Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Apr 17th, 2025–Apr 18th, 2025

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, 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, Haines Pass.

Avoid wind loaded terrain

New Wind slabs will likely be sensitive to rider traffic

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported in the past 2 days but observations have been limited.

Snowpack Summary

By Friday morning up to 20 cm of new snow may have accumulated with strong southerly wind, forming deeper deposits on north aspects. A crust may be on the surface in wind scoured terrain.

The upper and mid pack contains several crusts.

Check out this MIN report from our field team for more details.

Weather Summary

Thursday Night

Cloudy with trace to 15 cm of snow. 40 to 70 km/h south ridgetop wind. Treeline temperature -3 °C.

Friday

Mostly cloudy with 0 to 5 cm of snow. 30 to 60 km/h south ridgetop wind. Treeline temperature -2 °C.

Saturday

Mostly cloudy with 0 to 5 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Sunday

Mix of sun and cloud with trace amounts of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Avoid freshly wind-loaded terrain 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.