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Avalanche Forecast

Archived

Feb 14th, 2025–Feb 15th, 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 unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Coastal, Northwest Inland, Boundary, Stewart, Kispiox, Ningunsaw, Ningunsaw, Ningunsaw.

Avoid areas where the snowpack transitions from thick to thin and triggering a weak layer is more likely.

Confidence

Moderate

Avalanche Summary

There has been no avalanche activity reported in the past few days.

However, operators in the area are still concerned about a weak layer of facets over a crust from early December that has produced large avalanches.

Snowpack Summary

Previous strong winds have scoured terrain at treeline and above on all aspects. Ongoing cold temperatures have softened the surface of wind affected terrain in many areas. In sheltered terrain 30 to 60 cm of faceted snow overlies a crust and layer of surface hoar from late January.

Another layer of surface hoar was buried near the middle of January and can be found 50 to 100 cm deep.

A weak layer of facets and a crust from early December varies in depth from 100 to 300 cm. This layer remains a concern in this region.

Weather Summary

Friday Night

Clear skies. 20 to 40 km/h east ridgetop wind. Treeline temperature -20 °C.

Saturday

Mostly sunny. 40 to 70 km/h east ridgetop wind. Treeline temperature -18 °C.

Sunday

A mix of sun and cloud. 0 to 2 cm of snow. 0 to 10 km/h southeast ridgetop wind. Treeline temperature -10 °C.

Monday

A mix of sun and cloud. 0 to 10 km/h southeast ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present and have produced recent large avalanches.

Problems

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.

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.