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Archived

Avalanche Forecast

Jan 1st, 2023–Jan 2nd, 2023
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

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

New snow, mild temperatures and southerly winds have built fresh wind slabs in lees.

Use caution when transitioning into wind-affected areas. Carefully assess the bond between new slabs and the underlying surfaces.

Confidence

High

Avalanche Summary

No new avalanches have been reported recently but we suspect that wind slabs are reactive to human-triggering.

Continue to support your backcountry community and please consider submitting a MIN report.

Snowpack Summary

20-30 cm and moderate southerly winds have built deep pockets of windslab in open areas.

In the mid-pack, down around 50 to 70cm, it could be possible to find a thin layer of facets between old wind slabs. This layer recently produced sudden results in snowpack tests.

The height of the snowpack is variable. In areas lee of the prevailing wind, depths of up to 170cm can be found. At the lower elevation treeline terrain, snow depths decrease and are estimated at 60-90 cm.

Weather Summary

Sunday Night

Cloudy with snow, 10-15 cm expected at White pass. Ridgetop winds southerly 40 to 60 km/h. Low of -6 at 1500m.

Monday

Mainly cloudy with flurries, 2 to 4 cm accumulation expected at White Pass.  Ridgetop winds southerly 40 to 60 km/h. High of -5 at 1500m.

Tuesday

Cloudy with light flurries bringing a few centimeters of new snow. Southerly 40 to 60 km/h winds shift to easterly 20 km/h. High of -6 at 1500m.

Wednesday

Cloudy with light flurries, trace accumulation. Southeasterly winds 20 km/h. High of -8 at 1500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Use ridges or ribs to avoid areas of wind loaded snow.

Avalanche Problems

Wind Slabs

New storm snow and moderate to strong southerly winds have built fresh wind slabs in lees. Expect to find large, reactive wind slabs on west, north and east aspects. Stay off wind-loaded slopes until they have a chance to stabilize.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2