Persistent weak layers
- All elevations
Distinct weak layers in the old snowpack are treacherous. Fresh wind slabs are to be evaluated with care and prudence.
Distinct weak layers in the old snowpack are treacherous. Fresh wind slabs are to be evaluated with care and prudence.
Distinct weak layers in the old snowpack can still be released by individual winter sport participants in particular on west, north and east facing slopes. This applies in particular in particular above the tree line, and below approximately 2600 m. Caution is to be exercised in particular at transitions from a shallow to a deep snowpack, when entering gullies and bowls for example. Avalanches can reach large size. Remotely triggered avalanches are possible in isolated cases. Over a wide area avalanche prone wind slabs formed. These are to be bypassed as far as possible. The avalanche prone locations are to be found in particular on steep shady slopes above approximately 2200 m and adjacent to ridgelines and in pass areas. In addition a latent danger of gliding avalanches exists.
Faceted weak layers exist in the centre of the snowpack, especially on west, north and east facing slopes above the tree line, and below approximately 2600 m. Some snow will fall. The strong wind has transported the fresh and old snow. The fresh and older wind slabs are poorly bonded with the old snowpack in particular on shady slopes and generally at elevated altitudes. The rain gave rise to significant moistening of the snowpack over a wide area below approximately 2400 m. As a consequence of mild temperatures and partly cloudy skies the snowpack could not consolidate on Friday. As a consequence of falling temperatures a crust will form on the surface at the weekend.
Distinct weak layers in the old snowpack necessitate defensive route selection.
Bulletin data: Avalanche Warning Service Tirol, avalanche.report (CC BY 4.0)