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Archived

Avalanche Forecast

Jan 31st, 2024–Feb 1st, 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
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.

Start with small slopes, and watch for signs of instability like shooting cracks as you move into wind-exposed terrain.

Be cautious as you gather information after this warm, stormy period.

Confidence

Low

Avalanche Summary

No new avalanches were reported on Wednesday.

Looking forward to Thursday, we expect that human-triggered avalanches will be likely anywhere that wind has redistributed dry snow into thicker, more reactive slabs, potentially over a hard, slippery crust. North and east-facing features are currently the most likely to be wind-loaded.

Snowpack Summary

Strong southerly alpine winds have likely formed reactive slabs at treeline and above on north and east-facing terrain.

Storm snow totals around 35-50 cm by the end of the day Tuesday, with uncertain freezing levels in White Pass.

Freezing levels were up to 1700 m over the weekend (possibly only 1200 m in White Pass). In the Wheaton area on Tuesday, our field team found a strong surface crust up to 1200 m.

Weather Summary

Wednesday Night

Mostly cloudy. 2-5 cm of snow expected. Light to moderate northeast ridgetop wind. Treeline temperature around -15°C.

Thursday

Mostly cloudy. 1-3 cm of snow expected. Light southeast ridgetop wind, switching to southwest by the afternoon. Treeline low around -20 °C.

Friday

Mostly cloudy, possibly clearing in the afternoon. Trace of snow expected. Light west ridgetop wind. Treeline temperature around -25 °C.

Saturday

Partly cloudy. No new snow expected. Moderate southwest ridgetop wind. Treeline temperature around -25 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • 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

Moderate to strong southwest wind likely redistributed recent storm snow into reactive wind slabs on north and east-facing terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5