Slight increase in danger of wet avalanches in the course of the day.
As the day progresses as a consequence of warming during the day and solar radiation there will be an increase in the danger of wet avalanches. Wet avalanches can in some places be released by a single winter sport participant. This applies on very steep shady slopes below approximately 2500 m, as well as on very steep sunny slopes at elevated altitudes. Small and medium-sized natural avalanches are possible in the afternoon.
Individual avalanche prone locations for dry avalanches are to be found on very steep shady slopes above approximately 2500 m. Especially transitions from a shallow to a deep snowpack are unfavourable. The avalanche prone locations are difficult to recognise.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Evening and first half of night: Some snow will fall in some regions. Second half of night: Outgoing longwave radiation during the night will be quite good in some places.
The surface of the snowpack will freeze to form a strong crust and will soften during the day. Sunshine and high temperatures will give rise to rapid softening of the snowpack at intermediate and high altitudes. Shady slopes above approximately 2500 m: Faceted weak layers exist in the bottom section of the old snowpack at elevated altitudes.
Tendency
The danger of wet avalanches will persist.
Danger level
Avalanche Problem
Wet snow
Individual avalanche prone locations for wet avalanches are to be found in particular on very steep shady slopes.
As a consequence of warming during the day and the solar radiation, the likelihood of wet avalanches being released will increase a little.
As the penetration by moisture increases individual wet slab avalanches are possible as the day progresses. This applies in particular in case of releases originating from high-altitude shady starting zones that have retained the snow thus far, especially between approximately 2200 and 2600 m. In isolated cases avalanches are medium-sized. Avalanches can release the wet snowpack. This extends the avalanche runout distances.
Snowpack
dp.10: springtime scenario
Evening and first half of night: Some rain will fall in some regions. Second half of night: Outgoing longwave radiation during the night will be quite good at times. The snowpack is wet and its surface has a melt-freeze crust. The surface of the snowpack will soften quickly. In particular on steep sunny slopes as well as below approximately 1800 m only a little snow is now lying.
Tendency
The danger of wet avalanches will decrease.
Danger level
2500m
Avalanche Problem
Wet snow
2500m
Persistent weak layer
2500m
Weakly bonded old snow and wet snow require caution.
Slight increase in danger of wet avalanches as a consequence of warming during the day. Wet avalanches can in isolated cases be released by a single winter sport participant. In very isolated cases these can release the weakly bonded old snow as well and reach large size. This applies on very steep shady slopes below approximately 2500 m.
Dry avalanches can additionally be released, even by small loads in isolated cases, especially on very steep northwest, north and northeast facing slopes above approximately 2500 m. Especially transitions from a shallow to a deep snowpack are unfavourable. The avalanche prone locations are difficult to recognise.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Outgoing longwave radiation during the night will be reduced. The surface of the snowpack will freeze very little. Above approximately 1800 m snow will fall in some regions. The snowpack is moist, in particular on sunny slopes in all altitude zones, as well as on west, north and east facing slopes below approximately 2500 m. Steep west, north and east facing slopes: Faceted weak layers exist in the bottom section of the old snowpack at elevated altitudes.
Tendency
Outgoing longwave radiation during the night will be reduced. Some snow will fall in some regions.
Danger level
Avalanche Problem
Wet snow
Wet snow requires caution.
As a consequence of warming during the day, the likelihood of wet avalanches being released will increase a little. Wet avalanches can in isolated cases be released by a single winter sport participant. The avalanche prone locations are to be found in particular on very steep northwest, north and northeast facing slopes at elevated altitudes. Avalanches can in very isolated cases release the saturated snowpack and reach medium size.
Snowpack
dp.10: springtime scenario
Some snow will fall in some localities. The snowpack is wet all the way through and its surface has a crust that is barely capable of bearing a load. The surface of the snowpack will soften quickly.
