Wind slab
- Alle Höhenlagen
Fresh snowdrifts at high altitudes. Wet snow at intermediate altitudes due to rain.
Fresh snowdrifts at high altitudes. Wet snow at intermediate altitudes due to rain.
Fresh fallen snow requires attentiveness at high altitudes, it can be triggered as a slab avalanche by one sole person, particularly in ridgeline terrain in NW/N/SE facing terrain and in wind-loaded gullies and bowls. Frequency and size of danger zones increases during the course of the day and with ascending altitude. In wind-impacted zones the snowpack is being weakened. Particularly on shady slopes, in zones which have not yet discharged at intermediate altitudes, naturally triggered loose-snow and (on smooth grassy slopes) glide-snow avalanches can be expected.
The snowpack beneath cloudy skies cannot muster sufficient outgoing nocturnal radiation and will become thoroughly wet on Tuesday as rainfall sets in. Precipitation will be accompanied by strong westerly winds, fresh snowdrift accumulations will be generated and increase during the course of the day. On shady slopes at high altitudes the drifts are particularly prone to triggering. The old snowpack is otherwise compact and stable. Below 1400 m there is hardly any snow on the ground.
Nocturnal hours: precipitation will set in during the latter part of the night, snowfall level at 1500 m. Tuesday: low-lying clouds, poor visibility, shower-like rain, snowfall level above 1500 m, more or less all day long. At 2000 m: 0 to -2 degrees. Brisk westerly winds.
Wednesday will be variable with heavy cloud cover, showers as evening approaches. Often strong W/SW winds at high altitudes. The danger of dry-snow avalanches will increase over the next few days. The danger of wet-snow avalanches will recede.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)