Middle Lys Valley

Individual weak layers exist in the snowpack. Increase in danger of dry avalanches as a consequence of the strong wind.

Individual weak layers exist in the snowpack. Increase in danger of dry avalanches as a consequence of the strong wind.

The wind will be strong at times especially along the border with France and along the border between Valais and France. The fresh wind slabs will form adjacent to ridgelines and in gullies and bowls and generally at elevated altitudes. The wind slabs are to be evaluated with care and prudence in particular in very steep terrain. Weak layers in the old snowpack can still be released in isolated cases by individual winter sport participants. They can in some cases reach medium size. This applies in particular on very steep northwest, north and northeast facing slopes above approximately 2300 m in little used backcountry terrain. Such avalanche prone locations are barely recognisable, even to the trained eye. As the temperature drops there will be a decrease in the danger of moist and wet avalanches. On very steep sunny slopes individual moist and wet avalanches are possible. In some places avalanches can release the wet snowpack.

Little snow will fall on Saturday especially along the border with France and along the border with Switzerland. A clear night will be followed in the early morning by favourable conditions. As a consequence of mild temperatures and solar radiation the snowpack consolidated during the last few days, in particular on steep sunny slopes below approximately 2800 m, this also applies on shady slopes below approximately 2200 m. Sunshine and high temperatures gave rise to moistening of the snowpack in particular on sunny slopes below approximately 2800 m. 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 2200 m. In particular at intermediate altitudes less snow than usual is lying. On sunny slopes below approximately 2100 m hardly any snow is lying.

Increase in danger of dry avalanches as a consequence of the moderate to strong northwesterly wind, in particular in high Alpine regions. As a consequence of warming during the day and solar radiation there will be a gradual increase in the danger of moist and wet avalanches.