Increase in danger of wet and gliding avalanches as a consequence of warming during the day and solar radiation.
A clear night will be followed in the early morning by favourable conditions over a wide area. As a consequence of warming during the day and the solar radiation, the likelihood of wet avalanches being released will increase gradually on very steep sunny slopes. As the penetration by moisture increases individual natural avalanches are possible in the afternoon. Avalanches can release the saturated snowpack and reach medium size in isolated cases. Gliding avalanches can also occur. The avalanche prone locations for gliding avalanches are to be found in particular on very steep grassy slopes below approximately 2600 m. Backcountry tours, off-piste skiing and ascents to alpine cabins should be started early and concluded timely.
Snowpack
dp.10: springtime scenario dp.2: gliding snow
Outgoing longwave radiation during the night will be good. The surface of the snowpack will freeze to form a strong crust. In steep terrain there is a danger of falling on the hard snow surface. Sunshine and high temperatures will give rise from the middle of the day to increasing and thorough wetting of the snowpack on sunny slopes. Towards its base, the snowpack is moist, especially on sunny slopes, as well as in all aspects below approximately 2200 m.
Tendency
Increase in avalanche danger as a consequence of warming during the day and solar radiation.
EARLIER Danger level
2500m
Avalanche Problem
Persistent weak layer
2500m
LATER Danger level
Avalanche Problem
Wet snow
Persistent weak layer
2500m
Increase in danger of moist and wet avalanches as a consequence of warming during the day and solar radiation.
As a consequence of warming during the day and the solar radiation, the likelihood of moist and wet avalanches being released will increase in particular on very steep sunny slopes below approximately 3000 m. They can penetrate deep layers and reach large size in isolated cases. Weak layers in the old snowpack can be released in isolated cases and mostly by large additional loads, in particular at transitions from a shallow to a deep snowpack. These avalanche prone locations are to be found in particular on extremely steep shady slopes above approximately 2500 m and on very steep west and east facing slopes. Avalanches can in some cases reach medium size.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Avalanche prone weak layers exist in the old snowpack especially on little used west, north and east facing slopes. This applies on shady slopes above approximately 2500 m. The snowpack will be generally subject to considerable local variations. Below the tree line a little snow is lying.
Tendency
The avalanche danger will persist.
EARLIER Danger level
LATER Danger level
Avalanche Problem
Wet snow
Increase in danger of wet avalanches as a consequence of warming during the day and solar radiation.
Early and late morning: A clear night will be followed by favourable conditions over a wide area. Individual avalanche prone locations for dry avalanches are to be found in particular on extremely steep shady slopes at elevated altitudes. Avalanches can in some cases reach medium size.
During the day: As a consequence of warming during the day and the solar radiation, the likelihood of wet avalanches being released will increase gradually on very steep sunny slopes. As the penetration by moisture increases individual natural avalanches are possible in the afternoon. Avalanches can release the saturated snowpack and reach medium size. Backcountry tours, off-piste skiing and ascents to alpine cabins should be started early and concluded timely.
Snowpack
dp.10: springtime scenario
Outgoing longwave radiation during the night will be quite good. The surface of the snowpack will freeze to form a strong crust. In steep terrain there is a danger of falling on the hard snow surface. Sunshine and high temperatures will give rise as the day progresses to a loss of strength within the snowpack in particular on sunny slopes. Towards its base, the snowpack is moist, especially on sunny slopes, as well as in all aspects below approximately 2200 m.
Isolated avalanche prone weak layers exist in the old snowpack especially on little used west, north and east facing slopes. This applies on shady slopes above approximately 2600 m, as well as on west and east facing slopes above approximately 2800 m.
Tendency
Wet snow represents the main danger.
EARLIER Danger level
1800m
Avalanche Problem
Wet snow
1800m
LATER Danger level
1800m
Avalanche Problem
Wet snow
1800m
Low avalanche danger will prevail. The danger of moist and wet avalanches will increase during the day.
Thus far only isolated mostly small moist loose snow slides are possible as a consequence of warming during the day. The avalanche prone locations are to be found in particular on very steep shady slopes above approximately 1800 m.
Snowpack
dp.10: springtime scenario
In these regions a little snow is lying in all altitude zones. The snowpack will be subject to considerable local variations. The surface of the snowpack will only just freeze and will soften quickly. Below the tree line no snow is lying.
Tendency
The avalanche danger will persist.
Danger level
Avalanche Problem
Wet snow
The danger of wet avalanches will increase during the day.
As a consequence of warming during the day and solar radiation individual wet avalanches are possible. Avalanches can in very isolated cases be released by a single winter sport participant. The avalanche prone locations are to be found in particular on very steep shady slopes at elevated altitudes. Mostly avalanches are small.
Snowpack
The surface of the snowpack will freeze to form a strong crust and will soften quickly. Isolated avalanche prone weak layers exist in the old snowpack especially on steep shady slopes. The snowpack will be generally subject to considerable local variations. Only a little snow is now lying.
Tendency
Low avalanche danger will prevail. The surface of the snowpack will cool hardly at all during the overcast night and will already be soft in the early morning.
