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Avalanche Forecast

Archived

Mar 6th, 2025–Mar 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

South Okanagan, North Okanagan.

Avoid north-facing, alpine slopes where triggering persistent weak layers is most likely.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported since Monday.

On Monday, near Kamloops, a natural size 2 glide slab avalanche was reported on a southwest-facing slope at 1500 m.

On Saturday, a rider triggered size 2, persistent slab avalanche was reported. This avalanche occurred on a west facing slope at 2000 m. See MIN for details.

Snowpack Summary

5 to 10 cm of snow covers a melt-freeze crust. The crust exists on all aspects, except possibly high-elevation north-facing slopes. This overlies 30 to 60 cm of snow that sits above a crust in many areas, or surface hoar/facets in wind-sheltered areas.

A weak layer, buried in late January, consists of surface hoar/facets or a crust is found down 50 to 90 cm. This remains a lingering concern. Below this, the mid and lower snowpack is generally settled and strong.

Weather Summary

Thursday Night

Mostly clear skies. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Friday

Mix of sun and clouds. 20 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1900 m.

Saturday

Cloudy. 15 to 40 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1600 m.

Sunday

A mix of sun and cloud. 20 to 40 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present in the snowpack.
  • Keep in mind that human triggering may persist as natural avalanches taper off.

Problems

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.