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Avalanche Forecast

Archived

Feb 18th, 2025–Feb 19th, 2025

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

Regions

Kitimat, Nass, Rupert, Seven Sisters, Shames, Howson.

New wind slabs will form though the day.Verify conditions as you travel and seek out terrain sheltered from the wind for the best riding.

Confidence

Moderate

Avalanche Summary

Several size one storm slab and dry loose avalanches were reported on Sunday. These avalanches ran on a layer of facets and surface hoar just beneath the new snow.

Snowpack Summary

10 to 15 cm of new snow now overlies a previously heavily wind effected surface. Faceting of the upper snowpack is widespread, and surface hoar up to 8 mm has been buried beneath the new snow at the treeline and below.

Two layers of surface hoar exist between 40 cm and 60 cm beneath the snow surface, there hasn't been much avalanche activity on these layers.

A layer of facets on top of a crust from early December is buried 100 to 200 cm deep. This layer is generally not a concern in this region.

Weather Summary

Tuesday Night

Cloudy with up to 10 cm of snow. 20 to 40 km/h variable ridgetop wind. Treeline temperature -3 °C.

Wednesday

Cloudy with up to 7 cm of snow. 20 to 30 km/h northeast wind. Treeline temperature -1 °C.

Thursday

Cloudy with 10 to 15 cm of snow except 25 cm near the coast and up to 5 mm of rain. 60 to 90 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 1200 m.

Friday

Cloudy with 10 to 20 cm of snow with up to 3 mm of rain. 70 to 100 km/h south ridgetop wind . Treeline temperature 2 °C. Freezing level 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Pay attention to the wind; once it starts to blow, sensitive wind slabs are likely to form.

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.