Avalanche Forecast

Issued: Jan 9th, 2024 4:00PM

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

Avalanche Canada lbaker, Avalanche Canada


Dangerous avalanche conditions exist at higher elevations as new snow settles. Human triggering potential persists as natural avalanche activity tapers off.




Avalanche Summary

On Monday, accumulating storm snow was reported to be reactive to skier traffic and some size 1 storm snow avalanches were observed. Storm snow was most reactive where it sits above a layer of fragile surface hoar. See these MIN's from Mystery Peak and Mt Strachan for images and descriptions.

If you head into the backcountry by any method of travel, please consider submitting observations and/or photos on the Mountain Information Network.

Snowpack Summary

40 to 60 cm of storm snow blankets the North Shore Mountains. This overlies 50-80 cm of recent snow over a crust and a well-settled snowpack in the alpine and upper treeline. Extreme southwest winds have built thick slabs in lee feature at treeline and in the alpine.

The last few storms have brought winter to the North Shore Mountains, and lower-elevation areas may reach the threshold for avalanches.

Weather Summary

Tuesday Night

Cloudy with isolated flurries, 1-5 cm of snow. Northwest ridgetop winds 40 to 60 km/h. Treeline temperature -6 °C.


A mix of sun and cloud. Northerly valley bottom outflow wind 25 to 40 km/h and northwest ridgetop winds 10 to 20 km/h. Treeline temperature -7 °C.


A mix of sun and cloud with isolated flurries, 2 cm of snow. Northerly valley bottom outflow wind 30 to 50 km/h and northwest ridgetop winds 40 to 70 km/h. Treeline temperatures drop through the day to -13 °C.


Mainly sunny. Northwest ridgetop winds 20 to 50 km/h. Treeline temperatures drop to -17 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Investigate the bond of the recent snow before committing to your line.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.


Storm Slabs

An icon showing Storm Slabs

Up to 60 cm of storm snow and strong southwest, switching to northwest, winds have built reactive storm slabs in lees. Storm slabs may be most reactive where they sit above a fragile layer of surface hoar.

Aspects: All aspects.

Elevations: All elevations.



Expected Size

1 - 2.5

Valid until: Jan 10th, 2024 4:00PM