Wind slab
- Alle Höhenlagen
Fresh snow and drifts prone to triggering at high altitudes - Where rain impact: wet avalanches
Fresh snow and drifts prone to triggering at high altitudes - Where rain impact: wet avalanches
Fresh snowdrift accumulations at high altitudes can trigger small-to-medium sized slab avalanches by large additional loading. Danger zones occur esp. in steep ridgeline terrain in NW/N/SE aspects and in wind-loaded gullies and bowls. In zones where there is rain impact, slides and small wet avalanches can be expected in all aspects. On steep smooth grassy slopes, small glide-snow avalanches are possible.
There has been 20-30 cm of frsh snow registered at high altitudes, deposited atop a moist, compact and settled snowpack surface. Intermittent strong westerly winds transported the snow, generated new snowdrifts. Fresh and older drifts are increasingly prone to triggering with ascending altitude. Due to rain, mild temperatures and reduced nocturnal outgoing radiation, the snowpack has been weakened at intermediate altitudes.
Nocturnal hours: the foehn terminated during the night, skies became cloudy, after midnight heavy rainfall set in (snowfall above 1600m). Tuesday: snowfall, level at 1600-1300m. The precipitation will turn to showers, the snowfall level descend by evening to nearly 1000 m. At 2000 m: descending from -1 to -6 degrees. Strong westerly winds.
Wednesday will bring snow showers, later on the clouds will disperse. At 2000 m: -10 to -8 degrees, still very cold. Avalanche danger is not expected to change significantly. The risk of wet avalanches will decrease noticeably.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)