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Archived

Avalanche Forecast

Dec 20th, 2019–Dec 21st, 2019
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
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

Regions: South Coast.

A substantial amount of snow fell across the region on Thursday and Friday. Conservative decision-making will be essential until this snow stabilizes.

Confidence

Moderate - Uncertainty is due to the track & intensity of the incoming weather system.

Weather Forecast

FRIDAY NIGHT: Cloudy with light snowfall, accumulation 1 to 3 cm, moderate southwest wind, treeline temperature -1 C, freezing level 1100 m.

SATURDAY: Cloudy with light snowfall, accumulation 2 to 5 cm, light to moderate southwest wind, treeline temperature -2 C, freezing level 1000 m.

SUNDAY: Cloudy with snowfall and afternoon clearing, accumulation 10 to cm, light southeast wind, treeline temperature -1 C, freezing level 1000 m.

MONDAY: Mix of sun and cloud, light west wind, treeline temperature -4 C, freezing level 500 m.

Avalanche Summary

A natural avalanche cycle likely occurred during the storm on Thursday and Friday, particularly at higher elevations and where smooth ground exists. A few skier-triggered avalanches were reported on Thursday, where the ground was smooth.

Snowpack Summary

Around 50 to 100 cm of snow fell in the past few days. Above around 1000 m, all of this likely fell as snow whereas rain has likely soaked the snow at lower elevations. Nonetheless, this substantial amount of new snow will require a few days to stabilize.

Terrain and Travel

  • Make conservative terrain choices and avoid overhead hazard.
  • Choose gentle slopes without steep terrain above.

Avalanche Problems

Storm Slabs

Around 50 to 100 cm of snow fell in the region in the past few days. This snow will require time to stabilize. Human-triggered avalanches will remain likely to occur on Saturday.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5