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Avalanche Forecast

Archived

Mar 9th, 2025–Mar 10th, 2025

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

Regions

North Rockies, Sugarbowl, East Kakwa, Kakwa, McGregor, Pine Pass, Renshaw, Robson, Tumbler.

Continuously assess and verify conditions as you move through the mountains

Recent snowfall amounts are highly variable, we have uncertainty in both the size and likelihood of avalanches

Confidence

Low

Avalanche Summary

On Saturday, a small natural wind slab avalanche was observed in the PK backcountry, check out this detailed MIN for more info.

Snowpack Summary

New snowfall amounts in the region are highly variable, By Monday morning 10 to 40 cm may have fallen with moderate southwest winds, forming deeper deposits on north and east aspects. This new snow will overlie a crust on all aspects and elevations except higher north facing slopes.

A weak layer of surface hoar or facets from mid February is found 30 to 80 cm down in many areas. A second weak layer buried 60 to 120 cm from late January consists of surface hoar, facets, and/or a hard crust.

The lower snowpack is well settled and bonded.

Check out this great MIN from Hasler, where recent snowfall amounts were on the lesser side.

Weather Summary

Sunday Night

Mix of cloud and clear skies with up to 5 cm of snow. 10 to 30 km/h west ridgetop wind. Treeline temperature -3 °C, potential for inversion with colder temps below treeline.

Monday

Mostly cloudy with 0 to 2 cm of snow. 10 to 30 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Tuesday

Mostly cloudy with around 5 cm of snow. 15 to 25 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Wednesday

Mostly cloudy with around 5 cm of snow. 10 to 20 km/h east ridgetop wind. Treeline temperature -7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be careful as you transition into wind-affected terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.