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Avalanche Forecast

Archived

Jan 7th, 2024–Jan 8th, 2024

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

Regions

Glacier.

Great turns are found in sheltered areas, but be sure to have a dig to investigate how the storm snow is bonding. Human triggering remains possible.

The days are short, leave enough time at the end of the day in case of an emergency. We have seen a barrage of calls come in, leaving little or no time for an efficient response before darkness.

Confidence

Moderate

Avalanche Summary

Third-hand report of a skier-triggered avalanche in The Ravens area on Sunday, size 2 storm slab. All people were accounted for, but no other information was available. Please post a MIN report when these types of incidents occur.

A natural avalanche cycle occurred Friday into Saturday with results ranging from size 2 up to 3.5. The majority of activity was on the East side of the Park off Mt. Tupper and MacDonald.

Snowpack Summary

20-40cms of storm snow with moderate to strong winds has created a storm slab in the alpine and exposed areas at treeline. This new snow sits on sun crust on solar aspects; firm wind effect in the alpine; and soft facetted snow on sheltered N aspects.

Below 2100m there is a crust down 50-60cm (from Dec 5th/6th).

The Dec 1 surface hoar (decomposing) is down 60-100cm and has seen isolated deep pockets "pop" out in steeper, alpine terrain.

Record low snowpack for the Park.

Weather Summary

The powder piggies have been filling their bellies in the 'deep' snow trenches after the recent snowfall.

Monday will be cloudy with sunny periods and isolated flurries. Ridgetop winds will be 20-35km/hr from the SW. Alpine temps could reach a high of -12.

Another Pacific pulse of snow arrives Tuesday morning, 10-15cm.

Temps drop Wednesday night down to -25 and remain cold until a gradual rewarming on Saturday.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • If triggered, storm slabs in-motion may step down to deeper layers and result in very large avalanches.
  • Be carefull with sluffing in steep terrain, especially above cliffs and terrain traps.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.