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Avalanche Forecast

Archived

Mar 17th, 2026–Mar 18th, 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.
Below Treeline
Below Threshold.

Regions

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

Lingering wind slabs may be possible to human trigger on lee features.

Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Confidence

Moderate

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

Avalanche Summary

No new avalanches were reported on Monday. However, observations in this region are very limited.

If you head out into the backcountry, let us know what you're seeing by submitting a MIN report.

Snowpack Summary

Cornices are large and looming. Avoid traveling underneath them.

Up to 10 cm of new snow overlies heavily wind-affected surfaces in open areas at all elevations. Up to 50 cm of snow can be found in sheltered areas.

A mid-February crust or facet layer can be found 50 to 70 cm down, and the late January crust/surface hoar layer is buried 50 to 100 cm down. These layers have shown no recent reactivity.

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

Weather Summary

Tuesday Night
Mostly cloudy. 0 to 5 cm of snow. 20 km/h south ridgetop wind. Treeline temperature -14 °C.

Wednesday
Mostly cloudy. 0 to 10 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -14 °C.

Thursday
Mostly cloudy. 0 to 5 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -11 °C.

Friday
Mix of sun and clouds. 0 to 5 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Use ridges or ribs to avoid areas of wind-loaded snow.
  • Wind slabs are most reactive during their formation.

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.