Persistent weak layers
- Above treeline
Wind slabs and weakly bonded old snow require caution.
Wind slabs and weakly bonded old snow require caution.
Avalanches can be triggered in the weakly bonded old snow and reach medium size. The avalanche prone locations are to be found on steep shady slopes above the tree line and on steep sunny slopes above approximately 2600 m. These places are difficult to recognise. The prevalence of the avalanche prone locations will increase with altitude. Caution is to be exercised at transitions from a shallow to a deep snowpack. As a consequence of new snow and a strong to storm force wind from variable directions, avalanche prone wind slabs formed. These avalanche prone locations are to be found in particular adjacent to ridgelines and in gullies and bowls and on steep shady slopes. On wind-loaded slopes individual natural avalanches are possible, but they will be mostly small. As a consequence of solar radiation individual loose snow avalanches are possible as the day progresses.
5 to 15 cm of snow, and even more in some localities, has fallen. Some snow will fall on Tuesday, especially in the north. Since yesterday the wind has been strong to storm force over a wide area. Faceted weak layers exist in the bottom section of the snowpack at elevated altitudes. Faceted weak layers exist in the top section of the snowpack especially on shady slopes. Fresh wind slabs are lying on soft layers at elevated altitudes. The snowpack will become increasingly prone to triggering.
The avalanche danger will persist. The wind will be moderate to strong.
Bulletin data: Avalanche Warning Service Tirol, avalanche.report (CC BY 4.0)