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Avalanche Forecast

Archived

Feb 25th, 2023–Feb 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.
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, Littoral, Murdochville.

With the cold weather keeping the instabilities a little longer than usual, let's give the new wind slabs time to stabilize.

Confidence

High

Avalanche Summary

No new avalanche has been observed or reported recently.

Thanks for contributing to the collection of this valuable data by sharing with other users on the Mountain Information Network or by writing to us directly at [email protected].

Snowpack Summary

Around the summits, the wind has redistributed the available snow, exposing the January 18 crust or ice and creating a superposition of wind slabs of varying density, often very firm in alpine start zones. The January 18 crust is buried up to 120 cm of snow in leeward areas.

The best snow conditions are in areas protected from the wind, above 600m, where the snow has been preserved from the weather events of the last few weeks (thaw and wind).

In general, the height of the snow cover varies from 70 to 90 cm in the valley to 100 to 150 cm in the middle mountains.

Weather Summary

Forecast for the Chic-Chocs ridges and summits.

Synopsis: Two high pressure systems will pass over the region in the next few days.

Saturday evening and night: A few clouds. Wind west 10 to 20 km/h. Low -25 C.

Sunday: Mix of sun and clouds. Wind 10 to 20 km/h from the southwest. High -16 C.

Monday: Sunny. Wind northwest 10 to 20 kph. High -16 C.

Tuesday: Sunny. Wind southwest 20 to 30 km/h. High -12 C.For more details, see the Chic-Chocs alpine forecast.

Terrain and Travel Advice

  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for wind slab hazard before you commit to it.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.