Bulletin d’avalanche

Fiordland

New Zealand Avalanche Advisory
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Danger d’avalanche

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

Points saillants

Wednesday is forecast to have clear sunny skies and a freezing level of around 2500m. It might be possible to trigger wet loose sluffs on the steep sunny ground on Wednesday. Move somewhere colder or flatter if the snow starts moving

Watch for any small pockets of wind slab which may remain at the very high elevations.

Problèmes avalancheux

  • Loose Wet

    • Toutes altitudes
    Probabilité
    Possible
    Taille
    1.5

    Loose wet slides might get triggered on the warm sunny terrain over Wednesday. Move somewhere flatter or colder if you get sluffing around you.

  • Wind Slabs

    • Toutes altitudes
    Probabilité
    Unlikely
    Taille
    1.5

    Small pockets of wind slab may remain at the highest elevations. This is most likely on the steep ground near the ridgetops or in steep gullies.

Recent Avalanche Activity

Wed 13 Aug - A series of avalanching (unsure of type) off Mt Talbot observed in the afternoon.

Tuesday 12 Aug - Loose wet activity observed on all sunny aspects throughout the Darran Mountains

Sun 9th Aug- Some wet loose activity reported during rain in the Gertrude Valley area.

Current Snowpack Conditions

Summary for week 12th-17th August

Over the 12-13th Aug around 45mm fell as snow (25cm) down to around 2000m with rain below that. The second half of the week had a sustained southerly flow with a low FAFL, down to 700m, with no precip. The FAFL is slowly rising now.

The snowpack is expected to be wet and refrozen below 1900/2000m. Above this the mid-pack may have layers, but the upper pack may be wet and refrozen. There may be a dry layered snowpack on the highest peaks, especially on the southerly half.

Fri 7th to Sun 9th. Up to 25cm fell above about 1700m in northern Fiordland. Expect some slab development in the steep ground near ridgetops. Below about 1700m expect a lattice of rain crusts or even rain-soaked snow at the very low elevations.

Mountain Weather

The sun will come out on Wed.

Sliding Danger

A refreeze of the wet snowpack has taken place, to high elevations, on all aspects. Take an axe and crampons if you're exploring.

Forecast Confidence

Moderate

  • We are uncertain due to a limited number of field observations.
  • We are uncertain due to variable freezing levels.

New Zealand Avalanche Advisory (NZ Mountain Safety Council)

Régions couvertes