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Avalanche Forecast

Archived

Dec 29th, 2023–Dec 30th, 2023

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

High freezing levels with intense solar could push us into Considerable hazard, pay attention to the temperature!

Please don't get complacent on your search for fresh tracks. The persistent slab problem is worth considering when pushing into bigger objectives.

Confidence

Moderate

Avalanche Summary

A team triggered several explosive controlled avalanches in steep north facing terrain at treeline on Wed. Avalanches were small and triggered soft wind slabs up to 40cm deep.

No new natural avalanches have been observed since Dec 23rd.

A human-triggered avalanche occurred on Video peak Saturday afternoon involving a group of 3, no injuries reported.

Recently significant human-triggered avalanches failing on the Dec 1st surface hoar layer: Balu Pk & Ursus Minor.

Weather Summary

Saturday will be a warm day, freezing levels will extend up to 2500m! The ridge of high pressure breaks down Saturday and abit of snow is on the way

Tonight: Clear periods. Alp Low 3 °C. Winds S 15-30km/hr.

Sat: A mix of sun & cloud with wet flurries. High 4°C. (fzl) 2500m. Winds: SW 13-35.

Sun: Cloudy with Flurries. Light snow, High -3°C. Fzl 1700m. Light W winds.

Mon: Cloudy. High -7 °C. Freezing level: 1100m. Light S wind.

Terrain and Travel Advice

  • Avoid steep slopes when air temperatures are warm, or solar radiation is strong.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Avoid convexities, steep unsupported terrain and rocky outcroppings.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.