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Avalanche Forecast

Archived

Apr 11th, 2026–Apr 12th, 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

Haines Pass, Chilkat Pass.

While the transition to a spring snowpack has begun, both wind slabs and persistent weak layers remain a concern in steep alpine terrain.

Confidence

Moderate

  • We are uncertain about how the timing or intensity of solar radiation will affect the snowpack.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

No new avalanche activity has been reported.

Snowpack Summary

Recent light snowfall has been redistributed by variable winds at higher elevations.

South-facing slopes likely have a strong, supportive crust in the morning, which will soften throughout the day with daytime warming and sun.

A persistent weak layer of facets and crust is buried 80 to 150 cm deep in alpine terrain. The greatest concern for triggering comes from large loads, such as cornice falls, or from human triggering in areas where the snowpack transitions from thin to thick.

Check out this MIN report from the AvCan Yukon field team for a detailed conditions update.

Weather Summary

Saturday Night
Clear skies. 10 km/h west ridgetop wind. Treeline temperature -2 °C.

Sunday
Mix of sun and clouds. 30 km/h south ridgetop wind. Treeline temperature -4 °C.

Monday
Mostly cloudy. 3 to 5 cm of snow. 20 km/h south ridgetop wind. Treeline temperature -5 °C.

Tuesday
Mix of sun and clouds. 1 to 2 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -6 °C.

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.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Be aware of the potential for large, destructive avalanches due to deeply buried weak layers.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.