Bollettino valanghe

Tongariro

New Zealand Avalanche Advisory
Vedi sulla mappa

Pericolo valanghe

High Alpine · above 2,300 m
3 · Marcato
Alpine · 1,800 m–2,300 m
2 · Moderato
Sub Alpine · below 1,800 m
1 · Debole
Open full map
Non aggiornato — questo bollettino è scaduto 2 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Wind slab will develop as an incoming storm affects the region over the next 24 hours. This hazard will form on North and west-facing slopes. Poor visibility and weather conditions will make backcountry travel challenging. Recommend delaying any backcountry travel until conditions improve. Expect blizzard conditions tonight and continuing for the next 24 hours.

Problemi valanghivi

  • Wind Slabs

    • Tutte le quote
    Probabilità
    Likely
    Dimensione
    2.5

    Wind slabs are likely to develop above 1700 metres over the next 24 hours. Start zones will continue to load, increasing sensitivity and size of deposits. Triggering by natural events such as rock and icefall is likely. The existing anchors will progressively be buried, increasing the reactivity of these wind slab deposits. Weaknesses will form within the new snow and at the interface between new snow and old snow. It is advisable to avoid any newly formed slabs that have a convex shape and lack proper support. Triggering these slabs with light loads, such as the weight of a single person, is likely.

Recent Avalanche Activity

No natural or human-triggered avalanche activity has been observed or reported over the past 24 hours.

Current Snowpack Conditions

Currently, the snowpack is being affected by light rain at lower elevations, with snowfall higher up (mid-afternoon of the 7th). The new snow is immediately being transported to the north and west aspects. The forecast is for continued snowfall, which will increase the amount of material available for transport. Wind slabs will continue to form over the next 24 hours. Older wind slabs currently exist on southern aspects, which are gaining strength. The current threshold is sitting at 2100 meters. We anticipate this to be lower with the incoming storm system.

Mountain Weather

Tomorrow, the 9th of July, rain, possibly heavy in the morning, then easing in the afternoon. Snow lowering to 900 metres in the morning. Southeasterly gale rising to severe gale early morning, then easing to southerly gale in the evening. Over the next 24 hours, the freezing level will lower from 1800 metres to 1300 metres. A deep low northeast of New Zealand moves slowly east today, bringing strong southeast flow over central New Zealand, while a cold front reaches the lower South Island. Tomorrow, a ridge builds over the South Island, while the strong southeast flow over central and northern New Zealand starts to ease.

Sliding Danger

Forecasted gale-force winds will strip exposed slopes. These exposed slopes will be hard and icy; terrain travel will require good technique and proper equipment.

Forecast Confidence

Moderate

  • We are confident the likelihood of avalanches will increase with the forecast weather.
  • We are uncertain due to a limited number of field observations.

New Zealand Avalanche Advisory (NZ Mountain Safety Council)

Regioni coperte