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Avalanche Forecast

Archived

Apr 19th, 2025–Apr 20th, 2025

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

Regions

Chic-Choc Mountains.

A winter storm will hit the Chic-Chocs this Easter Sunday, with heavy snowfall expected. The danger rating will gradually increase throughout the day.

Confidence

Low

Avalanche Summary

No new avalanches have been observed or reported.

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

Snowpack Summary

The new snow expected on Sunday should accumulate on a refreezing crust, or on wet snow also resting on a refreezing crust. Conditions are highly variable in the alpine and at treeline (rocks, ice, wind-blown snow). The upper part of the snowpack, up to 80 cm deep, is humid. The middle of the snowpack consists of alternating well-consolidated snow and refreezing crusts.

At mid-mountain, the depth of the snowpack varies from 80 to 170 cm.

Weather Summary

WEATHER FOR CHIC-CHOCS PEAKS AND SUMMITS

A low-pressure system from Colorado will bring significant amounts of snow on Sunday.

Saturday evening and night: Rain. Accumulation 10 mm. Westerly winds, 20 to 40 km/h. Low 0. Freezing level going down to 400m.

Sunday: Snow. Accumulation 20 to 30 cm. Wind northwest, 60 to 90 km/h. Maximum -1. Freezing level at 600m.

Monday: Sunny. Wind northwest, 20 to 30 km/h. Maximum 0. Freezing level at 700m.

Tuesday: Intermittent rain. Wind southeast, 30 to 50 km/h. Maximum +1. Freezing level at 900m.

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

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Storm slab size and sensitivity to triggering will likely increase through the day.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.