Wind slab
- Above treeline
- Size
- 1
Stability: poor · Frequency: some
Above the treeline, snowdrifts. Loose-snow and glide-snow avalanches due to higher temperatures.
Stability: poor · Frequency: some
Stability: poor · Frequency: some
Above the treeline, snowdrifts. Loose-snow and glide-snow avalanches due to higher temperatures.
Above the treeline, fresh snowdrift accumulations are prone to triggering. Danger zones occur mostly on shady slopes behind protruberances in the landscape, in gullies and bowls and on wind-loaded slopes. Small, in isolated cases medium-sized avalanches can be triggered even by one single skier. At low altitudes, paricularly on sunny slopes, moist loose-snow avalanches and small glide-snow avalanches are possible on steep grassy slopes.
The latest bout of fresh snowfall is being deposited mostly on steep shady slopes atop metamorphosed old snowpack layers or atop surface hoar. On east-facing and sunny slopes, often atop encrusted surfaces. As a result of strong NW winds, widespread snowdrifts will accumluate. The fresh snow will be increasely poorly bonded with the old snowpack surface with ascending altitude. In places in high-altitude shady spots and where the snow is shallow, weak faceted layers are evident in the snowpack. All in all, the snowpack is highly varied: ridges are often windblown, gullies and bowls are filled to the brim with snow.
Monday will be very sunny and temperatures will rise during the course of the day. During the afternoon, thaw-weather will set in below 2000m. Winds will ease off. At 2000m: -8 to +3 degrees. Moderate to light NW winds.
Tuesday will be quite sunny and mild. Avalanche dangers are not expected to change significantly. Slides and small glide-snow avalanches are still possible.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)