Even single winter sport participants can release avalanches easily.
In little used terrain a dangerous avalanche situation will prevail.
As a consequence of new snow and a strong to storm force northwesterly wind, further wind slabs will form in gullies and bowls and behind abrupt changes in the terrain. The new snow and wind slabs of the last few days are lying on top of a weakly bonded old snowpack. This applies on west, north and east facing slopes. The avalanche prone locations are numerous, especially in areas close to the tree line, as well as above the tree line. Winter sport participants can release avalanches easily, including large ones. Natural avalanches are still even now possible.
In addition some wet and gliding avalanches are possible. This applies especially on cut and grassy slopes below approximately 1800 m.
Snowpack
dp.1: deep persistent weak layer dp.6: cold, loose snow and wind
15 to 30 cm of snow, and even more in some localities, will fall on Tuesday. The wind will be strong to storm force in some cases. The wind will transport the new snow. Further wind slabs will form.
The snowpack will be prone to triggering over a wide area. The new snow and wind slabs are lying on top of a weakly bonded old snowpack. Distinct weak layers exist in the bottom section of the old snowpack. This applies in particular on west, north and east facing slopes in areas close to the tree line, and above the tree line.
The rain will give rise as the day progresses to gradual and thorough wetting of the snowpack at low altitude.
Tendency
Hardly any decrease in danger of dry avalanches. Gradual increase in danger of wet avalanches as a consequence of warming.
Danger level
1800m
Avalanche Problem
Persistent weak layer
1800m
Wet snow
Increase in danger of wet avalanches as a consequence of warming.
As a consequence of warming during the day and solar radiation small and medium-sized wet avalanches are possible. This applies in particular on very steep sunny slopes, and at the base of rock walls. The runout zones are to be treated with caution.
Avalanches can be released in the old snowpack and reach medium size. This applies even in case of a single winter sport participant in some cases, especially above approximately 1800 m on northwest, north and northeast facing slopes. In their paths avalanches can entrain the wet snow. This extends the avalanche runout distances.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Outgoing longwave radiation during the night will be reduced at times. The weather conditions as the day progresses will give rise to thorough wetting of the snowpack. This applies in particular on very steep sunny slopes. Distinct weak layers exist in the old snowpack in particular on west, north and east facing slopes.
Tendency
The activity of wet avalanches will increase.
Danger level
treeline
Avalanche Problem
Persistent weak layer
Treeline
Wet snow
2200m
Shady slopes: Weakly bonded old snow requires caution. Very steep sunny slopes: Increase in danger of wet avalanches as a consequence of warming.
Avalanches can be released in the old snowpack and reach large size in isolated cases on west, north and east facing slopes. This applies in case of a single winter sport participant. The avalanche prone locations are to be found in particular above the tree line. In their paths avalanches can entrain the wet snow. This extends the avalanche runout distances.
As a consequence of warming during the day and solar radiation small and medium-sized wet avalanches are possible. This applies in particular on very steep sunny slopes below approximately 2200 m. The runout zones are to be treated with caution.
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 at times. The weather conditions as the day progresses will give rise to thorough wetting of the snowpack. This applies on very steep sunny slopes below approximately 2200 m.
Tendency
The activity of wet avalanches will increase.
Danger level
treeline
Avalanche Problem
Persistent weak layer
Treeline
Wind slab
2200m
Wet snow
2200m
Outside marked and open pistes a precarious avalanche situation will prevail. Weakly bonded old snow requires caution. In addition the danger of wet avalanches will increase.
Wind slabs are very prone to triggering in all aspects above approximately 2000 m. These can in many cases be released in near-surface layers of the snowpack. Avalanches can also penetrate near-ground layers of the snowpack and reach large size on west, north and east facing slopes. As a consequence of the strong northwesterly wind individual natural avalanches are possible. The runout zones are to be avoided. Remotely triggered avalanches are possible.
In the regions neighbouring those that are subject to danger level 4 (high) the avalanche prone locations are larger.
As the penetration by moisture increases small and medium-sized wet avalanches are possible. In the event of rain this applies especially below approximately 2200 m. In addition a latent danger of gliding avalanches exists. This applies in particular on cut and grassy slopes.
Snowpack
dp.1: deep persistent weak layer dp.6: cold, loose snow and wind
10 to 20 cm of snow, and even more in some localities, will fall. As a consequence of new snow and strong wind the wind slabs will increase in size additionally. Somewhat older wind slabs are lying on surface hoar in some places. Distinct weak layers exist in the old snowpack in particular on west, north and east facing slopes. Avalanches triggered by explosives and natural avalanches have confirmed the existence of a weak snowack.
Outgoing longwave radiation during the night will be reduced. The weather conditions as the day progresses will give rise to gradual and thorough wetting of the snowpack. In the event of rain this applies especially below approximately 2200 m.
Tendency
The snowpack remains prone to triggering. The activity of wet avalanches will gradually increase.
Danger level
1800m
Avalanche Problem
Persistent weak layer
1800m
Wet snow
Weakly bonded old snow requires caution. In addition the danger of wet avalanches will increase.
Avalanches can be released in the old snowpack and reach medium size. This applies even in case of a single winter sport participant in some cases, especially above approximately 1800 m on northwest, north and northeast facing slopes. In their paths avalanches can entrain the wet snow. This extends the avalanche runout distances.
As a consequence of warming small and, in isolated cases, medium-sized wet loose snow avalanches are possible. In addition especially at the base of rock walls, individual small and medium-sized wet avalanches are possible. In the event of rain this applies especially. The runout zones are to be treated with caution.
Snowpack
dp.1: deep persistent weak layer dp.10: springtime scenario
Some rain will fall in some regions. This applies in particular below approximately 1800 m.
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
The activity of wet avalanches will increase.
Danger level
Avalanche Problem
Wet snow
Wet snow requires caution.
As a consequence of warming individual small and, in isolated cases, medium-sized wet avalanches are possible. In the event of rain this applies in particular. The runout zones are to be treated with caution.
Snowpack
dp.10: springtime scenario dp.1: deep persistent weak layer
Outgoing longwave radiation during the night will be reduced. The weather conditions will give rise to thorough wetting of the snowpack. Distinct weak layers exist in the old snowpack in particular on west, north and east facing slopes.
