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Avalanche Forecast

Archived

Nov 30th, 2024–Dec 1st, 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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Vancouver Island, East Island, North Island, South Island, West Island.

Be alert to conditions that change with elevation and exposure to sun and wind.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported.

If you are out in the backcountry please consider filling out a Mountain Information Network report.

Snowpack Summary

Previous strong winds likely built wind slabs on leeward slopes near ridgetops. These slabs should bond quickly with the warming trend.

High freezing levels and some sun on Sunday may melt the surface snow on sunny aspects and create a new sun crust by the end of the day.

Up to 30 cm of snow at upper elevations may be covering surface hoar on sheltered features and a sun crust on steep south facing terrain.

We are not tracking any concerning weak layers in the mid or lower snowpack at this time.

Snow depths vary across the region. Currently near Mt.Washington, 135 cm is reported at 1100 m, and 250 cm at 1500 m.

Weather Summary

Saturday Night

Cloudy with light rain or 0 to 4 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature 3 °C. Freezing level rising to 1500 m.

Sunday

A mix of sun and cloud. 35 km/h southwest ridgetop wind. Treeline temperature 4 °C. Freezing level rising to 2700 m.

Monday

Mostly sunny. 20 to 30 km/h southwest ridgetop wind. Treeline temperature 8 °C. Freezing level 3000 m.

Tuesday

Mostly sunny. 25 km/h northwest ridgetop wind. Treeline temperature 7 °C Freezing level 2800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation and sun exposure.
  • Carefully evaluate steep lines for wind slabs.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.

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.