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Avalanche Forecast

Archived

Dec 4th, 2021–Dec 5th, 2021

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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Cariboos.

Continually assess the wind effect as you move through the terrain. Variability in wind speed and direction has created unusual loading patterns. 

Confidence

Moderate -

Weather Forecast

Saturday night: some light flurries accumulating up too 5cm of new snow with moderate Northwest winds. Low of -14 at 1500m.

Sunday: high of -11 at 1500m, light to moderate Northwest winds in the alpine. No snow expected. 

Monday: high of -15 at 1500m with no new snow expected. Alpine winds will be moderate from the Northwest.

Tuesday: high of -10 at 1500m with some light flurries. Winds changing to strong from the Southwest.

Avalanche Summary

On Thursday 2 size 3 avalanches were reported in the Southern part of the range. One was a natural on a South aspect and the other a natural cornice triggered on a North aspect. Both avalanches ran on the November 4th crust/facet layer which can be found down 180cm in this area.

Snowpack Summary

Wind slab exists on all aspects in the alpine and treeline.

The early December crust exists below 1800m on all aspects and has as much as 25cm of low density snow above it.

The November 4 facet/crust combo can be found in the alpine down 150 to 250cm. Snowpack depths in the alpine are between 200cm and 300cm.

For an indepth look into the recent weather, current snowpack and our thoughts for the future visit the Forecasters Blog.

Terrain and Travel

  • Be careful as you transition into wind affected terrain.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

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.