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Avalanche Forecast

Archived

Feb 4th, 2024–Feb 5th, 2024

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

Kootenay Boundary, South Columbia, Bonnington, Grohman, Norns, Rossland, South Okanagan, Esplanade, North Selkirk, Badshot-Battle, Central Selkirk, Goat, Gold, North Okanagan, Valhalla, Whatshan.

Fresh snowfall is gradually accumulating over a strengthening crust.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported.

Snowpack Summary

Anywhere from 0 to 30 cm of recent, dry snow sits atop a widespread crust at higher elevations. While the surface snow remains moist at lower elevations in most areas.

Deeper in the snowpack a layer of facets (and small surface hoar in some areas) is buried 30-60 cm deep, while a second layer of facets on a crust is buried 80-100 cm deep.

Weather Summary

Sunday Night

Cloudy with 0 to 5 cm of snow, south alpine winds 0 to 20 km/h, treeline temperature -5 °C.

Monday

Cloudy with 0 to 3 cm of snow, south alpine winds 0 to 20 km/h, treeline temperature -5 °C.

Tuesday

Cloudy with 0 to 5 cm of snow, south alpine winds 10 to 30 km/h, treeline temperature -4 °C.

Wednesday

Cloudy with 0 to 5 cm of snow, south alpine winds 10 to 30 km/h, treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • Wind slabs may be poorly bonded to the underlying crust.

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.

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.