Bulletin d’avalanche

Upper Passeier Valley

LWD Südtirol
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Danger d’avalanche

Above 2,100 m
4 · Fort
Below 2,100 m
2 · Modéré
Périmé — ce bulletin a expiré 6 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Outside marked and open pistes a dangerous avalanche situation will be encountered in some regions.

Problèmes avalancheux

  • Persistent weak layers

    • Above 2,100 m
    Taille
    3

    Stability: very poor · Frequency: many

  • Wind slab

    • Above treeline
    Taille
    2

    Stability: poor · Frequency: some

Avalanche Activity

Weak layers in the old snowpack can be released very easily. Fresh wind slabs are to be evaluated critically.

Distinct weak layers in the old snowpack can be released easily by individual winter sport participants. This applies on west, north and east facing slopes above the tree line. Avalanches can reach large size in isolated cases. Caution is to be exercised in particular on north and east facing slopes above approximately 2200 m. Here such avalanche prone locations are more widespread. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack and fresh avalanches serve as an alarm indicating the danger. Remotely triggered avalanches are possible. In addition the fresh wind slabs of the last few days in gullies and bowls, and behind abrupt changes in the terrain are prone to triggering in some locations. Such avalanche prone locations are to be found on north, east and southeast facing slopes above the tree line. Individual avalanche prone locations are to be found in areas close to the tree line. The prevalence of avalanche prone locations and likelihood of triggering will increase with altitude. The avalanche situation is a little more favourable in highly frequented terrain.

Snowpack Structure

Over a wide area 20 to 40 cm of snow, and even more in some localities, has fallen since Sunday. The wind was strong to storm force at times. The snowpack will be prone to triggering. The new snow and wind slabs are bonding only slowly with the old snowpack. In some places various wind slab layers are lying on surface hoar. Distinct weak layers exist in the bottom section of the snowpack on west, north and east facing slopes.

Tendency

Weak layers in the old snowpack represent the main danger. Thursday: Up to 10 cm of snow, and even more in some localities, will fall. The wind will be strong to storm force at times. The new snow and wind slabs are bonding poorly with the old snowpack in many places in all aspects.

Bulletin data: Avalanche Warning Service South Tyrol, avalanche.report (CC BY 4.0)

Régions couvertes