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Avalanche Forecast

Archived

Mar 13th, 2025–Mar 14th, 2025

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

Regions

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

Recent storm snow may need extra time to settle. Use caution, especially where more than 20 cm has accumulated.

Confidence

Moderate

Avalanche Summary

Throughout this past week, a few small to large (size 1 to 2) wind slab avalanches out of steep alpine terrain where reported.

Snowpack Summary

Up to 60 cm of snow has accumulated in the past week and overlies a hard melt-freeze crust and perhaps isolated surface hoar crystals in wind-sheltered treeline terrain. The snow may be deeper and touchier in wind-exposed lee features.

A weak layer of surface hoar and/or faceted grains buried mid-February is around 50 to 100 cm deep, but is showing signs of strengthening.

The lower snowpack is well-settled.

Weather Summary

Thursday Night

Cloudy with trace amounts of snow. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -16 °C.

Friday

Mix of sun and cloud. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -14 °C.

Saturday

Mostly sunny. 10 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Sunday

Mix of sun and cloud. 40 km/h south ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

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.