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Avalanche Forecast

Archived

Dec 31st, 2024–Jan 1st, 2025

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

Regions

Glacier.

An increase in wind transported snow over the past 24h has created new wind slabs in the alpine.

Loose dry avalanche activity has tapered off but sluff management is still required in steep terrain.

Confidence

Moderate

Avalanche Summary

Limited visibility on Tuesday making it difficult to accurately report natural activity.

Small loose dry avalanches up to size one reported by public in steep terrain on Monday.

Snowpack Summary

Over 70cm of new snow has fallen over the past week. This new snow arrived with periods of moderate wind which created pockets of soft slabs in wind prone areas.

Overall, the snowpack is strong with a well consolidated mid-pack. A notable layer is down 90-120cm. This interface has been dormant for weeks, but consists of surface hoar in sheltered locations, and a sun crust on solar aspects. The snowpack's base is comprised of several early-season rain crusts.

Weather Summary

Cloudy Skies & flurries for the next few days.

Tonight Cloudy with isolated flurries. Trace precipitation. Ridge wind SW 15 km/h. Freezing level (FZL) at valley bottom.

Wed Mainly cloudy with isolated flurries. Trace precipitation. Alpine high -9 °C. Wind W 10-25. FZL 800m

Thurs Mainly cloudy with isolated flurries. Trace precip. Wind SW 10-25. FZL 700m.

Fri Sunny periods. No precipitation. Wind SE 15. FZL 600m.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind-affected terrain.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Use appropriate sluff management techniques.

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.