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Avalanche Forecast

Archived

Dec 19th, 2022–Dec 20th, 2022

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.
Below Treeline
Natural avalanches unlikely.

Regions

Chic-Choc Mountains.

The forecasted "storm" has one last chance to improve our conditions on Monday night and Tuesday.

As the forecaster is an optimist, the danger rating remains moderate for Tuesday. Hopefully, Mother Nature will respect her promises...

Getting out on the mountain? We need your observations! https://www.avalanche.ca/mountain-information-network

Confidence

Moderate

Avalanche Summary

No new avalanche activity has been observed or reported. Please share your observations at [email protected], or with the Mountain Information Network.

Snowpack Summary

The snow on the ground observed on Monday was significantly less than expected... between 2 and 4 cm of new snow fell between Sunday and Monday evening. But let's be hopeful, an additional 5 to 10 cm are possible by Tuesday, probably more in the eastern part of our forecast area like the Madeleine mines. Leeward, this new snow will cover the 15 to 30 cm of wind-affected snow accumulated on the December 8 crust. In some areas where loading was heavier prior to this storm, up to 100 cm of snow accumulated on this crust. The average snowpack height is about 45 to 65 cm at mid-mountain. The strong to extreme northeasterly winds of the last few weather systems have already greatly redistributed the snow, exposing the rock or crust on the windward slopes and this trend will continue with this low.Despite the fresh snow, snow conditions will remain minimal. Remember that crust and obstacles such as rocks, stumps, trees and trunks can still be found barely buried under this beautiful white carpet.Translated with DeepL

Weather Summary

Forecast for the Chic-Chocs ridges and summits.

A low pressure system is still quasi-stationary over the Maritimes and will bring snow to the Chic-Chocs. Areas northeast of Highway 299 could be favored by precipitation. Monday evening and night: Snow 5 to 10 cm, possibly more at the Madeleine mines. Wind northeast 50 to 60 km/h. Low -6. Tuesday: Intermittent snow, 2 to 4 cm. Wind northeast 30 to 50 km/h. High -4Wednesday: Cloudy. Wind south 10-20 km/h. High -4.Thursday: Clearing in the afternoon. Wind northwest 20 to 40 kph. High -7. For more details, check out the Chic-Chocs alpine weather forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Wind slabs may be poorly bonded to the underlying crust.

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.