Wet Slabs
- Todas las altitudes
- Probabilidad
- Possible
- Tamaño
- 1.5
With a much higher freezing layer forecast for this afternoon wet slab and loose wet avalanches may become an issue on solar aspects later in the day.
Boletín de aludes
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New Zealand Avalanche Advisory
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
- 2 · Moderado
Desactualizado: este boletín caducó 7 days ago. Estás viendo condiciones pasadas, no el boletín vigente.
Lo esencial
With recent rain falling up to 1900m saturating the snow pack and cold morning temperatures there will be a high sliding hazard at mid and lower elevations untill things warm up. Carry an ice axe and crampons. With a much higher freezing layer forecast for this afternoon wet slab and loose wet avalanches may become an issue on solar aspects later in the day. Plan your routes avoiding these slopes later in the day.
Above 1900m there may remain isolated pockets of unstable wind slab in steeper terrain.
Problemas de aludes
Loose Wet
- Todas las altitudes
- Probabilidad
- Possible
- Tamaño
- 1.5
With a much higher freezing layer forecast for this afternoon wet slab and loose wet avalanches may become an issue on solar aspects later in the day.
Wind Slabs
- Todas las altitudes
- Probabilidad
- Unlikely
- Tamaño
- 1.5
A dusting of snow and wind from the south on Saturday and again yesterday may have seen new pockets of wind slab develop at higher elevations on slopes lee to the south quarter.
Recent Avalanche Activity
On the 14th wet slab and loose wet avalanches were observed at mid and lower elevations due to the a warm wet cycle. Above 1900m isolated natural wind slab activity was observed in pockets of steeper terrain on slopes lee to the west.
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
Above 1900m: There was a dusting of snow Saturday accompanied by moderate southerly winds. Approximately 15-40cm of new snow fell from Tuesday to Thursday. This snow has largely bonded well to the old snow surface and the upper and mid pack are generally showing settled characteristics as total snow depths have increased and with warmer temperatures recorded. With the very strong winds experienced throughout the winter there is a high degree of spatial variability in the distribution of snow and there are still areas of unusually shallow snowpack at all elevations. The lower part of the snowpack appears consolidated and unreactive. Large cornices have also formed above 1800m.
Below 1900m rain last has saturated the snow pack creating a very stout supportive rain crust. With cold morning temperatures there is a very slick snow surface.
Caution should still be taken, particularly in steeper, more extreme terrain where unknown weaknesses may exist.
Mountain Weather
Fine.
Wind at 1000 metres: Southerly 40 km/h, dying out this afternoon.
Wind at 2000 metres: Southerly 50 km/h, easing to southwesterly 30 km/h this morning.
Wind at 3000 metres: Southerly 30 km/h, rising to southwesterly 50 km/h at night.
Freezing level: 1800 metres, lifting to 2500 metres this morning.
Sliding Danger
Rain has fallen to 1900m creating a very slick frozen snow surface which with cold temperatures will present a sliding hazard all day. Take care. An ice axe and crampons could be necessary.
Forecast Confidence
High
- The snowpack structure is well understood.
- We have a good understanding of the snowpack structure and confidence in the weather forecast.
New Zealand Avalanche Advisory (NZ Mountain Safety Council)