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Archived

Avalanche Forecast

Dec 16th, 2023–Dec 17th, 2023
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Tutshi, Wheaton, White Pass East, White Pass West, Yukon.

Make conservative terrain choices as our region is hit with another storm.

Monitor how new snow bonds to old surfaces.

Confidence

Moderate

Avalanche Summary

No new avalanche activity reported since Wednesday. Incoming storm snow and winds are expected to increase the likelihood of human and natural-caused avalanches.

Check out Wednesday's report from our Avalanche Canada field team.

If you do go into the backcountry, consider submitting a Mountain Information Network report.

Snowpack Summary

New snow will be falling on wind stripped south-facing slopes and deep deposits of wind-loaded snow on north and north-facing aspects and lee features.

There may be stiff wind slab underneath new fluffy snow, be sure to dig and investigate. Limited field observations mean we do not know if the new snow is bonding well to the old snow surface.

Treeline snow depth ranges from 100 to 120 cm, however, snow depths overall remain highly variable.

Weather Summary

Saturday Night

Mostly cloudy, 5 to 10 cm accumulation, ridgetop winds southwest 55 to 65 km/h, treeline temperature - 6 °C. 

Sunday

Cloudy, 10 to 20 cm accumulation, ridgetop southwest winds 45 km/h gusting to 75, treeline temperature -3 °C.

Monday

Partly cloudy, trace accumulation, ridgetop winds variable 10 km/h, treeline temperature -8 °C. 

Tuesday

Sunny with cloudy periods, no accumulation, ridgetop winds south 15 km/h treeline temperature -12 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind loaded terrain features.
  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
  • Watch for fresh storm slabs building throughout the day.

Avalanche Problems

Wind Slabs

Snow starting Saturday night continues throughout the day on Sunday. Accompanied winds will transport the new snow and develop reactive wind slabs.

Reactive storm slabs should be expected in sheltered areas.

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

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1.5 - 2.5