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Avalanche Forecast

Archived

Nov 21st, 2023–Nov 22nd, 2023

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Early Season
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Early Season
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Early Season

Regions

Brazeau, Cirrus-Wilson, Icefields.

Watch for a widespread temperature crust formed on Tuesday from above freezing temperatures to 3000m. This layer could potentially become an issue in the future.

Early Season Conditions persist, so travel with caution.

Confidence

Low

Avalanche Summary

Whumphing was reported in the Hilda ridge area on Saturday. Extreme to strong winds and above freezing temperatures to 3000m on Tuesday could increase avalanche activity.

Snowpack Summary

The snowpack is very shallow with only 25-40cm at treeline. The alpine is heavily wind effected with scoured windward slopes and ridges. Snowpack can be a meter deep in leeward features. Expect a temperature crust on all aspects to mountain top.

Weather Summary

The Mountain Weather Forecast is available from Avalanche Canada https://avalanche.ca/weather/forecast

Wednesday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -5 °C.

Ridge wind northwest: 10-20 km/h.

Thursday

Sunny with cloudy periods.

Alpine temperature: Low -11 °C, High -6 °C.

Ridge wind light.

Terrain and Travel Advice

  • Watch for areas of hard wind slab on alpine features.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.