Wet snow
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Wet-snow avalanches due to rainfall and warmth - Heed small-area snowdrifts
Wet-snow avalanches due to rainfall and warmth - Heed small-area snowdrifts
Moderate avalanche danger prevails. Due to rainfall and higher temperatures the snowpack is forfeiting its firmness. As a result, small-to-medium wet-snow avalanches can trigger naturally on very steep slopes in all aspects. On steep grassy slopes, increasingly frequent small-to-medium glide-snow avalanches are possible. At high altitudes, the fresh fallen snow and freshly generated snowdrifts are prone to triggering in places. Such danger zones occur in steep ridgeline terrain and in wind-loaded gullies and bowls. One sole person can trigger small-to-medium sized avalanches.
Due to warmth on Tuesday, a mild night with rainfall up to high altitudes, the snowpack is weakened. Fresh and older snowdrift accumulations increase in size and frequency with ascending altitude. Inside the drifts are weak layers, e.g. graupel. Fresh snow and drifts lie deposited atop a thoroughly wet and thereby weakened snowpack surface. At low altitudes the fresh snow of recent days fell on bare ground.
Nocturnal hours: after midnight precipitation will set in. At low altitudes below 1000-1500m from Lake Constance into the Vorderwald it will soon turn to rain. Wednesday: extensive cloud cover, rising temperatures. Below 1500m as of the morning hours, light rainfall, up to 2000 m in the afternoon. Visibility is often diffuse, foggy at high altitudes. At 2000 m: -1 to +2 degrees. Brisk to strong NW winds.
Thursday will be very cloudy, some rainfall is expected up to nearly 2000 m. Brisk to strong westerly winds. Avalanche danger is not expected to change significantly.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)