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Avalanche Forecast

Archived

Dec 24th, 2023–Dec 25th, 2023

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
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, Skagit.

Anticipate variable snow conditions and travel carefully due to early season hazards.

Confidence

No Rating

Avalanche Summary

No new avalanches were reported before 4pm on Sunday.

Small, naturally triggered wet loose avalanches were observed in steep, rocky terrain on Wednesday.

If you do head into the backcountry please consider submitting observations and/or photos on the Mountain Information Network.

Snowpack Summary

The past storm brought a variety of snow depths from 10 to 20 cm arriving warm and departing cold. The new snow is likely to have adhered well to the warm surfaces. Avalanches are anticipated primarily in upper treeline locations where strong southwest winds have built up deeper layers of snow over existing, smooth, and firm surfaces. Below the treeline, expect to encounter dirt or shallow, dense, moist, or wet snow.

The mid and lower snowpack is made up of a series of crusts and rounded grains. The snowpack is generally well consolidated.

Overall, the snow depth remains shallow, especially on south facing slopes. Early season hazards are just below the surface.

Weather Summary

Sunday Night

Mostly clear. A trace of new snow expected. Treeline temperature around -1 °C. Freezing level rising to 1200 m, Strong south ridgetop wind.

Monday

Partly cloudy. 5 to 10 cm of new snow expected. Treeline temperature around -1 °C. Freezing level around 1200 to 1500 m. Moderate to strong south ridgetop wind.

Tuesday

Partly cloudy. 5 to 10 cm of new snow expected. Treeline temperature around 0 °C. Freezing level around 1200 m. Strong south ridgetop wind.

Wednesday

Cloudy. A trace of snow is expected. Freezing level 1500 m. Treeline temperature around 0 °C. Moderate, south ridgetop wind.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Even a small avalanche can be harmful if it pushes you into an obstacle or a terrain trap.
  • Travelling on skis is hazardous due to a very shallow mountain snowpack.

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.