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Avalanche Forecast

Archived

Jan 6th, 2025–Jan 7th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Sasquatch, Sasquatch, Coquihalla, Harrison-Fraser, Manning, Skagit.

Watch for pockets of wind slab in lee features and around steep rolls.

Surface snow may become moist with warm temperatures.

Confidence

High

Avalanche Summary

Several MINs from the Coquihalla area on Sunday reported wind-affected snow, shooting cracks, and several small skier-triggered wind slabs.

Snowpack Summary

A surface crust may form Monday night after warm temperatures. This is likely on all aspects except northerly aspects in the alpine.

Recent snow has seen moderate redistribution in wind-exposed terrain. Good snow quality has been reported in wind-sheltered areas.

A substantial crust up to 30 cm thick sits 50 to 100 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

Monday Night

Mostly clear skies. 10 to 20 km/h northeast ridgetop wind. Treeline temperature 0 °C. Freezing level 3000 m.

Tuesday

Mostly cloudy. 20 to 30 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2800 m.

Wednesday

A mix of sun and cloud with 1 cm of snow. 10 to 30 km/h southwest wind. Treeline temperature -1 °C. Freezing level 2000 m in the afternoon.

Thursday

A mix of sun and cloud. 10 to 30 km/h southwest wind. Treeline temperature 0 °C. Freezing level 3000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.