Avalanche Forecast

Issued: Feb 2nd, 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, Persistent Slabs and Deep Persistent Slabs.

Avalanche Canada wlewis, Avalanche Canada


Small but reactive wind slabs may form as storm snow accumulates.

Continue to avoid large and consequential terrain while the snowpack cools and strengthens.




Avalanche Summary

Natural avalanche cycles continued throughout this week with rain, warming, and sunshine weakening the upper snowpack. Wet loose and slab avalanches were reported to size 3. Natural activity has tapered off as temperatures gradually cool.

Moving forward avalanche activity will become more likely as storm snow accumulates.

Snowpack Summary

5-15 cm of new snow is expected to accumulate over Saturday. This will fall over moist snow at low elevations, or over a crust at higher elevations.

The top 50 cm of snow at treeline is moist with several layers of crusts and facets below. At the base of the snowpack, weak faceted grains and depth hoar is present. These layers may strengthen as the temperatures cool, however, we have significant uncertainty about the reactivity of these layers moving forward.

Weather Summary

Friday Night

Cloudy with up to 3 cm of new snow expected. Locally heavier amounts may be seen, up to 15 cm is possible near Invermere. Freezing levels remain above 1500 m overnight. Light and variable winds.


Cloudy with up to 5-15 cm of new snow expected in most areas favoring the eastern slopes of the Purcells. Northeast winds start light and increase over the day to 40 km/h. Freezing levels around 1500 m, treeline temperatures near -4°C.


Mostly cloudy with up to 5 cm of new snow expected. Freezing levels around 1300 m, treeline temperatures around -6°C. Light and variable winds.


A mix of sun and cloud with possible flurries. Freezing levels drop to 1000 m. Southeast winds 10-20 km/h.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Be aware of the potential for surprisingly large avalanches due to deeply buried weak layers.


Wind Slabs

An icon showing Wind Slabs

Watch for reactivity in wind affected features. Although Saturday's storm totals will be small, slabs may slide easily on the crust below.

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

Elevations: Alpine, Treeline.



Expected Size

1 - 1.5

Persistent Slabs

An icon showing Persistent Slabs

Multiple weak layers in the top meter of the snowpack remain a concern.

Aspects: All aspects.

Elevations: Alpine, Treeline.



Expected Size

1.5 - 2.5

Deep Persistent Slabs

An icon showing Deep Persistent Slabs

If triggered, this problem will likely be the full depth of the snowpack and could run below treeline. Avoid shallow, rocky start zones.

Aspects: All aspects.

Elevations: All elevations.



Expected Size

2 - 4

Valid until: Feb 3rd, 2024 4:00PM