Avalanche forecast

Sea To Sky

Dec 1, 2017Avalanche Canada
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Avalanche danger

Sat
Sun
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Successive moderate storms will keep danger elevated, particularly in steep, wind-affected terrain. If the 24 hour snow amounts exceed 25 cm, bump avalanche danger up by one rating.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2
    Wind slabs are building over a crust layer. This layer may slide easily, particularly on steep convex terrain or where the wind has blown it into more cohesive slabs.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

Friday: 10-15 cm new snow with freezing levels around 1000 m. Strong southwesterly winds.Saturday: 10-15 cm new snow with freezing levels around 900 m. Moderate southerly winds.Sunday: Dry with some sunny breaks. Light northwesterly winds.

Avalanche Summary

Ski cutting produced soft slab avalanches up to size 1.5 in recent storm snow at treeline and alpine elevations on Tuesday and Wednesday. Similar activity is anticipated for Friday.

Snowpack Summary

Approximately 40-50 cm new snow now sits on top of a rain crust (or multiple crusts) that formed during the recent wet weather. Strong winds have blown snow around in exposed areas creating drifts and scoured areas. Snowpack depths are typically around 150 cm in sheltered treeline locations, although deeper (and shallower) spots certainly exist on account of the strong winds.

Regions covered