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Avalanche Forecast

Archived

Mar 7th, 2025–Mar 8th, 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

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

Analyze slopes for wind transport patterns to navigate around fresh slabs. A small avalanche can be a big problem in the wrong terrain. Raise your guard if snowfall exceeds forecast amounts.

Confidence

Moderate

Avalanche Summary

Our field team has reported size 2 natural slab avalanches in the Telkwas on Tuesday and Babines on Wednesday. They also observed easy propagating snowpack test results on the February layer.

Looking forward, human triggering of small, fresh wind slabs and deeper, more destructive persistent weak layers remains possible.

Snowpack Summary

Light new snow amounts are beginning to bury a widespread layer of surface hoar crystals, which sit over a crust on solar aspects and low elevations.

A layer of facets, surface hoar and/or a crust formed during the February drought, are buried 30 to 50 cm deep and give easy results in snowpack tests.

Deeper in the snowpack, a weak layer of facets and a crust from early December can be found. This layer appears to be dormant but is still worth managing in thin snowpack areas in the alpine.

Weather Summary

Friday Night

Clearing with easing flurries and a final trace of new snow. 20 to 50 km/h southwest ridgetop wind, easing. Freezing level to valley bottom.

Saturday

Mostly cloudy with isolated flurries, continuing overnight. 20 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

Sunday

A mix of sun and cloud with 1 to 10 cm of new snow from overnight. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1100 m.

Monday

Cloudy with scattered flurries continuing from overnight bringing up to 5 cm of new snow. 40 to 50 km/h south ridgetop wind, increasing. Treeline temperature -3 °C. Freezing level 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.
  • Be aware of the potential for large avalanches due to buried weak layers.

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.

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.