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Avalanche Forecast

Archived

Apr 24th, 2026–Apr 27th, 2026

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
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, Haines Pass, Chilkat Pass.

All melt, no freeze conditions are possible on Saturday. By Sunday morning, falling freezing levels should result in a strong refreeze and strengthen the upper snowpack.

Confidence

Low

  • We are uncertain about how the timing or intensity of warming will affect the snowpack.
  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

On Wednesday in White Pass, numerous recent natural wind slab avalanches up to size 2 were observed. A natural cornice failure (size 2.5) was also noted along a northeast ridgeline. Additionally, a larger avalanche (size 3) was reported on an east aspect, where a wind slab stepped down to a buried surface hoar layer.

If you’re heading into the backcountry, please consider submitting a MIN report—observations are particularly limited this time of year.

Snowpack Summary

Overall, expect typical spring conditions. Snow surfaces will soften through the day with warming temperatures and sun exposure, then refreeze overnight, leading to firm, crusty conditions in the morning. Higher-elevation, north-facing terrain may continue to hold pockets of dry snow.

Elevated freezing levels on Friday night may limit the overnight refreeze (especially at lower elevations), resulting in a weakened upper snowpack by Saturday morning.

The lower snowpack remains weak and faceted, particularly in areas with a shallow overall snowpack. Although unlikely, these layers could become more reactive during periods of above-freezing temperatures and/or intense solar radiation.

Weather Summary

Friday Night
Partly cloudy. 20 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2400 m.

Saturday
Mostly sunny. 10 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2300 m.

Sunday
Mix of sun and clouds. 20 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1300 m.

Monday
Mix of sun and clouds. Trace amounts of snow. 10 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Avalanche danger will increase as the surface crust breaks down.
  • Wind slabs are isolated, but may remain reactive.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
  • Avoid areas with a thin or variable snowpack.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.