Weakly bonded old snow represents the main danger.
Avalanches can be released in the old snowpack and reach large size. This applies even in case of a single winter sport participant. The avalanche prone locations are to be found especially on west, north and east facing slopes above approximately 2000 m and in all aspects at elevated altitudes. Caution is to be exercised in particular at transitions from a shallow to a deep snowpack. Whumpfing sounds can indicate the danger. Remotely triggered avalanches are possible. In their paths avalanches can entrain the wet snow. This extends the avalanche runout distances.
Outgoing longwave radiation during the night will be severely restricted. Individual small and, in isolated cases, medium-sized wet avalanches are possible below approximately 2200 m.
Snowpack
dp.1: deep persistent weak layer dp.10: springtime scenario
Shady slopes: Distinct weak layers exist in the old snowpack in particular on west, north and east facing slopes.
The surface of the snowpack will only just freeze. The weather conditions gave rise to thorough wetting of the snowpack below approximately 2200 m.
Tendency
Weakly bonded old snow requires caution. Single winter sport participants can release avalanches as before.
Slight increase in danger of wet avalanches as a consequence of warming during the day and solar radiation.
Danger level
2000m
Avalanche Problem
Persistent weak layer
2000m
Weakly bonded old snow requires caution.
Avalanches can in some cases be released in the old snowpack and reach quite a large size on west, north and east facing slopes. This applies even in case of a single winter sport participant in some cases. The avalanche prone locations are to be found in particular above approximately 2000 m. Caution is to be exercised in particular at transitions from a shallow to a deep snowpack, when entering gullies and bowls for example. Such avalanche prone locations are barely recognisable for beginners. In little used backcountry terrain the likelihood of avalanches is higher.
Outgoing longwave radiation during the night will be reduced. Individual mostly small wet avalanches are possible below approximately 2200 m.
Snowpack
dp.1: deep persistent weak layer dp.10: springtime scenario
Shady slopes: Distinct weak layers exist in the old snowpack in particular on west, north and east facing slopes. This applies especially above approximately 2000 m.
The surface of the snowpack will only just freeze. The weather conditions gave rise to thorough wetting of the snowpack below approximately 2200 m.
Tendency
Weakly bonded old snow requires caution. Slight increase in danger of wet avalanches as a consequence of warming during the day and solar radiation.
Danger level
treeline
Avalanche Problem
Persistent weak layer
Treeline
Weak layers in the old snowpack can still be released in isolated cases.
Avalanches can in isolated cases be released in the old snowpack and reach medium size in isolated cases on northwest, north and northeast facing slopes. This applies in case of a single winter sport participant. In their paths avalanches can entrain the wet snow.
As a consequence of warming during the day individual wet avalanches are possible.
Snowpack
dp.1: deep persistent weak layer dp.10: springtime scenario
Distinct weak layers exist in the old snowpack in particular on west, north and east facing slopes.
Outgoing longwave radiation during the night will be reduced. The weather conditions as the day progresses will give rise to thorough wetting of the snowpack.
Tendency
Weakly bonded old snow and wet snow require caution.
