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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

Blue River, Clearwater, Premier, Clemina.

Large human triggered persistent slab avalanches continue to be reported.

Triggering is most likely on northerly aspects at upper elevations.

Confidence

Low

Avalanche Summary

On Saturday, a sledder triggered size 2 persistent slab avalanche was reported below an alpine ridgetop near the Clemina Creek. See MIN

Numerous naturally triggered wet loose avalanches up to size 2 were also reported.

NOTE: Observations in this region are currently very limited.

Snowpack Summary

Recent convective snowfall has been highly variable, accumulating over a crust in most areas except shady aspects in the high alpine where soft or wind affected dry snow may be found.

The primary weak layer of concern is a surface hoar, facet, and crust layer from early March, buried 50 to 100 cm deep. While its distribution and sensitivity remain uncertain, it has been highly reactive in the neighbouring Monashee regions.

The lower snowpack is likely strong and bonded in most areas.

Weather Summary

Sunday Night

Mostly clear. 10 to 20 km/h east ridgetop wind. Treeline temperature -5 °C. Freezing level valley bottom.

Monday

Mix of sun and cloud. 10 to 20 km/h variable ridgetop wind. Treeline temperature -1 °C. Freezing level 1800 m.

Tuesday

Mostly cloudy with isolated flurries, 0 to 3 cm snow. 10 to 20 km/h west ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.

Wednesday

Mix of sun and cloud. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1300 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.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Cornice failures could trigger large and destructive avalanches.
  • Loose avalanches may step down to deeper layers, resulting in larger 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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.