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

Regions

Sea To Sky, South Coast Inland, Brandywine, Garibaldi, Homathko, Spearhead, Tantalus, Sky Pilot, Birkenhead, Duffey, Harrison-Fraser, South Chilcotin, Stein, Taseko.

Avoid areas where the wind has created deep deposits.

The new snow could be sitting on a touchy layer of surface hoar.

Confidence

Moderate

Avalanche Summary

A few small (size 1 to 1.5) glide avalanches were observed on the Duffey Lake road in the past three days.

Snowpack Summary

Large surface hoar crystals may be getting buried by new snow today. In sheltered areas, this could become a touchy avalanche problem.

Thin melt-freeze crusts may be found on sun-exposed slopes.

The middle of the snowpack is generally well-settled with no layers of concern.

The most prominent of several melt-freeze crusts in the lower snowpack is 100 - 150 cm deep in the Whistler area and decomposing.

Snowpack height is around 120 to 150 cm at treeline and decreases rapidly below about 1500 m.

Weather Summary

Friday Night

Cloudy with 5 cm of snow. 40 to 50 km/h west ridgetop wind. Treeline temperature -4 °C.

Saturday

Cloudy with up to 5 cm of snow. 30 to 40 km/h west ridgetop wind. Treeline temperature -3 °C.

Sunday

A mix of sun and cloud with 2 cm of snow, ending in the morning. 20 to 30 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 2000 m.

Monday

Sunny. 10 km/h southwest ridgetop wind. Treeline temperature 4 °C. Freezing level 3000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Shooting cracks, whumpfs, and recent avalanches are strong indicators of an unstable snowpack.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Watch for fresh storm slabs building throughout the day.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.