Boletín de aludes

Aspiring

New Zealand Avalanche Advisory
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Peligro de aludes

High Alpine · above 2,000 m
2 · Moderado
Alpine · 1,500 m–2,000 m
2 · Moderado
Sub Alpine · below 1,500 m
1 · Débil
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Desactualizado: este boletín caducó 2 weeks ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Storm slabs formed from Friday and Saturday evening's snowfalls may be reactive around some isolated features. Warming temperatures this afternoon may produce wet avalanche activity.

Extra care should be taken where the runouts of even a small event are likely to be poor.

Identify and avoid areas of concern.

Problemas de aludes

  • Storm Slabs

    • Todas las altitudes
    Probabilidad
    Possible
    Tamaño
    1.5

    Above around 1700m 20-30cm of new snow may have fallen since Friday. A reactive storm slab is possible on all aspects, as light winds have shifted from the north on Friday to the east and then south on Sunday. Temperature changes during the storm may also have promoted slab development.

    Although not expected to be large in size, extra care should be taken around steep features that have received new loading, particularly where the runouts of even a small slide may have poor consequences.

  • Loose Wet

    • Todas las altitudes
    Probabilidad
    Possible
    Tamaño
    1.5

    With fresh snow and warming temperatures forecast for the afternoon loose wet avalanches may occur on steeper solar aspects.

Recent Avalanche Activity

No recent reports of avalanches.

If you see any recent avalanche occurrences or have any relevant snowpack information or photos, you can share them via the Public Observations link on the NZAA home page.

Current Snowpack Conditions

Approximately 10cm of new snow fell above 1700m on Friday and a further 10- 20 cm on Saturday night (possibly more towards Mt Brewster). Moderate northerly winds on Friday shifted to easterly late Saturday evening.

Before this, on 1st - 4th of August, very strong winds from the west and south have significantly stripped any exposed faces and features; other downwind areas in the lee have been left with variable surface conditions and multiple layers of very dense hard slab ranging from 10-60cm thick. This slab now appears very stubborn and unreactive. Large cornices have also formed above 1800m.

The snowpack is still relatively shallow for the time of year. Approximately 60- 70 cm below 1700m and 120cm at 2000m. Crevasses are still very open, and many rock features are still visible, particularly on west-facing aspects.

Although the lower part of the snowpack also appears consolidated and unreactive, the Aspiring region is very large, and there is still limited data. Caution should still be taken, particularly in steeper, more extreme terrain where unknown weaknesses may exist.

Mountain Weather

Cloud clearing and becoming fine in the morning.

Wind at 1000 metresSoutherly 30 km/h, dying out in the afternoon.

Wind at 2000 metresSoutherly 30 km/h, dying out in the morning.

Wind at 3000 metresSouthwesterly 30 km/h, dying out in the evening.

Freezing level 1800 metres, lifting to 2100 metres at night.

Sliding Danger

Exposed areas such as ridgelines on west and south aspects may have been stripped back to old ice layers by recent strong winds. Depending on your objective, an ice axe and crampons could be necessary.

Forecast Confidence

Moderate

  • We are uncertain due to a limited number of field observations.
  • We are uncertain whether the wind will be enough to form new wind slabs.

New Zealand Avalanche Advisory (NZ Mountain Safety Council)

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