Avalanche forecast

Sea To Sky

Apr 13 – 14, 2025Avalanche Canada
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Avalanche danger

Tue
Wed
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Cornice falls may trigger large avalanches on slopes below.

Avoid traveling on slopes below cornices and give them a wide berth while traveling on ridetops.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Warm temperatures may increase the likelihood of triggering slabs, especially in steep, rocky, alpine terrain.

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1.5–2.5

    Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Confidence

Moderate

Avalanche Summary

On Saturday, several natural cornice failures triggered wind slabs up to size 2.5 on steep, northerly aspects in the alpine near Whistler.

Numerous wet loose avalanches up to size 2 were triggered by solar radiation on solar aspects.

Snowpack Summary

Up to 20 cm of recent snow in the alpine and strong southerly wind formed wind slabs at upper elevations.

The recent snow sits on top a crust, except for northerly aspects at upper elevations where the previous snow surface remained dry.

Recent snow amounts taper quickly with elevation.

The snowpack is generally well-settled and strong, although dormant weak layers may still exist in shallow inland areas like the Duffey and Chilcotin.

Lower elevations are melting out rapidly.

Weather Summary

Sunday Night

Mostly clear. 5 to 10 km/h west ridgetop wind. Treeline temperature 5 °C. Freezing level 2400 m.

Monday

Mostly cloudy. 5 to 10 km/h south ridgetop wind. Treeline temperature 5 °C. Freezing level 2400 m.

Tuesday

Sunny. 5 to 10 km/h west ridgetop wind. Treeline temperature 4 °C. Freezing level 2300 m.

Wednesday

Sunny. 10 to 20 km/h north ridgetop wind. Treeline temperature 2 °C. Freezing level 1900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid travelling on slopes below cornices.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

Regions covered