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Archived

Avalanche Forecast

Feb 27th, 2025–Feb 28th, 2025
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
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.

Fresh storm slabs will likely be reactive to human triggering.

If you encounter natural avalanches, whumpfing and cracking in the snow, step back to simple low-angle terrain.

Confidence

Moderate

Avalanche Summary

Reactive storm slabs likely exist on Friday.

No persistent slab avalanches have been reported since early February.

If you are traveling in the mountains, consider posting to the MIN.

Snowpack Summary

Up to 30 cm of new snow accompanied by strong southerly wind has formed new storm slabs. Wind loading has likely formed deeper slabs on northerly facing slopes. 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

Thursday Night

Cloudy with 3 to 5 cm of snow. 40 to 80 km/h south ridgetop wind. Treeline temperature -6 °C.

Friday

Cloudy with sunny breaks and 5 to 10 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Saturday

Mix of sun and cloud with isolated flurries. 15 to 45 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Sunday

Mix of sun and cloud. 10 to 25 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.

Avalanche Problems

Storm Slabs

Fresh and reactive storm slabs exist on all aspects at upper elevations. Deeper and stiffer slabs may exist in leeward and cross-loaded terrain, especially near ridge crests and rollovers.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2