Avalanche Forecast

Issued: Jan 20th, 2024 4:00PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is moderate. Known problems include Storm Slabs and Persistent Slabs.

Avalanche Canada MM, Avalanche Canada


Warming temps, new snow and wind are the perfect recipe for fresh slab formation.

Continue to re-evaluate conditions as you gain elevation and transition into open terrain.




Avalanche Summary

A few naturals were observed on Mt. Macdonald running from steep terrain on Saturday.

Thursday; there was a close call when a skier triggered a sz 1.5 avalanche on the S/SW side of Cheops and self arrested; and a skier triggered slab avalanche on a S facing moraine.

Wednesday there was a widespread natural cycle in the highway corridor, triggered by wind.

Tuesday, there was a skier triggered avalanche on the W Side of Cheops.

*All skier triggered avalanches failed on a suncrust

Snowpack Summary

30cms of recent storm snow overlies variable wind slabs/wind effect in open terrain, and settling facetted snow in sheltered areas below tree-line.

A sun crust, down 50cm (most prominent at tree-line) has been the failure plane for isolated & large skier triggered avalanches recently.

Below 2100m there is decomposing crust down 75cm (from Dec 5th/6th).

The Dec 1 surface hoar layer is down 110cm and is decomposing.

Weather Summary

Expect a temperature inversion and flurries into Monday as heavy cold air is slowly pushed out.

Tonight: Trace precip. Low -3°C. Light Southwest ridgetop wind. Freezing level (Fzl) 1400m

Sun: Isolated flurries. High -3°C. Fzl 1800m. Light to Moderate SW wind.

Mon: Isolated flurries. High -2°C. Fzl 1800m. Light SW wind.

Tues: 5cm. Low -6°C, High -3°C. Light S wind. Fzl 1700m

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.


Storm Slabs

An icon showing Storm Slabs

Fresh snow with variable wind continues to build fresh slabs.

Aspects: All aspects.

Elevations: All elevations.



Expected Size

1 - 2.5

Persistent Slabs

An icon showing Persistent Slabs

Be extra cautious on South through West aspects, as there is a sun-crust down 40-70cm that has been reactive to skier/rider traffic.

Aspects: South East, South, South West, West.

Elevations: Alpine, Treeline.



Expected Size

1.5 - 3

Valid until: Jan 21st, 2024 4:00PM