Avalanche forecast

Sea To Sky

Apr 4 – 5, 2025Avalanche Canada
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Archived · expired last year

Avalanche danger

Sun
Mon
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Cornice and wet loose avalanches are possible in steep terrain.

Use caution on sun-exposed slopes and always practice good travel habits.

Avalanche problems

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–2.5

    Cornices hang over ridges and may be triggered by sunshine or people travelling along ridgelines.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5

    Periods of sun could trigger wet loose avalanches.

Confidence

Moderate

Avalanche Summary

Since last weekend, reports have been limited to small wind slabs and wet loose avalanches, along with a few cornices triggered by explosives.

Following last week's widespread avalanche cycle, the persistent slab problem is now dormant and would likely require a very large cornice fall on an isolated slope to trigger.

Snowpack Summary

Dry, settled powder may still be found on high north-facing slopes, while elsewhere, a daily melt-freeze cycle is creating a hard crust overnight that softens during the day.

Old persistent weak layers may still exist 1 to 3 m deep on high north-facing slopes, but they are rounding and unreactive under current conditions.

The snowpack thins quickly at lower elevations

Weather Summary

Friday Night

Partly cloudy. 20 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1900 m.

Saturday

Mix of sun and cloud. 30 km/h south ridgetop wind. Treeline temperature +2 °C. Freezing level 2400 m.

Sunday

Cloudy with 5 to 10 cm of snow above 1800 m. 50 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

Monday

Cloudy with 10 to 20 cm of snow above 1200 m. 60 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate big and steep terrain features before committing to them.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Limit exposure to steep, sun exposed slopes, especially when the solar radiation is strong.

Regions covered