Upper Passeier Valley

Weakly bonded old snow is to be evaluated with care and prudence.

Weakly bonded old snow is to be evaluated with care and prudence.

Weak layers in the old snowpack can still be released by individual winter sport participants. This applies in particular on very steep shady slopes above approximately 2200 m, as well as on very steep east and west facing slopes above approximately 2400 m. Caution is to be exercised on little used shady slopes. In addition the older wind slabs at high altitudes and in high Alpine regions are capable of being triggered in isolated cases still. As the day progresses the likelihood of wet avalanches being released will increase, in particular on sunny slopes below approximately 2600 m. Backcountry tours should be concluded timely.

Faceted weak layers exist in the old snowpack, especially on shady slopes above approximately 2200 m, as well as on east and west facing slopes above approximately 2400 m. The old wind slabs are in individual cases still prone to triggering at high altitudes and in high Alpine regions. Outgoing longwave radiation during the night will be reduced in some case. The surface of the snowpack is frozen, but not to a significant depth and will soften during the day. The weather conditions will bring about a slight weakening of the snowpack as the day progresses.

The danger of dry avalanches will decrease gradually. As the day progresses as a consequence of warming during the day and solar radiation there will be only a slight increase in the danger of wet avalanches.