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Avalanche Forecast

Archived

Apr 4th, 2023–Apr 5th, 2023

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

Regions

Chic-Choc Mountains, Littoral, Murdochville.

Watch for signs of instability before committing to high consequence terrain. Wind slabs can be found in isolated areas on several aspects.

Confidence

Moderate

Avalanche Summary

At time of publication, no new avalanches had been observed or reported.

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

In general, at all elevations, 15 to 35 cm of snow are covering the March 26 melt freeze crust. Sunshine has affected the surface of the slopes on the solar aspects, but cold temperatures have kept the snow lighter on the northern aspects.

In the alpine and treeline, strong winds have redistributed these accumulations, forming an interface of soft and hard slabs that are upside down in some places.

The middle of the snowpack is well consolidated, and of increasing density, interspersed with several melt freeze crusts from the last few weeks.

Weather Summary

Forecast for the Chic-Chocs ridges and summits.

Synopsis: The low-pressure system that will bring a few centimetres Tuesday night will fade Wednesday morning and should bring back some sun.

Tuesday night and overnight: Cloudy. 2 to 3 cm of snow. Winds from 45 to 50 km/h from the northwest. Min -10C. Freezing level at valley bottom.

Wednesday: Mostly sunny. No precipitation. Winds from 15 to 20 km/h from the north, northwest. Max. -10C. Freezing level at valley bottom.

Thursday: Cloudy. Mix of freezing rain and snow. Winds from 45 to 50 km/h from the south. Temperature inversion, -6C down in the valley and +4C on the summits.

Friday: Cloudy. 1 to 2 cm of snow. Wind 45 to 50 km/h from the west. -8C.

For more details, see the Chic-Chocs alpine forecast.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Caution around convexities or sharp changes in terrain.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Make observations and assess conditions continually as you travel.

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.