Upper Passeier Valley

Weakly bonded old snow is to be evaluated with care and prudence. Fresh wind slabs require caution.

Weakly bonded old snow is to be evaluated with care and prudence. Fresh wind slabs require caution.

In some places avalanches can be triggered in the weakly bonded old snow and reach medium size in isolated cases. The avalanche prone locations are to be found in particular on steep west to north to east facing slopes above approximately 2400 m and on steep sunny slopes above approximately 2600 m. Caution is to be exercised at transitions from a shallow to a deep snowpack. The prevalence of the avalanche prone locations will increase with altitude. Fresh wind slabs are mostly rather small but in some cases prone to triggering. Caution is to be exercised in particular on steep shady slopes at elevated altitudes, and in the regions exposed to heavier precipitation.

Towards its base, the snowpack is faceted, especially on steep west, north and east facing slopes above approximately 2400 m, as well as on steep sunny slopes at elevated altitudes. In some regions up to 10 cm of snow, and even more in some localities, will fall above approximately 1800 m. The westerly wind will transport the new snow and, in some cases, old snow as well. The various wind slabs are lying on soft layers in particular on shady slopes.

On Friday it will be very mild. The wind will be moderate to strong. The old snowpack remains prone to triggering in some places.