Avalanche Forecast

Low

Both natural and human-triggered persistent and deep persistent slab avalanches continue to be reported daily. On Friday east of Prince George, skiers triggered a size 2 deep persistent avalanche on a northeast slope at 1700m, the avalanche was triggered from the shallowest portion of the feature and the crown depth varied from 30 cm to 1 m. Additionally, two very large (size 2.5-3) natural wind slabs were reported on northeast-east and southeast aspects around 1900 m.

On Thursday a few very large (size 2.5-3) natural wind slab avalanches were reported around 1800-2000 m. Additional ongoing evidence of weak basal facets continued with a size 3 deep persistent avalanche reported on a steep southeast slope at 2400 m.

On Monday, a fatal skier-triggered avalanche incident occurred in the Selkirk range near Revelstoke. The avalanche occurred on an east aspect at 1900 m, on a steep, open and unsupported slope. The size 2 avalanche had a crown depth of 50 cm and failed on surface hoar buried in early January.

Last weekend (Saturday), a fatal avalanche incident occurred in the Oasis riding area south of Valemont. This avalanche resulted in a rider fatality. This was a remotely triggered (from a distance) size 2.5 deep persistent slab avalanche on a north-northwest aspect at 2100 m. More details can be found here.

Avalanches like these are most likely to be triggered on steep, shallow and previously undisturbed slopes. Your best defence at this time is to stay diligent in choosing low-consequence terrain that has been heavily trafficked throughout the winter. Stay disciplined and adjust your expectation for this winter.

20-40 cm recent snowfall covered a layer of surface hoar and thin crust on solar aspects at treeline and higher, and a supportive crust up to 1800 m. North and westerly winds have redistributed loose snow to lee terrain.

A prominent layer of buried surface hoar can be found roughly 40-70 cm deep. It is found in some places but not in others, and has been recently reactive to human triggering. The bottom of the snowpack is made up of large weak facets buried in late November, causing the Deep Persistent Slab problem for this region.

Saturday night

Clear and with gusty ridgetop winds. Ridge wind northwest reaching 30 km/hr. Alpine temperature -24 C.

Sunday

Sunny in the morning with increasing clouds throughout the day. Ridge wind northwest 15-30 km/hr. Alpine temperature -20 C.

Sun and increasing cloud. Ridge wind southwest 15-30 km/hr. Alpine temperature rising to -16 C.

Flurries, 5-10 cm. Increasing southwest ridge wind 30-40 km/hr. Alpine temperatures rising to -12 C.

More details can be found in the Mountain Weather Forecast.

• Be mindful that deep instabilities are still present and have produced recent large avalanches.
• Approach lee and cross-loaded slopes with caution.
• Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.