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Avalanche Forecast

Archived

Mar 20th, 2024–Mar 22nd, 2024

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

Regions

Chic-Choc Mountains.

👉 ATTENTION - BULLETIN VALID FOR MARCH 21th AND 22th 👈

The expected storm will quickly increase the avalanche danger. A storm slab problem can be expected to develop gradually on Thursday and to persist on Friday.

Conservative route choices are advised.

Confidence

Low

Avalanche Summary

No new avalanches observed or reported.

If you head into the backcountry, thanks for sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

Before the storm, between 5 and 15 cm of new snow had fallen at altitudes above 600 m. The snow remained light on the polar slopes. This snow covers a refreezing crust that formed last week with the warm temperatures and solar heating.

The average height of the snow cover is around 100 cm, but is highly variable from one area to another. The wind has greatly redistributed the snow in the alpine region, creating great spatial variability.

Weather Summary

Synopsis: A low-pressure system from the Great Lakes brings heavy precipitation and wind to the Chic-Chocs.

Thursday evening and night: Traces of snow. Southeast wind, 30 to 50 km/h. Minimum -4.

Thursday: Snow. 15 to 20 cm. Wind east, 50 to 70 km/h. Maximum -4. Freezing level at 400 m.

Friday: Snow 10-15 cm. Wind northwest, 40-50 km/h. High -13.

Saturday: Alternating sun and clouds. Wind southwest, 20 to 40 km/h. Maximum -10.

For more details, check out the most recent alpine weather forecast.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • As the storm slab problem gets trickier, the easy solution is to choose more conservative terrain.
  • Storm snow and wind is forming touchy slabs. Use caution in lee areas in the alpine and treeline.

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.