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Avalanche Forecast

Archived

Feb 5th, 2025–Feb 6th, 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.

Use extra caution in exposed terrain where wind affect is significant

The best riding will be found in sheltered terrain

Confidence

Moderate

Avalanche Summary

No new slab avalanches have been reported in the region since Sunday.

Snowpack Summary

Moderate to strong northeast outflow wind has heavily impacted the snow surface in exposed terrain. In sheltered terrain 20 to 40 cm of snow overlies a layer of facets and a crust from late January. Surface hoar may also be found at this interface.

A layer of facets and crust from early December is buried approximately 60 to 120 cm deep.

Weather Summary

Wednesday Night

Clear skies. 10 to 20 km/h east ridgetop wind. Treeline temperature -15 °C, potential for temperature inversion with colder temperatures at valley bottom.

Thursday

Mostly sunny. 20 to 30 km/h east ridgetop wind. Treeline temperature -18 °C.

Friday

Mostly sunny. 20 to 30 km/h westerly ridgetop wind. Treeline temperature -17 °C.

Saturday

Sunny. 20 to 40 km/h westerly ridgetop wind. Treeline temperature -13 °C, potential for temperature inversion with colder temperatures at valley bottom.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

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.