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Avalanche Forecast

Archived

Dec 24th, 2021–Dec 25th, 2021

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 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

Little Yoho.

If you can brave the cold, there's great skiing to be had in sheltered areas.

Stay warm, eat well. Happy Holidays from Parks Canada.

Weather Forecast

An Arctic air mass moving into the forecast region will bring cold temperatures this week. Day time high temps will be near -20 at valley bottom with the evening lows dropping below -30. Light snow will continue over the weekend with accumulation amount of 5 to 10cm by Monday.

Snowpack Summary

5-30cm over the last 2 days with strong winds have developed wind slabs at treeline and above. There is 50-70cm over the Dec 2 rain crust (exists below 2200m) but has not been observed as active yet. We are monitoring it closely. The lower snowpack is well settled but shallow areas (<100 cm) may still have a DPS issue near the ground.

Avalanche Summary

No new natural avalanche activity reported Friday. Local ski hills continue to see new reactive wind slab forming at ridge crest producing small avalanches in previously controlled terrain. On Thursday we received  reports of reactive wind slabs at treeline and softer, loose dry at lower elevations that were running far and fast.

Confidence

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 Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.