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Avalanche Forecast

Archived

Apr 9th, 2025–Apr 10th, 2025

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

Regions

Cariboos, Blue River, Clearwater, McBride, Premier, Quesnel, Clemina, Renshaw, Robson.

Reactive wind slabs may exist at treeline and in the alpine on north through east-facing terrain.

Rising freezing levels and brief periods of sun could trigger wet loose avalanches.

Confidence

Moderate

Avalanche Summary

On Tuesday, several natural wind slab avalanches (up to size 2) were reported on east aspects above 2300 m.

Reactive wind slabs likely exist in the alpine on north through east aspects. Wet loose avalanches are possible when freezing levels rise.

Snowpack Summary

At upper elevations, recent snowfall has deposited up to 20 cm of new snow, leading to a settling snowpack reaching up to 40 cm on northerly aspects above 2600 m. A surface crust has formed at treeline. However, this crust is likely to soften with rising freezing levels.

Beneath this surface crust, a 5 to 25 cm crust from the late March rain event is present. A poor bond may exist between the new snow and this underlying crust.

A persistent weak layer comprising of surface hoar, facet, and crust layer from early March, is buried 60 to 120 cm deep.

The lower snowpack is generally well-settled and strong in most areas.

Weather Summary

Wednesday Night

Cloudy with new snow up to 10 cm. 20 to 45 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level falling to 1000 m.

Thursday

Cloudy with snow starting in the afternoon up to 10 cm. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 2000 m. Freezing level dropping to 900 m overnight.

Friday

Cloudy with flurries 5 cm. 25 to 45 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1400 m.

Saturday

Mix of sun and cloud with isolated flurries. 15 gusting to 45 km/h northwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.
  • Cornice failures could trigger large and destructive avalanches.

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.