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Avalanche Forecast

Archived

Apr 5th, 2024–Apr 6th, 2024

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

Regions

South Coast Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

Continually assess conditions as you travel.

Rider-triggered wind slabs remain possible on recently loaded alpine features.

Confidence

High

Avalanche Summary

On Thursday, human-triggered small loose dry avalanches (size 1) occurred on steep shaded terrain on the Duffey. Solar radiation triggered natural loose avalanches up to size 1.5 throughout the region. Wind slabs were reactive to skier traffic on alpine convex roll south slopes, where recent reverse-loading occurred.

If you go into the backcountry, please consider submitting to the Mountain Information Network.

Snowpack Summary

20 to 40 cm of recent snow is found above 1600 m. This overlies a moist snow surface or a crust on all aspects, except north-facing slopes above 2000 m where dry snow remained. Recent reverse-loading has redistributed snow into southerly alpine slopes. The storm snow is rapidly settling at treeline. At lower elevations, a moist snowpack or a surface crust is found.

The facet/crust layer that produced large avalanches during early March buried 80-150 cm is currently considered unreactive and no recent avalanche activity has been observed on this layer. This problem was confined to shallow alpine areas on sheltered north aspects above 2000 m.

Weather Summary

Friday Night

Clear skies. 10 to 20 km/h southwest ridgetop wind. Treeline temperature rising to -6 °C. Freezing level 1000 m.

Saturday

Partly cloudy with isolated flurries. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1200 m.

Sunday

Partly cloudy with isolated flurries. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1500 m.

Monday

Cloudy with 3 to 5 cm of snow. 40 to 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be carefull around freshly wind loaded features.
  • Use caution on large alpine slopes, especially around thin areas that may propagate to deeper instabilities.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

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.