Middle Lys Valley

The wind slabs of the last three days must be evaluated with care and prudence.

The wind slabs of the last three days must be evaluated with care and prudence.

As a consequence of a strong wind from northerly directions, clearly visible wind slabs formed in the last three days in particular adjacent to ridgelines and in gullies and bowls. The wind slabs are to be evaluated with care and prudence in particular in very steep terrain. They can in some places be released by a single winter sport participant. Weak layers in the old snowpack can still be released in isolated cases by individual winter sport participants. This applies in particular on very steep northwest, north and northeast facing slopes above approximately 2500 m in places that are protected from the wind. As a consequence of falling temperatures, the activity of moist and wet avalanches will appreciably decrease.

As a consequence of the occasionally strong foehn wind, snow drift accumulations formed during the last three days. 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, also on shady slopes below approximately 2400 m. As a consequence of falling temperatures a crust will form on the surface during the night. Towards its base, the snowpack is wet. This applies in all aspects below approximately 2400 m, and on sunny slopes below approximately 2900 m. Little snow will fall from the afternoon.

In some localities 5 cm of snow, and even more in some localities, will fall above approximately 1500 m. As a consequence of a strong wind from southeasterly directions, further wind slabs will form.