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Avalanche Forecast

Archived

Nov 28th, 2024–Nov 29th, 2024

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

Regions

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

Fresh snowfall continues to accumulate, leading to the formation of new slabs. Seek out low-elevation terrain that is less impacted by the strong alpine winds.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported. Natural avalanche activity is likely over the coming days, particularly in regions receiving higher snowfall amounts.

Observations remain very limited this early in the season. If you head into the backcountry, please post to the Mountain Information Network

Snowpack Summary

New snow continues to form reactive wind and storm slabs at the surface. The recent snow has buried a variety of surfaces, including old wind-affected surfaces, along with a chance of surface hoar or faceted crystals in wind-sheltered terrain.

A crust formed in early November may be present in the mid-snowpack, with possible faceted crystals above or below it.

The lower snowpack is largely comprised of several old melt-freeze crusts and potentially large depth hoar crystals in some areas.

Snowpack depth at treeline is roughly 100 cm, with snow depths decreasing rapidly at lower elevations.

Weather Summary

Thursday Night

Cloudy with 10 to 20 cm of snow, local values around Pine Pass and to the north may see less accumulation. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -12 °C.

Friday

Cloudy with 10 to 20 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -12 °C.

Saturday

Cloudy with 5 to 15 cm of snow. 40 to 60 km/h south ridgetop wind. Treeline temperature -12 °C.

Sunday

Cloudy with 5 to 15 cm of snow. 40 to 60 km/h south ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.
  • Sheltered slopes at lower elevations will offer the safest conditions.
  • Be cautious of buried obstacles, especially below treeline.

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.