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Avalanche Forecast

Archived

Dec 12th, 2024–Dec 13th, 2024

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

Regions

Sea To Sky, Brandywine, Garibaldi, Homathko, Spearhead.

If snowfall exceeds 20 cm, bump the danger rating to "Considerable."

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported in the last 2 days. A natural avalanche cycle is expected this weekend.

Snowpack Summary

The incoming storm snow will fall on a variety of surfaces. Surface hoar in wind-sheltered terrain at treeline and below, a thin melt-freeze on south-facing slopes, and old storm snow at higher elevations. A crust can be found down 5-30 cm. The mid and lower snowpack is well-settled with no layers of concern.

Weather Summary

Thursday Night

Cloudy with less than 5 cm snow. 10 to 30 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

Friday

Snow 5 to 20 cm. 25 to 45 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 1200 m.

Saturday

Snow up to 30 cm by the afternoon. 20 to 60 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 1400 m.

Sunday

Snow 5-10 in the morning. 10-20 km/h ridgetop winds. Treeline temperature -7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • 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.