Aoraki/Mt Cook — Avalanche Forecast

Avalanche danger in Aoraki/Mt Cook (New Zealand) is 3 — Considerable, valid for Tuesday, November 17, 2026. Published by New Zealand Avalanche Advisory.

Valid for
Published:
Maximum Danger
3 · CONSIDERABLE
Aoraki/Mt CookNZ-mt-cook
3

Heavy rain has arrived, expect loose wet and wet slab activity to increase, and windslab to develop up high. Ice cliffs and rock fall have been active over the week, some have triggered large avalanches.

Danger by Elevation

Alpine3Considerable
Treeline3Considerable
Below treeline1Low

Active Avalanche Problems

Wet Snow
Wet Snow
Treeline and above
Size2/5
FrequencyLikely
StabilityPoor
Wind Slab
Wind Slab
Alpine
Size2/5
FrequencyPossible
StabilityFair
Wet Snow
Wet Snow
Treeline
Size2/5
FrequencyPossible
StabilityFair

A size 2 wet slab was reported below Cinerama Col on a Sw aspect, 2000m elevation, November 14 Reports of loose wet avalanching up to size 1.5 at the head of the Tasman on November 12, on most aspects. A size 4 wet slab was observed to have run into the Tasman valley next to the Freshfield Glacier on November 8, triggered by rockfall. It was triggered at about 2000m elevation and ran about 1500m distance and around 800m vertical.  ForecastHeavy rain with snow to 2700 metres, clearing to fine in the afternoon.Wind at 1000 metresNorthwesterly 55 km/h, dying out in the morning.Wind at 2000 metresNorthwesterly severe gale 100 km/h, easing to gale 70 km/h in the morning, then to in the afternoon, then dying out in the evening.Wind at 3000 metresNorthwesterly severe gale 95 km/h, easing to gale 70 km/h in the morning, then to 50 km/h in the afternoon.Freezing level3100 metres, lowering to 1800 metres in the afternoon. An ice axe and crampons are essential for safe travel on snow in spring conditions.

A wet and warm early November has left the pack below 2500m moist, with plenty of rain falling. Conditions at higher elevations will be more layered where recent precipitation fell as snow. There has been significant snow loss at lower elevations. Heavy rain is overnight Sunday and into Monday will further weaken mid and low elevation snow, while windslab will develop above .

Source: New Zealand Avalanche Advisory · View Original Bulletin

Original (EN)

Frequently asked questions

What does avalanche danger level 3 (Considerable) mean?

Dangerous avalanche conditions — a single person can trigger avalanches on many steep slopes; cautious route selection is essential.

How often is the Aoraki/Mt Cook forecast updated?

Avycast refreshes hourly; the bulletin is republished by New Zealand Avalanche Advisory usually once a day during the season.

Who publishes the Aoraki/Mt Cook avalanche forecast?

New Zealand Avalanche Advisory — the official warning service. Avycast aggregates and translates it; always check the original bulletin.

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