The danger of moist and wet avalanches will already exist in the early morning. Weak layers in the upper part of the snowpack can be released in some places by people.
The danger of moist and wet avalanches will already exist in the early morning. This applies in all aspects at low and intermediate altitudes. High altitudes: As the day progresses the likelihood of dry and wet avalanches being released will increase. In the event of prolonged bright spells this applies in particular. Avalanches can in particular be released in near-surface layers and reach medium size. As a consequence of warming during the day and solar radiation individual natural avalanches are possible. Avalanche prone locations are to be found in particular on very steep west, north and east facing slopes between approximately 2200 and 2800 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 was reduced. The surface of the snowpack will already soften in the late morning. 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 a little during the day.
EARLIER Danger level
2200m
Avalanche Problem
Persistent weak layer
2200m
LATER Danger level
2200m
Avalanche Problem
Persistent weak layer
2200m
Wet snow
2800m
Weakly bonded old snow requires caution. As the day progresses the likelihood of wet avalanches being released will increase.
Dry avalanches can in some cases be released in the old snowpack, this applies even in case of a single winter sport participant in isolated cases. They can penetrate down to the ground and reach medium size. Caution is to be exercised in particular on very steep west, north and east facing slopes above approximately 2200 m, and on south facing slopes in high Alpine regions. Especially transitions from a shallow to a deep snowpack are unfavourable. Avalanche prone locations are to be found in particular in gullies and bowls, and behind abrupt changes in the terrain.
As the day progresses the likelihood of wet avalanches being released will increase especially on extremely steep east and west facing slopes. Wet avalanches can occur in particular in starting zones where previous releases have taken place. In some cases these are medium-sized and can be released easily also by a single winter sport participant. Backcountry tours should be concluded timely.
Snowpack
dp.7: snow-poor zones in snow-rich surrounding dp.10: springtime scenario
Hard 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.
Outgoing longwave radiation during the night will be quite good at times. 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. On extremely steep sunny slopes the snowpack will soften rapidly. Sunshine and high temperatures will give rise as the day progresses to increasing and thorough wetting of the snowpack.
On steep sunny slopes at low and intermediate altitudes hardly any snow is lying.
Tendency
Some starting zones have released the snow, in particular on sunny slopes.
EARLIER Danger level
LATER Danger level
Avalanche Problem
Wet snow
As the day progresses the likelihood of wet avalanches being released will increase.
The avalanche conditions in the morning are mostly favourable. From late morning the likelihood of wet avalanches being released will increase. Wet avalanches can occur in particular in starting zones where previous releases have taken place. In some cases these are medium-sized and can be released easily also by a single winter sport participant. Backcountry tours should be concluded timely.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Outgoing longwave radiation during the night will be good in some case. The surface of the snowpack will freeze to form a strong crust and will already soften in the late morning. Sunshine and high temperatures will give rise as the day progresses to increasing and thorough wetting of the snowpack.
Rather lightly snow-covered west, north and east facing slopes above approximately 1800 m: Towards its base, the snowpack is faceted.
Tendency
Some starting zones have released the snow, in particular on sunny slopes.
EARLIER Danger level
LATER Danger level
Avalanche Problem
Wet snow
As the day progresses the likelihood of wet avalanches being released will increase a little.
The avalanche conditions in the morning are mostly favourable. As the day progresses the likelihood of wet avalanches being released will increase especially on extremely steep east and west facing slopes. Wet avalanches can occur in particular in starting zones where previous releases have taken place. Mostly these are small but can be released easily also by a single winter sport participant. Backcountry tours should be concluded timely.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Outgoing longwave radiation during the night will be quite good in some case. The surface of the snowpack will freeze to form a strong crust and will soften quickly. Sunshine and high temperatures will give rise as the day progresses to increasing and thorough wetting of the snowpack.
Rather lightly snow-covered west, north and east facing slopes above approximately 2200 m: Towards its base, the snowpack is faceted.
Tendency
Some starting zones have released the snow, in particular on sunny slopes.
EARLIER Danger level
LATER Danger level
Avalanche Problem
Wet snow
As the day progresses the likelihood of wet avalanches being released will increase.
The avalanche conditions in the morning, after a clear night, are mostly favourable. As the day progresses the likelihood of wet avalanches being released will increase especially on extremely steep sunny slopes. Wet avalanches can occur in particular in starting zones where previous releases have taken place. Mostly these are small but can be released easily also by a single winter sport participant. Backcountry tours should be concluded timely.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Outgoing longwave radiation during the night will be quite good in some case. The surface of the snowpack will freeze to form a strong crust and will soften quickly. Sunshine and high temperatures will give rise as the day progresses to increasing and thorough wetting of the snowpack.
Rather lightly snow-covered shady slopes above approximately 1800 m: Towards its base, the snowpack is faceted.
Tendency
Some starting zones have released the snow, in particular on sunny slopes.
