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Avalanche Forecast

Archived

Apr 9th, 2023–Apr 10th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Chic-Choc Mountains, Littoral, Murdochville.

The warm temperatures expected on Monday, along with the presence of a strong spring sun, could destabilize the surface snow and create a problem of wet snow avalanches. This problem will increase as the day warms up. Be especially careful on steep slopes exposed to afternoon sunlight.

Confidence

Moderate

Avalanche Summary

No new avalanches have 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 the Alpine, the western and windward slopes were swept to the crust. In the last few days, the eastern and leeward slopes have been able to accumulate 5 to 10 cm of new snow, and 15 to 50 cm thick wind slabs have formed on the upper alpine slopes.

At treeline and below treeline, a brittle surface crust that cannot support the weight of a skier or snowboarder covers the 15 to 35 cm of snow above the March 26 crust. The surface crust is more solid on the solar aspects, where the snow has been more affected by radiation.

The middle and the base 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 presence of a ridge of high pressure brings sunny and warm weather for Monday. Liquid precipitation is expected on Tuesday. Sunday night and overnight: Partly cloudy. Wind northwest, 30 to 50 km/h. Low -4. Monday: Sunny. Wind west, 25 to 45 km/h. High +6 C. Freezing at 2000 m.Tuesday: Showers. Wind west 30 to 50 km/h. High +3. Freezing level at 1000 m.Wednesday: Rain changing to snow. Wind north 40 to 60 km/h. Maximum 0. Maximum 0. Freezing level at 850m.

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

Terrain and Travel Advice

  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.
  • Watch for unstable snow on specific terrain features, especially when the snow is moist or wet.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Approach lee and cross-loaded slopes with caution.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.