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Avalanche Forecast

Archived

Mar 20th, 2025–Mar 21st, 2025

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

Regions

South Okanagan, Shuswap, North Okanagan.

New snow and strong winds have built reactive wind slabs in lee features.

Caution as you transition into wind effected terrain.

Confidence

Moderate

Avalanche Summary

Two small (size 1) wind slabs were reported since Monday.

New wind slabs will build throughout the day with new snow and moderate to strong winds.

Snowpack Summary

40 to 60 cm of snow overlies a supportive crust.

Two weak layers of surface hoar and/or faceted grains associated with a crust from late January and mid-February may be found 80 to 100 cm deep.

The mid and lower snowpack is well-settled and strong.

Weather Summary

Thursday night

Cloudy with 0 to 5 cm of snow. 40 to 60 km/h southwest ridgetop winds. Treeline temperature -5 °C.

Friday

Cloudy with 5 to 15 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.

Saturday

Mix of sun and cloud with 0 to 5 cm of snow. 20 to 40 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 1500 m.

Sunday

Cloudy with 15 to 20 cm of snow. 30 to 60 km/h southwest ridgetop winds. Treeline temperature 0 °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.

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.