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Avalanche Forecast

Archived

Nov 29th, 2024–Nov 30th, 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.

Wind slabs will be most reactive on north and east facing slopes near ridgetops.For the best and safest riding, seek out sheltered terrain where new snow hasn't been affected by 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

Forecast strong southwesterly winds are expected to blow loose snow into wind slabs on leeward north and east facing slopes near ridgetops.

5 to 20 cm of new snow at upper elevations is covering a variety of surfaces including 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

Friday Night

Cloudy with up to 10 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1200 m.

Saturday

Cloudy with 2 to 8 cm of new snow. 55 km/h southwest ridgetop wind. Treeline temperature 0 °C Freezing level rising to 1400 m.

Sunday

A mix of sun and cloud. 30 km/h southeast ridgetop wind. Treeline temperature 3 °C. Freezing level rising to 2100 m.

Monday

Mostly sunny. 15 km/h variable ridgetop wind. Treeline temperature 6 °C. Freezing level rising to 3000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Be cautious of buried obstacles, especially below treeline.

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.