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Avalanche Forecast

Mar 1st, 2025–Mar 2nd, 2025
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Coquihalla, Harrison-Fraser, Manning, Skagit.

Although cooling temperatures should have a stabilizing effect on the snowpack, uncertainty around buried weak layers is best managed through conservative terrain choices.

Confidence

Moderate

Avalanche Summary

Recent avalanche activity has been mostly loose wet out of steep solar aspects, size 1-2. On Friday, several wind slab avalanches to size 1.5 were observed, at least one was triggered by a cornice failure.

Evidence of natural avalanches from the past weekend's storm may still be visible. Numerous very large (size 3.5 to 4) persistent slabs with impressive crowns (100 to 200 cm) have been observed in the Manning region.

Snowpack Summary

A widespread surface crust exists on most, if not all aspects and elevations. Below 1300 m, the snowpack is isothermal and disappearing quickly.

A weak layer of facets and/or surface hoar is buried 50 to 120 cm deep. Large avalanches ran on this layer last weekend and it continued to give easy results in snowpack tests during the week.

A crust from December, buried 1 to 2 m deep, has been observed to be breaking down.

Weather Summary

Saturday night

Increasing cloud. 10 to 20 km/h south ridgetop wind. Treeline temperature +3°C. Freezing level dropping to 2000 m.

Sunday

Mostly cloudy with a trace of snow. 10 to 20 km/h northwest ridgetop wind. Treeline temperature 0°C. Freezing level 1700 m.

Monday

Sunny. 10 to 20 km/h northeast ridgetop wind. Treeline temperature 0°C. Freezing level 1700 m.

Tuesday

A mix of sun and cloud. 20 to 30 km/h south ridgetop wind. Treeline temperature 0°C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
  • In times of uncertainty, conservative terrain choices are our best defense.

Avalanche Problems

Persistent Slabs

Large avalanches were observed on a buried weak layes during the storm last weekend. This layer continues to give easy results in snowpack tests and may remain triggerable by riders.

Aspects: North, North East, East, West, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Wind Slabs

Wind slabs may remain sensitive to rider triggers in lee terrain features, especially at higher elevations. Small wind slab releases may step down to weak layers in the upper snowpack to produce larger, more destructive avalanches.

Aspects: North, North East, East, West, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2