Avalanche forecast

Sea To Sky

Dec 12, 2017Avalanche Canada
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Archived · expired 9 years ago

Avalanche danger

Wed
Thu
Alpine
1 · Low
Treeline
1 · Low
Below
1 · Low
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Highlights

With warm temperatures and spring-like conditions, watch for moist and wet snow as crusts breakdown during the day.

Avalanche problems

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2
    With daytime warming loose wet avalanches may still be a lingering problem on steep or unsupported terrain features. These releases may start small but can gain mass quickly.

Confidence

High - The weather pattern is stable

Weather Forecast

TUESDAY: Mix of sun and cloud. Ridge wind light from the southwest. Alpine temperature +2. Freezing level 2000m.WEDNESDAY: Mix of sun and cloud. Ridge wind light from the northeast. Alpine temperature +3. Freezing level 2500m.THURSDAY: Mix of sun and cloud. Ridge wind light from the northwest. Alpine temperature +5. Freezing level 3200m.

Avalanche Summary

Numerous small to large loose wet avalanches up to size 2 were observed on solar aspects last week as well as a small natural wind slab avalanche in steep terrain on a northerly aspect in the alpine on Saturday. Warming and cloud cover on Sunday produced pinwheeling and snowballing on all aspects.

Snowpack Summary

Warm temperatures have created a spring-like, melt-freeze cycle on all aspects with the overnight crust breaking down quickly due to the ongoing sunny warm weather. Surface hoar and surface facets may still exist in shaded areas on north aspects. The upper snowpack is well settled and bonding well to the late-November rain crusts although faceting has been noted around these crusts. The lower snowpack is well settled.

Regions covered