Bregenzerwald Mountains

Fresh snow and drifts are prone to triggering above the treeline

Fresh snow and drifts are prone to triggering above the treeline

Fresh snow and fresh drifts can be triggered even by the weight of one skier above the treeline in particular, and release small-to-medium slab avalanches. Danger zones occur esp. in steep ridgeline terrain on NW/N/SE facing slopes and in wind-loaded gullies and bowls. Frequency and size of danger zones increase with ascending altitude. Due to higher temperatures, moist slides and loose-snow avalanches can trigger on very steep slopes at low and intermediate altitudes.

Widespread 10-20 cm of snow is expected, up to 30 cm in the Allgau Alps. Intermittently strong winds will transport the fresh snow, generate more snowdrifts above the treeline. The drifts are being deposited atop older snowdrifts and soft layers. Bonding is generally inadequate, thus prone to triggering. Inside the snowdrifts, furthermore, are weak layers.

Nocturnal hours: rainfall and snowfall from dense clouds, a bit stronger in the mountains. The snowfall level will ascend slowly to nearly 1000 m. Sunday: gray skies until afternoon, light to moderate snowfall. Mild air masses will move in, the snowfall level ascend to 1500 m. By evening precipitation will stop, clouds will disperse. At 2000 m: -6 to -2 degrees. Brisk to strong W/NW winds.

Monday will be quite sunny and mild, with foehn impact. The zero-degree level will ascend to over 3000 m. At intermediate altitudes wet avalanches will be possible. At high altitudes the snow will be transported, new drifts will be generated.