Bulletin d’avalanche

Border Graie Alps

Arpa Piemonte
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Danger d’avalanche

Above treeline
3 · Marqué
Below treeline
2 · Modéré
Périmé — ce bulletin a expiré 7 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

As a consequence of the northwesterly wind the avalanche prone locations will become more prevalent in the late morning. At elevated altitudes a considerable avalanche danger will prevail.

Problèmes avalancheux

  • Wind slab

    • Above treeline
    Taille
    2

    Stability: very poor · Frequency: many

  • Persistent weak layers

    • Toutes altitudes
    Taille
    2

    Stability: poor · Frequency: some

Avalanche Activity

As a consequence of the northwesterly wind the avalanche prone locations will become more prevalent in the late morning. At elevated altitudes a considerable avalanche danger will prevail.

As a consequence of snowfall and the moderate to strong wind, fresh snow drift accumulations formed on Wednesday. These can in some places be released by a single winter sport participant and reach large size. This applies in particular on steep slopes also in areas close to the tree line, as well as in gullies and bowls, and behind abrupt changes in the terrain at intermediate and high altitudes. As a consequence of the moderate to strong foehn wind the avalanche prone locations will become more prevalent in the late morning. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack and natural avalanches are a clear indication of a weakly bonded snowpack. Ski touring and other off-piste activities, including snowshoe hiking, call for experience in the assessment of avalanche danger. Careful route selection and spacing between individuals are recommended.

Snowpack Structure

15 to 30 cm of snow, and even more in some localities, fell yesterday in all altitude zones. As a consequence of new snow and a moderate to strong wind from southerly directions, precarious wind slabs formed. The new snow and wind slabs are lying on soft layers in particular on wind-protected shady slopes. Intermediate and high altitudes: Individual weak layers exist in the bottom section of the snowpack in particular on very steep shady slopes.

Bulletin data: Arpa Piemonte (via EAWS / avalanche.report)

Régions couvertes