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Caution: snowdrift accumulations and persistent weak layer at high altitudes, Wet-snow avalanches due to rain impact
Caution: snowdrift accumulations and persistent weak layer at high altitudes, Wet-snow avalanches due to rain impact
Dry-snow avalanches: danger zones increase with ascending altitude on steep shady terrain and in wind-loaded gullies and bowls. Triggerings mostly possible by large additional loading, but if they fracture to more deeply embedded layers they can sweep away the entire snowpack and grow to large size. Esp. in high alpine regions, small fresh drifts are prone to triggering in places. Wet-snow avalanches: naturally triggered releases are possible below 2400 m due to solar radiation and daytime temperatures rising. From E-S-W, moist slides and loose-snow avalanches as well as small-to-medium sized glide snow avalanches in all aspects on steep grass-covered slopes.
As a result of fresh snow and wind, fresh 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. Unfavorable layers persist, can be triggered by large additional loading. Where there is rain-impact the snowpack is weakened.
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)