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Avalanche Forecast

Archived

Apr 17th, 2026–Apr 18th, 2026

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

Regions

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

Wind slabs continue to form in leeward terrain.

Pockets of buried surface hoar on north-facing slopes immediately below ridge crests could create surprisingly touchy conditions.

Confidence

Moderate

  • We are uncertain due to a highly variable snowpack.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

No new avalanche activity has been reported since Wednesday, when numerous loose wet or wet slab avalanches were reported on sun-exposed slopes near White Pass.

Last weekend, a wind slab avalanche was remotely triggered and surprisingly large due to surface hoar buried just below the recently formed wind slabs.

Snowpack Summary

A variety of surfaces exist across aspects and elevations. Firm, supportive crusts are present at lower elevations and on sun-exposed slopes.

In higher-elevation terrain sheltered from sun and wind, 10 to 15 cm of recent snow overlies a mix of older, wind-affected surfaces.

A weak layer of surface hoar may persist 30 to 60 cm below the surface in northerly alpine terrain.

The lower snowpack remains faceted and generally weak, especially in shallow snowpack areas.

Weather Summary

Friday Night
Mostly cloudy. 1 to 4 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Saturday
Mostly cloudy. 1 to 3 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Sunday
Mostly cloudy. 3 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -2 °C.

Monday
Mostly cloudy. 3 to 10 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.