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Avalanche Forecast

Archived

Apr 5th, 2026–Apr 6th, 2026

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

Regions

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

There is variability across this region, but one similarity is the presence of a persistent weak layer.

Be patient. Continually assess as you travel, and choose conservative terrain.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.

Avalanche Summary

No new avalanches have been reported.

Aerial observations in White Pass on Thursday included several recent natural persistent slabs to size 2.5, mainly on southeast to southwest aspects.

Snowpack Summary

Roughly 10 cm of snow has incrementally accumulated over a layer of surface hoar that has been growing in the high alpine, although southerly winds may have damaged these unwanted grains on wind-exposed slopes.

New snow has otherwise buried hard, pressed surfaces, wind slab, and sastrugi in exposed terrain. A sun crust should be found on or near the surface of sun-exposed slopes. Forecast winds will lend to these hard surfaces predominating once again. Aside from these less desirable surface conditions, we’ve received reports of good riding on faceted northeast-facing slopes and sheltered terrain at lower elevations.

The lower snowpack is faceted and generally weak, particularly in shallow areas.

Weather Summary

Sunday Night
Mostly cloudy. 2 to 5 cm of snow. 30 km/h east ridgetop wind. Treeline temperature -4 °C.

Monday
Mostly cloudy. 1 cm of snow. 10 km/h north ridgetop wind. Treeline temperature -4 °C.

Tuesday
Mostly cloudy. 2 to 3 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -4 °C.

Wednesday
Mostly cloudy. 1 to 4 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Watch for areas of hard wind slab on alpine features.

Problems

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.

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.