Avalanche forecast

Two Thumbs

New Zealand Avalanche Advisory
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Avalanche danger

High Alpine · above 1,800 m
1 · Low
Alpine · 1,200 m–1,800 m
1 · Low
Sub Alpine · below 1,200 m
1 · Low
Out of date — this forecast expired last month. You’re viewing past conditions, not the current bulletin.

Highlights

The snowpack in the Two Thumb Range should stay stable as it misses out on the snow and rain closer to the divide.

Keep an eye on the actual amount of precipitation on Thursday. The hazard will increase quickly if it is heavier than forecast.

Be prepared for a widespread sliding hazard with lots of rocks in the runouts.

Avalanche problems

  • Wind Slabs

    • All elevations
    Likelihood
    Unlikely
    Size
    1

    Windslabs are unlikely unless more snow spills over to the forecast area than is forecast. Keep an eye on the amount of precipitation and be prepared to back off steep terrain if significant loading happens.Even a small avalanche may be consequential with rocks or cliffs in the runout.

Recent Avalanche Activity

No recent avalanches have been reported.

If you see any activity on the Two Thumb Range, please make a public observation. It really helps us to produce accurate forecasts.

Current Snowpack Conditions

Previous gale force wind from the northwest and southwest has left old crusts and rock exposed on ridges and upper elevations.

Deeper snow and good "spring" skiing has been reported at mid and lower elevations on northern slopes.

A widespread rain crust below about 2200m has undergone several melt freeze cycles on sunny slopes

Snow depths in the south are about 70cm, tapering to about about 50cm mid range and 40cm in the north.

The snowpack north of Stag Saddle is not well understood, with no direct observations.

Mountain Weather

Mostly cloudy.

Wind at 1000 metres

Northwesterly 40 km/h rising to severe gale 90 km/h in the afternoon. Easing to gale 70 km/h at night.

Wind at 2000 metres

Northeasterly 40 km/h rising to gale 70 km/h in the morning, then severe gale 100 km/h in the afternoon.

Freezing level

1800 metres.

Sliding Danger

The wind has stripped the soft snow back to exposed crusts.

Below 2000m, the snowpack has gone through melt freeze cycles, so any overnight freeze will form a slick crust.

Expect high sliding danger with lots of rocks in the runouts.

Iceaxe and crampons are highly recommended.

Forecast Confidence

Moderate

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.
  • We are uncertain about forecast precipitation amounts.

New Zealand Avalanche Advisory (NZ Mountain Safety Council)

Regions covered