Boletín de aludes

Craigieburn Range

New Zealand Avalanche Advisory
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Peligro de aludes

High Alpine · above 1,800 m
2 · Moderado
Alpine · 1,200 m–1,800 m
2 · Moderado
Sub Alpine · below 1,200 m
1 · Débil
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Desactualizado: este boletín caducó 4 days ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

A windy storm is here for the weekend.

Rain on snow quickly increases the Loose Wet hazard.

Problemas de aludes

  • Wind Slabs

    • Todas las altitudes
    Probabilidad
    Unlikely
    Tamaño
    1.5

    Wind Slabs are more dense and contain smaller snow particles due to being tossed around and beaten up by the wind. These Wind Slabs will be found mostly on Southeastern1/2 aspects. The stronger the wind, expect to find Wind Slabs lower down the slope from the ridge and in very sheltered zones. Cornices indicate wind direction and could possibly grow quite large with the forecast weather. Watch for denser, hollow sounding pockets of freshly deposited snow on steep slopes above 30 degrees.

  • Wet Slabs

    • Todas las altitudes
    Probabilidad
    Unlikely
    Tamaño
    1.5

    Any unreactive slabs lingering in the snowpack could be triggered by the sudden onset of rain. Rapid overloading of the weaker structure around could increase the likelihood of Wet Slabs in untracked terrain on most aspects at elevations above 1600m.

  • Loose Wet

    • Todas las altitudes
    Probabilidad
    Possible
    Tamaño
    1.5

    An elevated freezing level and possible rain will react quickly causing roller-balling first then possible Loose Wet avalanches, on all aspects and elevations. Be aware of this hazard if traveling uphill in these areas.

Recent Avalanche Activity

Nil in the past 24hrs.

Current Snowpack Conditions

Snow coverage across the forecast area is super variable. Up to 150cm in some areas down to rime covered rocks. Warm temperatures will have settled the upper pack somewhat, almost creating a spring like snowpack leaving a firm surface after overnight freezes. Around 10cm of cold dry snow fell on the 15th and 16th August. This fell onto a very firm surface. Moderate Southerly wind pushed a lot of this snow onto North and Western aspects. Soft cornices were observed on Western aspects above Tarn Basin 16/08. Cold temperatures are creating a weaker layer underneath this new snow however this is not widespread in the forecast region. This is a layer to monitor over time to see which way it will go.

Mountain Weather

Saturday: Rain about the Main Divide, heavy at times, with snow lowering to 2000m in the morning. Partly cloudy elsewhere, with patchier and lighter rain developing in the afternoon. Gale Northwest winds. Freezing level 2400m.

Sunday: Showers, some heavy with snow to 1200m, becoming isolated in the morning but remaining cloudy. Severe Gale Northwest winds turning Westerly and easing in the morning. Freezing level 1900m lowering to 1200m in the morning.

Sliding Danger

Ice axe and crampons are highly recommended. Ski Crampons will be required if adventuring on skis or snowboard.

Forecast Confidence

Low

  • We are confident the likelihood of avalanches will increase with the forecast weather.
  • We are uncertain if precipitation will fall as rain or snow.
  • We are uncertain due to how buried persistent weak layers will react with the forecast weather.

New Zealand Avalanche Advisory (NZ Mountain Safety Council)

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