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Avalanche Forecast

Archived

Jan 31st, 2022–Feb 1st, 2022

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

Regions

Cariboos.

Recent snow will require some time to bond to the snowpack, particularly where it overlies weak layers.

Confidence

Moderate - Uncertainty is due to how quickly the snowpack will recover and gain strength.

Weather Forecast

MONDAY NIGHT: Cloudy with snowfall, accumulation 5 to 10 cm, 20 to 30 km/h west wind, alpine temperature -14 C.

TUESDAY: Partly cloudy with no precipitation, 20 to 30 km/h north wind, alpine temperature -20 C.

WEDNESDAY: Increasing clouds with afternoon snowfall, accumulation 1 to 3 cm, 20 to 40 km/h southwest wind, alpine temperature -20 C.

THURSDAY: Cloudy with snowfall, accumulation 5 to 15 cm, 30 to 50 km/h west wind, alpine temperature -12 C.

Avalanche Summary

The recent snow was found to be reactive to riders on Sunday below treeline, generally releasing as sluffing in steep terrain. We await observations from higher elevations with lifting clouds.

Looking forward, human-triggering of avalanches may remain elevated, particularly where the recent snow overlies surface hoar.

Snowpack Summary

The weekend's storm brought around 30 to 40 cm of snow, forming new storm slabs. The snow fell with strong wind from variable wind directions, forming wind slabs in lee terrain features. In areas sheltered from the wind, the snow overlies weak surface hoar crystals, which may also sit above a melt-freeze crust on sun-exposed slopes.

The lower snowpack is generally strong and well-bonded.

Terrain and Travel

  • Good day to make conservative terrain choices.
  • Potential for wide propagation exists, fresh slabs may rest on surface hoar, facets and/or crust.
  • Avoid freshly wind loaded terrain features.
  • Make observations and assess conditions continually as you travel.

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.