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Archived

Avalanche Forecast

Dec 20th, 2024–Dec 21st, 2024
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
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
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

Regions: Harrison-Fraser, North Shore, Powell River, Sasquatch, Sky Pilot, South Coast, Stave, Tetrahedron.

Keep an eye on changing conditions throughout the day and be prepared to dial back your objectives.

Storm slabs are likely to increase in size and sensitivity throughout the day.

Confidence

Moderate

Avalanche Summary

Observations have been limited in this region. We suspect that natural avalanche activity has occurred in the alpine with each storm.

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

Snowpack Summary

In the alpine, up to 30 cm of new snow may have fallen by 4 pm on the 21st. This new snow will be accompanied by moderate to strong southerly winds which will form deeper deposits on northerly aspects. A prominent crust can be found on the surface due to ongoing scouring from southerly winds.

The upper snowpack below treeline is saturated from recent rain.

Snow depths taper substantially below 1000 m.

Weather Summary

Friday NightCloudy with 1 to 3 mm of rain. 30 to 50 km/h southeast ridgetop wind. Freezing level around 2500 m.SaturdayCloudy with 15 to 30 mm of mixed precipitation. 30 to 60 km/h southeast ridgetop wind. Freezing level falling throughout the day to 1500 m.

Sunday

Cloudy with 10 to 25 mm of mixed precipitation. 50 to 80 km/h southeast ridgetop wind. Freezing level around 1700 m.

Monday

Cloudy in the morning and clearing throughout the day. Up to 30 mm of mixed precipitation by early morning. 20 to 40 km/h southerly ridgetop wind. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't let storm day fever lure you into consequential terrain.
  • Avoid lee and cross-loaded slopes in the alpine.
  • Be alert to conditions that change with aspect and elevation.

Avalanche Problems

Storm Slabs

Storm slabs will likely form throughout the day at treeline and above.

At lower elevations, where precipitation is likely to fall as rain, wet loose avalanches are possible.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2