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Avalanche Forecast

Archived

Feb 15th, 2024–Feb 16th, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

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

Isolated pockets of stiff wind slab may exist, especially on wind sheltered slopes where buried surface hoar exists. Assess before dropping into your line.

Confidence

Moderate

Avalanche Summary

A size 2 natural slab avalanche was reported on Thursday but the avalanche likely occurred on Wednesday. Click on the picture for more details.

Snowpack Summary

Variable surface conditions exist at all elevations. New surface hoar has formed at treeline and below in sheltered terrain. South facing slopes has a mix of scouring, wind hammered surface snow, a crust and potentially moist snow in the afternoon. Soft snow can still be found on sheltered north facing terrain.

A layer of surface hoar may be found down 20 to 60 cm in north facing, sheltered terrain. It may be an isolated problem at the moment but good to try to get some observations or test suspect slopes before jumping into your line.

A thick melt-freeze crust is found down 50 to 100 cm below 1500 m. this layer is not currently a concern.

Weather Summary

Thursday Night

Clear skies. 5 to 20 km/h ridgetop wind from the southeast. Above freezing layer above 1500 m.

Friday

Sunny. 15 to 30 km/h easterly ridgetop wind. Treeline temperature -3°C. Above freezing layer above 1500 m.

Saturday

Sunny with cloudy periods. 15 to 30 km/h southerly ridgetop wind. Possible temperature inversion lingers, and treeline temperature -4°C and colder temperatures below.

Sunday

Cloudy. 5 to 10 km/h southerly ridgetop wind. Treeline temperatures near -8°C and colder temperatures below.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Carefully evaluate steep lines for wind slabs.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.