Wind Slabs
- Tutte le quote
- Probabilità
- Possible
- Dimensione
- 2
Look out for small pockets of wind slab. This is most likely near ridgetop lee to the westerly, and also on the downwind side of terrain features.
Bollettino valanghe
Vedi sulla mappaFiordland
New Zealand Avalanche Advisory
Pericolo valanghe
- High Alpine · above 1,800 m
- 2 · Moderato
- Alpine · 1,200 m–1,800 m
- 1 · Debole
- Sub Alpine · below 1,200 m
- 1 · Debole
Non aggiornato — questo bollettino è scaduto 4 weeks ago. Stai vedendo condizioni passate, non il bollettino in corso.
In sintesi
Northern Fiordland should see around 10cm snow above 1650m on Wednesday as a front approaches from the west.
The windslab and loose dry avalanche hazard is expected to rise after a period of fine weather.
Please submit any observations you make. They are most appreciated.
Problemi valanghivi
Loose Dry
- Tutte le quote
- Probabilità
- Possible
- Dimensione
- 1
A chance of loose dry avalanching (sluffing) out of steep terrain might still be possible at the upper elevations. Take note of what is happening above you.
Recent Avalanche Activity
Please see the public observations for some photos from the Darran's on Sunday. Cold dry snow, very wind affected. Some cliff band activity observed. Isolated cracking seen when skinning on wind loaded areas in Homer area.
Observations from Milford Track area, Darran's and Routeburn on 20 July -Slick frozen conditions below 17/1800m. Only the highest peaks (North Peak, Talbot, Mt Christina) had some slopes with enough snow to cover terrain features and look wind loaded.
Current Snowpack Conditions
Mon 27th July-Currently the snowpack is starting to become more stable, as temperatures rise after 3 days of very cold temps. In Northern Fiordland an estimated 50cm cm fell from the South to SW above about 1700m between Wed 22nd and Fri 24th July, with rain below this for most of the storm. Temperatures dropped at the end of the storm and snow fell to 600m.
Prior to July 24th the snowpack was very shallow, with most slopes below 1700m being below threshold (not enough snow to avalanche). Only slopes at the highest elevations had a layered pack.
Mon 21st July - Below around 1800m the thin snowpack had a mixture of rain and snow over the week of 13th to 18th July, culminating in rain up to about 1750m on Saturday the 18th. This snowpack is generally thin, with much of it still below avalanche threshold, and rainsoaked and refrozen. Above about 1800m there has been about 80 or 90 cm fall in northern Fiordland and about 60cm in the south, from a series of westerly fronts over the week of 13th to 18th July. There were warm temperatures on Saturday 18th and this snowpack is now thought to be stable, with possible remaining wind slab at the high elevation areas lee to the west but should be treated cautiously as there have been not observers in the field.
Mountain Weather
A front approaches over Wed, expect around 10cm snow down to 1650 over Wednesday.
Sliding Danger
Surface conditions are variable, with wind scouring on windward slopes. Take an axe and crampons if you're exploring.
Forecast Confidence
Moderate
- We are uncertain due to a limited number of field observations.
- We are uncertain due to a highly variable snowpack.
New Zealand Avalanche Advisory (NZ Mountain Safety Council)