Avalanche Forecast

Issued: Jan 12th, 2024 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada wlewis, Avalanche Canada


Strong winds have built wind slabs on south facing slopes.

While danger ratings decrease, reactivity may still be found in specific features.




Avalanche Summary

No new avalanches have been reported.

During the storm on Monday and Tuesday, storm slabs up to size 2.5 occurred. On Tuesday near Mount Washington, several skier-triggered storm slabs up to size 1.5 were reported from steep or wind-loaded terrain at treeline.

Reactivity in wind loaded features is expected to continue.

Snowpack Summary

Up to 90 cm of recent snow has been transported into wind slabs on south and east facing slopes by strong northwest winds. Expect to find pockets of dense and deep wind slab in wind loaded terrain and crusts or bare ground in high elevation exposed terrain.

The remainder of the snowpack is strong, with numerous hard melt-freeze crusts.

Treeline snow depths generally range from 50 to 150 cm. Snow depth diminishes rapidly below 500 m where there has been more rainfall.

Weather Summary

Friday Night

Mostly clear skies. Northwest winds ease to 10-30 km/h. Treeline temperatures remain steady around -17 °C.


Sunny with afternoon cloud possible. Northwest winds 10-20 km/h. Treeline temperatures may reach -9 °C.


Sunny skies with northerly winds 20-40 km/h. Treeline temperatures finally climb out of the deep freeze, reaching -4 °C.


Sunny skies with northerly winds 10-20 km/h. Treeline temperatures around-3 °C.

With unusually cold temperatures forecast for this weekend, check out the most recent Forecaster Blog for tips on backcountry preparedness.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Wind slabs are most reactive during their formation.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.


Wind Slabs

An icon showing Wind Slabs

Fresh winds slabs can be found on south facing slopes, while older wind slabs on north facing slopes likely still exist. Watch for crossloading in unusual features like mid slope gullies and rollovers.

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

Elevations: Alpine, Treeline.



Expected Size

1 - 2

Valid until: Jan 13th, 2024 4:00PM