence of warming during the day and solar radiation.

Rapid increase in danger as a consequence of warming during the day and solar radiation.

In particular below approximately 2400 m: The surface of the snowpack will freeze very little and will soften earlier than the day before. In the late morning the likelihood of moist and wet avalanches being released will increase quickly in all aspects. This applies on steep sunny slopes below approximately 3600 m, and on steep shady slopes below approximately 2900 m. Avalanches can in some cases penetrate deep layers reach large size in isolated cases. Backcountry tours and ascents to alpine cabins should be started and concluded very early.

On Friday it will be very warm. As a consequence of highly fluctuating temperatures a crust formed on the surface during the last few days, this also applies on shady slopes below approximately 2500 m. The spring-like weather conditions gave rise to increasing moistening of the snowpack on sunny slopes below approximately 2900 m. Towards its base, the snowpack is wet, also on shady slopes below approximately 2400 m. These weather conditions gave rise to settling of the snowpack in particular on sunny slopes.

Saturday: In the late morning the weather will be warm. The surface of the snowpack will freeze very little and will soften earlier than the day before.