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Avalanche Forecast

Archived

Feb 6th, 2025–Feb 7th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Banff Yoho Kootenay, Banff, East Side 93N, Kootenay, Lake Louise, LLSA, Sunshine, West Side 93N, Field.

Small windslabs may be found in alpine terrain. These have been generally small and stubborn to trigger but may be enough to ruin your day in steep terrain.

Eastern areas of the region have a weaker than normal snowpack this year and avalanche terrain in these areas should be approached with caution.

Confidence

Moderate

Avalanche Summary

On Thursday, local ski hills were reporting thin hard windslabs ~ 10cm thick from the overnight winds. These were quite small in size and not overly reactive to skiier traffic.

No other avalanches observed or reported in our bulletin region, however there was a significant avalanche just west of our region that likely failed on the Jan. 30th layer in an area with a deeper snowpack and more of a slab above this layer.

Snowpack Summary

Last weekend's storm has settled into 15-20 cm of snow with variable wind effect. This recent snow has buried a new weak layer (dated January 30) which will be important to watch in the future. Currently, minimal slab properties overlying the Jan 30th layer keep the danger moderate to low. The mid-pack is generally weak and faceted with an old crust and depth hoar near the base. The snowpack is the weakest in eastern areas where the basal weaknesses should not be forgotten.

Weather Summary

Dry and cold conditions will persist. Winds will be light on Friday and increase to moderate from the west overnight and into Saturday. We may see a trace of snow on Saturday night and winds will decrease on Sunday.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Be mindful that deep instabilities are still present in the snowpack.

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.