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Avalanche Forecast

Archived

Apr 15th, 2025–Apr 16th, 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

Microwave-Sinclair, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

If there is no crust on the surface, triggering a persistent slab may be possible.

Most likely on high, north facing terrain in the alpine.

Confidence

Low

Avalanche Summary

A large avalanche was reported in the Evelyn area on a northeast aspect on Saturday. Check out the details in this MIN.

Snowpack tests continue to show reactivity on buried weak layers, but it's getting hard to pinpoint where they are a problem.

Read a great report from the field team here.

Snowpack Summary

10 to 15 cm of recent snow covers variably wind-affected snow in open terrain at upper elevations. A crust is found up to 2000 m and higher on solar slopes.

Below 1100 m the snowpack is wet and unconsolidated.

Two layers of currently exist in the mid-snowpack.

  • A layer of surface hoar that formed in early March can be found at a depth of 40 to 70 cm.

  • A layer of facets, surface hoar, and/or a crust from mid-February is buried 60 to 120 cm deep.

The remainder of the snowpack is well consolidated.

Weather Summary

Tuesday Night

Partly cloudy. 30 to 40 km/h northwest ridgetop wind. Treeline temperature -7 °C.

Wednesday

Mostly sunny. 10 to 20 km/h north ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

Thursday

Mostly sunny. 15 km/h northwest ridgetop wind. Treeline temperature +5 °C. Freezing level 3100 m.

Friday

Mostly cloudy with 5 to 10 cm of snow. 20 to 40 km/h west ridgetop wind. Treeline temperature +1 °C. Freezing level 2800 m in the morning, falling to 1500 m by the end of day.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.

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.