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Archived

Avalanche Forecast

Dec 7th, 2024–Dec 8th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

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

Ease into terrain cautiously and tune into any signs of instability. Fresh storm slabs may be triggerable by riders.

Confidence

Moderate

Avalanche Summary

We are still awaiting reports from the storm. We suspect a natural storm slab avalanche cycle to have run during the storm. On Sunday, we can expect storm slabs to remain triggerable by riders.

If you are going out in the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

Storm totals of 30 to 70 cm are expected by Sunday morning. Any old surface layers such as facets, surface hoar or thin crusts have likely been neutralized by the rainy start to the storm. The cooling trend through the storm is also favorable for bonding.

The mid and lower snowpack is generally well settled and bonded.

Snow depths at treeline are around 100 cm near Whistler, and 70 cm in the Duffy.

Weather Summary

Saturday Night

5 to 15 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1000 m.

Sunday

Snowfall ending, clearing to a mix of sun and cloud. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -2°C. Freezing level 1200 m.

Monday

Sunny. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -2°C. Freezing level 800 m.

Tuesday

A mix of sun and cloud. 10 to 20 km/h west ridgetop wind. Treeline temperature +2°C. Freezing level 3000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Start with conservative terrain and watch for signs of instability.
  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Be especially cautious as you transition into wind-affected terrain.
  • Make observations and continually assess conditions as you travel.

Avalanche Problems

Storm Slabs

Fresh storm slabs may be triggerable by riders. Storm slabs may be most reactive in wind loaded terrain features.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5