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Archived

Avalanche Forecast

Dec 30th, 2022–Dec 31st, 2022
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
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

Regions: North Shore, Sasquatch, Sky Pilot, South Coast, Stave.

As the stormy weather comes to an end, expect human-triggered avalanches to remain likely as the new snow settles into a cohesive slab.

Confidence

Moderate

Avalanche Summary

Storm snow is reportedly not bonding well to the underlying crust, causing loose avalanches in steep terrain where the new snow lacks cohesion.

Please continue to post your observations and photos to the Mountain Information Network.

Snowpack Summary

Up to 80 cm of storm snow has likely accumulated since Thursday at higher elevations. The new snow overlies a thin melt-freeze crust and a moist, saturated snowpack below.

Treeline snow depths are roughly 150 to 200 cm.

Weather Summary

Friday night

Cloudy and heavy snow, 20 to 40 cm. Moderate south winds. 0 C at treeline. Freezing levels 1000 m.

Saturday

Cloudy and snow, 5 to 10 cm. Moderate west winds. 0 C at treeline. Freezing levels 1000 m.

Sunday

Mostly cloudy, with no precipitation. Light west winds. 0 to -5 C at treeline. Freezing levels 1000 m.

Monday

Mostly sunny, with no precipitation. Moderate southerly winds. 0 C at treeline. Freezing levels 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't be too cavalier with decision making, storm slabs may remain sensitive to human triggering.
  • Closely monitor how the new snow is bonding to the old surface.
  • Expect slab conditions to change drastically as you move into wind exposed terrain.

Avalanche Problems

Storm Slabs

Storm slabs will build with the forecasted heavy snow. New snow may take some time to bond to the underlying crusts.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2.5

Loose Wet

The snowpack at lower elevations remains slurry and saturated. As the snowpack approaches its melting point it will result in a loss of cohesion.

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5