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Avalanche Forecast

Archived

Mar 21st, 2024–Mar 22nd, 2024

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

Regions

Northwest Inland, Kispiox, Microwave-Sinclair, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

A gradual cooling and overnight recovery should decrease the likelihood of avalanches.

Uncertainty remains on how quickly the persistent slabs will gain strength.

Confidence

Moderate

Avalanche Summary

No new recent avalanches were reported.

Debris from the past widespread avalanche cycle are still visible throughout the region.

If you go into the backcountry, please submit your observations to the Mountain Information Network.

Snowpack Summary

A melt-freeze crust exists on the surface in most areas. The frozen surface may soften throughout the day at lower elevations and south-facing slopes. Dry powder snow can still exist on true north-facing alpine slopes. A weak layer of surface hoar is developing in sheltered areas at treeline. At lower elevations, snowpack was isothermal the last few days.

A layer of weak, faceted crystals over a crust, or surface hoar, remains a lingering concern, buried approximately 40 to 80 cm deep. This layer produced impressive avalanches during the past weekend.

Weather Summary

Thursday Night

Clear periods. 10 to 30 km/h south ridgetop wind. Treeline temperature -10 °C. Freezing level at valley bottom.

Friday

Sunny. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -5 °C. Freezing level near 1000 m. Overnight refreeze expected.

Saturday

Sunny. 20 to 40 km/h northeast ridgetop wind. Treeline temperature -5°C. Freezing level 1000 m. Overnight refreeze expected.

Sunday

Sunny. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -2°C. Freezing level rising to 1000 m. Overnight refreeze expected.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep in mind that human triggering potential persists as natural avalanching tapers off.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.

Problems

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.