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Avalanche Forecast

Archived

Dec 13th, 2025–Dec 14th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Crowsnest North, Crowsnest South.

A strong surface or near-surface crust has reduced the likelihood of triggering an avalanche, use caution anywhere the crust is absent or thin and weak.

Confidence

Moderate

Avalanche Summary

No avalanche activity has been reported since the warm and wet storm earlier this week.

If you've been out in the backcountry, please consider sharing your observations on the MIN.

Snowpack Summary

Trace amounts of new snow now overlie a widespread melt–freeze crust that is likely present on all aspects and elevations, though some high-alpine terrain may remain crust-free.

A mid-November crust is buried 50 to 100 cm deep. Beneath it, the snowpack contains several additional crust layers, and in some locations, a weak, sugary facet layer exists near the ground.

At treeline, snow depths range from roughly 50 to 100 cm, tapering off quickly at lower elevations.

Weather Summary

Saturday Night
Partly cloudy. 80 km/h west ridgetop wind. Treeline temperature -1 °C.

Sunday
Mix of sun and clouds. Trace amounts of snow at treeline. 90 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Monday
Mostly cloudy. 5 to 10 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2200 m.

Tuesday
Mostly cloudy. 10 to 20 cm of snow at treeline. 60 km/h southwest ridgetop wind. Treeline temperature -2 °C.

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.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.