Increase in avalanche danger as a consequence of warming during the day and solar radiation. Weak layers in the upper part of the snowpack can be released in some places by people.
As a consequence of warming during the day and the solar radiation, the likelihood of moist and wet avalanches being released will increase. Avalanches can in particular be released in near-surface layers and reach medium size. This applies in all aspects in particular below approximately 2400 m, also on very steep sunny slopes in particular at elevated altitudes.
Avalanche prone locations for dry avalanches are to be found also on very steep west, north and east facing slopes above approximately 2400 m. The avalanche prone locations are difficult to recognise. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack can indicate the danger.
Avalanches can in isolated cases penetrate near-ground layers of the snowpack and reach large size.
Snowpack
dp.10: springtime scenario dp.4: cold following warm / warm following cold
Outgoing longwave radiation during the night will be quite good. The surface of the snowpack has frozen to form a strong crust only at high altitudes and will already soften in the late morning. The snowpack will become increasingly wet all the way through. This applies in all aspects at low and intermediate altitudes, as well as on steep sunny slopes at elevated altitudes.
Isolated avalanche prone weak layers exist in the top section of the old snowpack, especially on west, north and northeast facing slopes between approximately 2200 and 2800 m, and on sunny slopes in high Alpine regions.
Towards its base, the snowpack consists of faceted crystals, in particular on west, north and east facing slopes at elevated altitudes.
Tendency
Outgoing longwave radiation during the night will be good over a wide area. The avalanche danger will increase during the day.
EARLIER Danger level
2400m
Avalanche Problem
Persistent weak layer
2400m
LATER Danger level
2400m
Avalanche Problem
Persistent weak layer
2400m
Wet snow
2400m
Increase in avalanche danger as a consequence of warming during the day and solar radiation. Weak layers in the old snowpack can still be released in isolated cases.
As a consequence of warming during the day and the solar radiation, the likelihood of wet avalanches being released will increase. This applies in all aspects below approximately 2400 m, and on south facing slopes also at elevated altitudes. Wet avalanches can occur in particular in starting zones where previous releases have taken place. Sometimes avalanches are medium-sized and can be released easily also by a single winter sport participant.
In isolated cases dry avalanches can also be released in the old snowpack, this applies in case of a single winter sport participant. These avalanche prone locations are to be found in particular on very steep west, north and east facing slopes above approximately 2400 m. Especially transitions from a shallow to a deep snowpack are unfavourable. Avalanches can penetrate down to the ground and reach medium size.
Restraint should be exercised because avalanches can sweep people along and give rise to falls.
Snowpack
dp.7: snow-poor zones in snow-rich surrounding dp.10: springtime scenario
Outgoing longwave radiation during the night will be quite good in some case. The surface of the snowpack will only just freeze and will already soften in the late morning. Sunshine and high temperatures will give rise to increasing and thorough wetting of the snowpack.
The old wind slabs are lying on top of a weakly bonded old snowpack in particular on west, north and east facing slopes above approximately 2200 m. The snowpack will be subject to considerable local variations.
On steep sunny slopes at low and intermediate altitudes hardly any snow is lying.
Tendency
The avalanche danger will increase during the day.
Danger level
Low avalanche danger will prevail.
Avalanches can in very isolated cases be triggered in near-ground layers and reach medium size in isolated cases. As the day progresses the likelihood of wet avalanches being released will increase especially on extremely steep east and west facing slopes. In steep terrain there is a danger of falling on the hard snow surface.
Snowpack
dp.10: springtime scenario
The snowpack will be subject to considerable local variations. In particular on steep sunny slopes at low and intermediate altitudes hardly any snow is lying. The weather conditions will give rise to increasing and thorough wetting of the snowpack.
