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Archived

Avalanche Forecast

Feb 1st, 2024–Feb 2nd, 2024
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
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

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

Avoid wind slabs and find good quality riding up high on planar, wind-sheltered alpine slopes like glaciers and low angle gullies.

Confidence

Moderate

Avalanche Summary

Over the last 2 days our field team did not observe any new avalanche activity but observed evidence of the natural cycle that occurred during the warm storm earlier in the week. In White Pass, up to size 2 avalanches were widespread at treeline and isolated in the alpine and in the Wheaton area widespread at all elevations, up to size 2.5.

Snowpack Summary

At upper elevations, 10-40 cm of recent dry snow has been redistributed by strong southerly winds, shifting northerly as of Thursday. This recent snow has been observed to be bonding well to an underlying crust, reaching up to 1500 m in White Pass and 1200 m in the Wheaton area.

Weather Summary

Thursday night

Partly cloudy with a trace of new snow. Light southeast ridgetop wind, switching to southwest by the afternoon. Treeline low around -20 °C.

Friday

A trace of snow in the morning then clearing to a mix of sun and cloud. Light northwest ridgetop wind. Treeline temperature around -25 °C.

Saturday

A mix of sun and cloud. Southwest ridgetop wind 40-50 km/h. Treeline temperature around -25 °C.

Sunday

Mostly cloudy with a trace of snow. Southwest ridgetop wind 50-60 km/h. Treeline temperature warming up to -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind loaded terrain features.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

Avalanche Problems

Wind Slabs

Recent winds have shifted from southwest to north, redistributing recent storm snow into reactive wind slabs on a variety of aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2