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Archived

Avalanche Forecast

Mar 2nd, 2025–Mar 3rd, 2025
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
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
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: Haines Pass, Tutshi, Wheaton, White Pass East, White Pass West, Yukon.

Wind slabs are expected to remain sensitive to human triggering. Use extra caution in wind-exposed terrain.

Confidence

Moderate

Avalanche Summary

On Saturday, several wind slab avalanches (size 1.5) and a storm slab avalanche (size 2.5) were reported in the Big Kahuna area.

Snowpack Summary

30 cm of snow from last week's storm is being redistributed by strong southerly wind. The new snow is building deep drifts of wind-deposited snow on lee and cross-loaded slopes, forming fresh wind slabs. These sit over firm, wind-affected surfaces in exposed areas, faceted snow in sheltered terrain, and a crust on steep solar aspects. A poor bond to these interfaces may exist.

A weak layer of facets and a crust from early December is buried 60 to 150 cm deep. This layer exists on all aspects up to 1750 m. This layer has not been active in producing avalanches or test results in several weeks and is generally not a concern at this time.

At the highway elevation, the snow depth is 120 cm, and in the alpine exceeds 200 cm.

Weather Summary

Sunday Night

Cloudy. 20 to 40 km/h south ridgetop wind. Treeline temperature -5 °C.

Monday

Mix of sun and clouds. 10 to 20 km/h south ridgetop wind. Treeline temperature -6 °C..

Tuesday

A mix of sun and cloud. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C.

Wednesday

A mix of sun and cloud. 10 to 25 km/h southeast ridgetop wind. Treeline temperature -4 °C.

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.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.

Avalanche Problems

Wind Slabs

Human-triggered wind slabs remain possible. These wind slabs may sit over a weak interface in some areas, which may keep them reactive for longer than normal.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5