Avalanche forecast

Purcells

Nov 21 – 22, 2024Avalanche Canada
View on map
Archived · expired 2 years ago

Avalanche danger

Sat
Sun
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low

Highlights

A tricky avalanche problem exists. If triggered it could be very dangerous.
Stick to low-angle slopes free from terrain traps.

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    2–2.5

    Large avalanches are possible where weak, sugary facets sit on top of a crust near the base of the snowpack. This problem is most likely found in the alpine, in steep rocky areas.

Confidence

Low

Avalanche Summary

No new avalanches were reported on Wednesday or Thursday.

On Tuesday, 2 large (size 2) avalanches were triggered in the alpine near Invermere. They failed on a crust with facets near the base of the snowpack. Also, numerous small and large (size 1-2.5) natural storm slabs were seen near Jumbo.

Snowpack Summary

Up to 50 cm of recent snow sits on a layer of surface hoar on shaded slopes, or a thin crust on sunny slopes.
Near the base of the snowpack there is a crust from early November. In shallower spots, facets have been found on the crust and avalanches have been occurring on this layer.
Typical snowpack depths in the alpine are 80-120 cm.

Weather Summary

Thursday Night

Cloudy with 2 cm of snow. 10 to 20 km/h south ridgetop wind. Treeline temperature -8 °C.

Friday

Cloudy with 5 to 10 cm of snow. 10 km/h southeast ridgetop wind. Treeline temperature -5 °C.

Saturday

Mix of sun and cloud with up to 5 cm of snow. 5 km/h west ridgetop wind. Treeline temperature -5 °C.

Sunday

Mix of sun and cloud with up to 5 cm of snow. 10 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Choose simple, low-angle terrain without steep convex rolls.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
  • Avoid lee and cross-loaded slopes in the alpine.

Regions covered