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Avalanche Forecast

Archived

Apr 17th, 2025–Apr 18th, 2025

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

Regions

Chic-Choc Mountains.

The weather conditions - new snow, winds and rising temperatures - are combined to reduce the stability of the snowpack. It seems that winter conditions are still present in alpine terrain. Evaluate the slopes carefully before setting off.

Confidence

Moderate

Avalanche Summary

No new avalanches observed or reported.

If you're out and about in the backcountry, please share your observations on the RIM ( Réseau d'Information en Montagne ).

Snowpack Summary

Up to 40 cm of fresh snow (moist below 600 m) lies on a widespread refreezing crust. The upper part of the snowpack, up to 90 cm deep, is moist. The middle of the snowpack consists of alternating well-consolidated snow and refreezing crusts.

There is considerable spatial variability in the alpine zone and at the treeline (presence of rocks, ice, blown snow). At mid-mountain, snowpack thickness varies from 80 to 200 cm.

Weather Summary

WEATHER FOR CHIC-CHOCS PEAKS AND SUMMITS

A sunny day in the mountains on Friday before the arrival of another low-pressure system.

Thursday evening and night: Cloudy. Northwest winds, 45 to 60 km/h. Low -6. Freezing level to valley bottom.

Friday: Clearing in the morning. Wind northwest, 20 to 40 km/h. Maximum +2. Freezing level at 900m.

Saturday: Rain, 5 to 10 mm. Wind southwest, 20 to 40 km/h. High +5. Freezing level at 2800m.

Sunday: Snow. Accumulation 25 to 35 cm. Wind northwest, 60 to 90 km/h. Maximum 0. Freezing level at 600m.

For more details, consult the Chic-Chocs alpine weather forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Carefully evaluate steep lines for wind slabs.

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.

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.