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Archived

Avalanche Forecast

Apr 9th, 2025–Apr 10th, 2025
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Birkenhead, Brandywine, Duffey, Garibaldi, Homathko, Sea To Sky, South Chilcotin, South Coast Inland, Spearhead, Stein, Tantalus, Taseko.

Danger will increase Thursday afternoon with the arrival of new snow and strong wind.

Confidence

High

Avalanche Summary

Natural storm slab avalanches up to size 2.5 were reported across the region on Tuesday and Wednesday, with the largest occurring on wind-loaded alpine slopes. A few size 1 human-triggered slabs were also observed. Cornice falls continue to be triggered with explosives.

Snowpack Summary

Alpine snowfall over the past week ranged from 50 cm near the coast (e.g., Squamish) to 10 cm inland (e.g., Chilcotin). This snow is heavily wind-affected and rests on wet snow and crusts. Another 15 to 25 cm of snow is expected Thursday afternoon.

Recent snowfall amounts taper off below 1800 m, and the snowpack is melting quickly in the valleys.

In shallower inland areas like the Duffey and Chilcotin, dormant weak layers from Feb and Mar are buried 50 to 150 cm deep, but they are not a concern at this time.

Weather Summary

Wednesday Night

Partly cloudy with 0 to 2 cm of snow. 30 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 1500 m.

Thursday

Cloudy with 15 to 25 cm of snow above 1500 m. 60 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

Friday

Mix of sun and cloud with 1 to 5 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1300 m.

Saturday

Mix of sun and cloud with 0 to 5 cm of snow. 20 km/h northwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche danger is expected to increase throughout the day.
  • Avoid freshly wind-loaded terrain features.
  • Dial back your terrain choices if you are seeing more than 20 cm of new snow.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Wind Slabs

Fresh wind slabs will form quickly Thursday afternoon as 15 to 25 cm of snow falls with strong to extreme southerly wind.

Aspects: North, North East, East, West, North West.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Cornices

Cornices can be large and fragile this time of year. Keep a safe distance when traveling on or below ridges.

Aspects: North, North East, East, West, North West.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 2.5