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Avalanche Forecast

Archived

Dec 25th, 2023–Dec 26th, 2023

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

Regions

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

If the new snowfall surpasses 30 cm, the danger level in the alpine and at treeline is deemed considerable.

Travel carefully at lower elevation due to low snowpack conditions.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported before 4pm on Monday.

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

Snowpack Summary

New snowfall and strong south winds are expected to build new wind slab. Past storm snow depths from 10 to 20 cm has bonded well to old 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

Monday Night

Partly cloudy. Snow and some rain expected 5 to 20 cm. Treeline temperature around -1 °C. Freezing level around 1500 to 1900 m. Moderate to strong south ridgetop wind.

Tuesday

Partly cloudy. Snow expected 1 to 5 cm. Treeline temperature around 0 °C. Freezing level around 1200 m. Strong south ridgetop wind.

Wednesday

A mix of sun and cloud, becoming cloudy. Snow is expected 1 to 5 cm. Freezing level 1500 m. Treeline temperature around 0 °C. Moderate, south ridgetop wind.

Thursday

Cloudy. Snow is expected 1 to 5 cm. 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.