Weakly bonded old snow requires caution. Fresh wind slabs are to be evaluated with care and prudence.
Weak layers in the old snowpack can still be released by individual winter sport participants. Caution is to be exercised in particular on steep shady slopes at high altitudes and in high Alpine regions, as well as on steep sunny slopes in high Alpine regions. The number and size of avalanche prone locations will increase with altitude. Remotely triggered avalanches are possible. In isolated cases avalanches are large. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack indicate poor snowpack stability. The fresh wind slabs are in some cases prone to triggering, in particular on steep shady slopes above the tree line, as well as in all aspects at elevated altitudes. On very steep sunny slopes wet and gliding avalanches are possible as the day progresses, this also applies on steep shady slopes at intermediate altitudes. Extensive experience in the assessment of avalanche danger is required.
Snowpack
dp.6: cold, loose snow and wind dp.1: deep persistent weak layer
Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on sunny slopes at elevated altitudes. The old snowpack will be prone to triggering in high Alpine regions. Field observations and snow profiles confirm this situation. The fresh wind slabs will be deposited on the unfavourable surface of an old snowpack in particular on steep shady slopes at high altitudes and in high Alpine regions. As a consequence of mild temperatures and solar radiation the snowpack will consolidate. Sunshine and high temperatures will give rise as the day progresses to slight moistening of the snowpack.
Tendency
Weakly bonded old snow represents the main danger. Fresh wind slabs require caution.
Danger level
2400m
Avalanche Problem
Persistent weak layer
2400m
Wind-drifted snow
2400m
Gliding snow
2400m
Weakly bonded old snow requires caution. Wind slabs are to be evaluated with care and prudence.
Weak layers in the old snowpack can still be released by individual winter sport participants. Caution is to be exercised in areas where the snow cover is rather shallow. Remotely triggered avalanches are possible in isolated cases. Mostly avalanches are medium-sized. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack indicate poor snowpack stability. The somewhat older wind slabs are in some cases still prone to triggering, in particular on steep shady slopes above approximately 2400 m. On very steep sunny slopes wet and gliding avalanches are possible as the day progresses, this also applies on steep shady slopes at intermediate altitudes. Experience in the assessment of avalanche danger is advisable.
Snowpack
dp.1: deep persistent weak layer dp.6: cold, loose snow and wind
Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above approximately 2400 m, as well as on sunny slopes at high altitudes and in high Alpine regions. The old snowpack will be prone to triggering in high Alpine regions. Field observations and snow profiles confirm this situation. The wind slabs of the weekend are in some cases still prone to triggering. They are poorly bonded with the old snowpack in particular on shady slopes. As a consequence of mild temperatures and solar radiation the snowpack will consolidate during the next few days. Sunshine and high temperatures will give rise as the day progresses to slight moistening of the snowpack.
Tendency
The weather conditions will foster a gradual strengthening of the near-surface layers. The danger of dry avalanches will decrease gradually. On shady slopes the situation is more dangerous. The danger of wet and gliding avalanches will increase a little during the day.
Danger level
treeline
Avalanche Problem
Persistent weak layer
Treeline
Wind-drifted snow
Treeline
Wet snow
2400m
Weakly bonded old snow is to be evaluated with care and prudence. Fresh wind slabs are to be avoided.
Avalanches can in some places be released in the weakly bonded old snow by a single winter sport participant, in particular on steep shady slopes at high altitudes and in high Alpine regions, as well as on steep sunny slopes in high Alpine regions. Mostly avalanches are medium-sized. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack indicate this situation. The number and size of avalanche prone locations will increase with altitude. The fresh wind slabs are in some cases prone to triggering. Caution is to be exercised on steep shady slopes at high altitudes and in high Alpine regions. On very steep sunny slopes gliding avalanches and moist snow slides are possible as the day progresses. Careful route selection is recommended. Steep slopes are to be traversed by snow sport participants one at a time.
Snowpack
dp.6: cold, loose snow and wind
Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on sunny slopes at elevated altitudes. Field observations and snow profiles confirm this situation. The wind slabs are in some cases still prone to triggering. They are poorly bonded with the old snowpack in particular on shady slopes. As a consequence of mild temperatures and solar radiation the snowpack will consolidate. Sunshine and high temperatures will give rise as the day progresses to slight moistening of the snowpack.
The wind slabs of the last few days are in some cases still prone to triggering. They are mostly rather small but can be released easily, in particular in areas where the snow cover is rather shallow. Caution is to be exercised on steep shady slopes above the tree line, as well as in all aspects at elevated altitudes. Avalanches can in very isolated cases be released in the weakly bonded old snow. Mostly avalanches are rather small. Isolated whumpfing sounds indicate this situation. On very steep sunny slopes moist snow slides and avalanches are possible as the day progresses. Careful route selection is recommended. Steep slopes are to be traversed by snow sport participants one at a time.
Snowpack
dp.6: cold, loose snow and wind dp.1: deep persistent weak layer
The wind slabs of the weekend are in some cases still prone to triggering. They are poorly bonded with the old snowpack in particular on shady slopes. Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on sunny slopes at intermediate and high altitudes. Field observations and snow profiles confirm this situation. As a consequence of mild temperatures and solar radiation the snowpack will consolidate during the next few days. Sunshine and high temperatures will give rise as the day progresses to slight moistening of the snowpack.
Tendency
The weather conditions will foster a slow strengthening of the near-surface layers. The danger of dry avalanches will decrease gradually. On shady slopes the situation is less favourable. The danger of wet and gliding avalanches will increase a little during the day.
