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Avalanche Forecast

Archived

Mar 9th, 2026–Mar 10th, 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.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

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

Wind slabs remain possible to human-trigger.

Actively look for signs of instability and identify wind slabs, listen for drum like sounds and hollow sounding snow.

Confidence

Moderate

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

Avalanche Summary

On Sunday, a large naturally triggered size 2 avalanche was reported in the Halcyon area.

Going forward, wind slabs remain possible to human trigger.

Snowpack Summary

Heavily wind affected surfaces in all open terrain features, and soft settling snow in sheltered terrain. Outflow winds forecast for Tuesday may build wind slabs at lower elevations. This MIN describes the surface conditions.

A mid-February crust or facet layer sits 50 to 70 cm deep, and is more prominent on north aspects in White pass and can found on all aspects in the Haines pass. The late January crust is buried 50 to 100 cm deep below 1350 m, with surface hoar above on sheltered north to east aspects.

Facets or depth hoar exist at the base of the snowpack and may be a concern in the inland side of the region, where the snowpack is generally shallower.

Weather Summary

Monday Night
Partly cloudy. 1 cm of snow. 10 km/h east ridgetop wind. Treeline temperature -18 °C.

Tuesday
Mix of sun and clouds. 10 km/h east ridgetop wind. Treeline temperature -19 °C.

Wednesday
Mix of sun and clouds. 1 cm of snow. 10 km/h east ridgetop wind. Treeline temperature -20 °C.

Thursday
Mostly sunny. 10 km/h southeast ridgetop wind. Treeline temperature -21 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.
  • 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

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.

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.