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Avalanche Forecast

Archived

Mar 30th, 2025–Mar 31st, 2025

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

North Columbia, South Columbia, Esplanade, Jordan, North Monashee, North Selkirk, Badshot-Battle, Central Selkirk, Goat, Gold, Retallack, Valhalla, Whatshan.

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

Triggering is most likely on northerly aspects at upper elevations.

Confidence

Moderate

Avalanche Summary

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.

Snowpack Summary

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.

Weather Summary

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.

Terrain and Travel Advice

  • 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.

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.