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Avalanche Forecast

Archived

Jan 9th, 2025–Jan 10th, 2025

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

Coquihalla, Harrison-Fraser, Manning.

Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Confidence

Moderate

Avalanche Summary

No new avalanches have been observed in the past few days. Conditions will change on Friday as new snow and wind form fresh, reactive slabs.

The most notable activity in the past week has been large glide slab avalanches. Glide slabs are hard to forecast. If you see a glide crack, simply avoid being under it.

Snowpack Summary

Up to 10 cm of new snow overlies a thin surface crust everywhere except northerly slopes in the alpine.

A substantial crust up to 30 cm thick sits 50 to 90 cm deep, well-bonded to surrounding snow. The mid and lower snowpack is generally well consolidated, with several well-bonded crusts scattered throughout.

Treeline snow depths range from roughly 150 to 220 cm around the Coquihalla and 100 to 150 cm around Manning Park.

Weather Summary

Thursday Night

Increasing cloud cover. 40 to 80 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level drops to 1200 m.

Friday

Cloudy with up to 10 cm of new snow. 20 to 60 km/h west ridgetop wind. Treeline temperature -5 °C.

Saturday

A mix of sun and cloud with isolated flurries. 15 to 40 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Sunday

A mix of sun and cloud with isolated flurries. 15 to 40 km/h northwest ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded terrain features.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.

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.