North Columbia

Large skier triggered persistent slab avalanches continue to be reported, including remote triggers.

Triggering is most likely on northerly aspects at upper elevations.

On Saturday, a skier remotely triggered a size 2 persistent slab on a north aspect below a treeline ridgetop near Revelstoke.

A solar radiation triggered size 2 storm slab was also reported on a southerly aspect in the alpine.

Additionally, numerous natural and skier triggered wet loose avalanches up to size 2 were reported.

10 to 20 cm of snow overlies a wet, rain-soaked upper snowpack. Expect a surface crust to form at night on most terrain, except possibly on high north alpine slopes.

Recent avalanche activity has involved multiple persistent weak layers. The most common failure layer is the early March surface hoar, facet, and crust layer, buried 70 to 150 cm deep.

Many avalanches have also stepped down to deeper weak layers from February and January, buried 150 to 200 cm deep.

These layers are still adjusting to recent stress and remain a concern for human-triggering and step-down avalanches.

Sunday Night

Partly cloudy. 10 to 20 km/h east ridgetop wind. Treeline temperature -5 °C. Freezing level 1000 m.

Monday

Mostly cloudy with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 1800 m.

Tuesday

Mostly cloudy with flurries, 0 to 10 cm snow. 10 to 20 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 m.

Wednesday

Mostly cloudy with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 1600 m.

More details can be found in the Mountain Weather Forecast.

• In times of uncertainty, conservative terrain choices are our best defense.
• Remote triggering is a concern; avoid terrain where triggering overhead slopes is possible.
• Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
• Cornice failures could trigger large and destructive avalanches.