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Avalanche Forecast

Archived

Apr 15th, 2025–Apr 16th, 2025

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

Regions

Kitimat, Nass, Rupert, Seven Sisters, Shames, Howson.

Riders may still trigger wind slabs in lee areas.

Conditions can change rapidly in spring, read about the 4 likely scenarios here.

Confidence

Low

Avalanche Summary

There have been no recent reports of avalanches occurring, however, information is very limited at this time of year.

Snowpack Summary

Around 30 cm of recent snow above 1500 m sits on a melt freeze crust. At low elevations, It's likely a crust is on the surface.

Three layers are notable in the snowpack:

  • Surface hoar from mid-March can be found 50 to 100 cm down.

  • A layer of surface hoar from early-March is buried 100 to 150 cm.

  • A layer of facets, surface hoar, and/or a crust from mid-February is buried 100 to 200 cm deep.

At elevations below treeline, the snow pack is rain saturated and isothermal.

Weather Summary

Tuesday Night

Partly cloudy. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Wednesday

Mostly sunny. 10 to 20 km/h northeast ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

Thursday

Mostly sunny. 10 km/h northwest ridgetop wind. Treeline temperature +5 °C. Freezing level 3200 m.

Friday

Mostly cloudy with 5 to 10 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.

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.