Bulletin d’avalanche

Arthur's Pass

New Zealand Avalanche Advisory
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Danger d’avalanche

High Alpine · above 1,800 m
3 · Marqué
Alpine · 1,200 m–1,800 m
2 · Modéré
Sub Alpine · below 1,200 m
1 · Faible
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Périmé — ce bulletin a expiré last month. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Winds are forecast to increase tomorrow, which in turn will increase the wind slab hazard. Combined with forecast new snow, the hazard will require good route selection skills for any backcountry travel. Consider runout zones, as the new snow totals get larger, there is enough snow on the ground now for avalanches to run into the valleys.

Problèmes avalancheux

  • Wind Slabs

    • Toutes altitudes
    Probabilité
    Likely
    Taille
    2

    With increasing winds tomorrow, any loose snow will be transported to new small slab avalanche conditions. Look for blowing snow and adjust your route to the increasing hazard.

  • Loose Wet

    • Toutes altitudes
    Probabilité
    Possible
    Taille
    1.5

    If the freezing level raises, the loose wet hazard will increase at lower elevations.

Recent Avalanche Activity

Nothing reported in the last few days. If you see anything, please report it in the public observations section of the NZAA website.

Current Snowpack Conditions

80mm of rain has fallen in Arthur's Pass in the last week, with the freezing level at about 2000m and gale-force NW winds. The second half of the storm turned easterly, but only 15cm of new snow fell at lower elevations. Snow cover was zero below 2000m before the storm system and limited above 2000m.

Mountain Weather

Occasional rain, becoming persistent and heavier in the evening. Snow lowering to 1600 metres in the afternoon. Possible thunderstorms from evening. Winds Northwesterly 50 km/h, rising to gale 70 km/h in the morning, then to severe gale 90 km/h for a time in the afternoon and early evening. Freezing level 1400 metres, lifting to 1700 metres in the afternoon.

Sliding Danger

Expect firm areas from the sun melting and then the surface refreezing at night. Crampons and ice axe a good idea for ridge travel.

Forecast Confidence

Moderate

  • We are uncertain about forecast snowfall amounts.
  • We are uncertain due to the timing of the incoming weather system.

New Zealand Avalanche Advisory (NZ Mountain Safety Council)

Régions couvertes