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Avalanche Forecast

Archived

Jan 15th, 2025–Jan 16th, 2025

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

Regions

Northwest Inland, Kispiox, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

New snow and strong winds are driving the avalanche danger. Stick to conservative terrain and assess snowfall amounts and wind transport in your local riding area.

Confidence

Moderate

Avalanche Summary

No new reports.

Natural avalanche activity is likely with incoming snow and wind.

Snowpack Summary

Up to 25 cm of forecast snow is expected by Thursday afternoon. Strong southwest winds will likely build thicker slabs on lee slopes. The new snow may have a poor bond to south-facing slopes and areas below 1200–1300 m where it sits on a crust.

A persistent weak layer composed of facets overlying a crust is buried 40 to 90 cm deep and may be reactive with the new load from snow and wind.

Weather Summary

Wednesday Night

Snow 10 to 20 cm. 50 to 60 km/h southwest ridgetop wind. Treeline temperature -8 °C. The freezing level drops to the valley bottom.

Thursday

Cloudy with 5 to 10 cm. 30 gusting to 70 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level 900 m.

Friday

A mix of sun and cloud. 10 to 20 km/h north ridgetop wind. Treeline temperature -10 °C. Freezing valley bottom.

Saturday

Cloud with sunny periods. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -10 °C. Freezing level valley bottom.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.