Bulletin d’avalanche

Rätikon West

LWD Vorarlberg
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Danger d’avalanche

Above 1,800 m
3 · Marqué
Below 1,800 m
2 · Modéré
Périmé — ce bulletin a expiré 4 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Still unfavourable conditions at high altitudes

Problèmes avalancheux

  • Wind slab

    • Toutes altitudes
  • Persistent weak layers

    • Toutes altitudes

Weather Synopsis

Nocturnal hours: light snowfall down to low lying areas from heavy cloud cover, in the latter part of the night the snowfall will taper off, clouds will disperse. In the Rhine Valley and on Lake Constance the fog will recede. Monday: sunny and adequate visibility. In the afternoon, clouds will move in from the northeast, a few snow showers will result. Temperatures will drop. At 2000 m: -10 degrees. Moderate N/NE winds.

Tendency

Tuesday will be very sunny. At 2000 m: -7 degrees. Moderate E/NE winds. Avalanche danger will diminish.

Avalanche Activity

Still unfavourable conditions at high altitudes

At high altitudes, considerable avalanche danger still prevails. Avalanche prone locations occur in wind-loaded steep terrain, also distant from ridgelines and particularly behind abrupt discontinuities in the terrain, in gullies and bowls. Size and spread of the danger zones increase with ascending altitude. Whumpf noises and glide cracks in the snowpack surface are signals of danger. Also remote triggerings and naturally triggered avalanches are possible. If avalanches fracture down to these layers they can grow to large size.

Snowpack Structure

The latest batch of fresh snow was able to settle and consolidate at low altitudes. It often blankets trigger-sensitive snowdrift accumulations. Bonding of fresh snow and drifts to the old snowpack and with itself is often poor. At high altitudes especially on steep shady slopes there are still older unfavourable layers in the snowpack. These places are not visible to the naked eye.

Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)

Régions couvertes