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Avalanche Forecast

Archived

Feb 19th, 2024–Feb 20th, 2024

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Chic-Choc Mountains.

Even if the rating is low, it doesn't guarantee absence of avalanche danger. Unstable wind slabs might persist in isolated spots, possibly sitting atop a crust ideal for sliding.

Be vigilant for indications of recent loading.

Confidence

High

Avalanche Summary

No new avalanches reported or observed.

If you go into the backcountry, thanks for sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

Snowpack height is highly variable across the zone, and wind effects are strong in the alpine and at the treeline.

In areas sheltered from the wind, you can find between 10 and 20 cm of very low density snow. Sectors closer to the north coast were favoured.

Below 500m altitude, this new snow rests on a refreezing crust that had formed on Monday. The crust thickens and hardens as we lose altitude. On sunny slopes, the crust is present up to 1000m. On sunny alpine slopes, the crust is very firm, and ski crampons are essential. A thin layer of facetted grains is developing on this crust.

The middle of the snowpack is well consolidated, resting on the December 30 combo of facetted grains and crust. Facetted grains and depth hoar are developing at the base of the snowpack.

The average height is around 100 cm.

Weather Summary

Synopsis: The cold, rather dry weather continues until Wednesday, when we'll be treated to milder temperatures in the mountains.

Monday evening and night: Partly cloudy. Wind northwest 20-40 km/h. Low -22.

Tuesday: Mostly sunny. Wind northwest, 25 to 45 km/h. High -20.

Wednesday: Sunny. Wind southwest, 20 to 40 km/h. High -6.

Thursday: Alternating sun and clouds. Wind southwest, 10 to 20 km/h. High -2. Freezing level at 500m.

For more details, check out the most recent alpine weather forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Even a small avalanche can be harmful if it pushes you into an obstacle or a terrain trap.

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.