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Avalanche Forecast

Archived

Dec 24th, 2024–Dec 25th, 2024

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

Regions

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

Seeking out sheltered snow at lower elevations should tie in well with short-distance trip plans during some of the darkest days of the year.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported in the region.

Observations have been limited. Please consider sharing your observations through the Mountain Information Network.

Snowpack Summary

Ongoing light snowfall and southerly wind has likely formed deeper deposits on northerly aspects and scoured or pressed south facing slopes.

10 to 30 cm of recent snow now sits above a firm, supportive crust that extends up to 1500 m. A recent MIN report describes well-preserved surface hoar sitting on this crust in the Powder Valley. This setup is worth investigating throughout the region as slabs that form over this grain could be surprisingly touchy.

The remainder of the snowpack has no layers of concern. Snowpack depths range from about 70 to 180 cm.

Weather Summary

Tuesday night

Mostly cloudy with up to 5 cm of new snow. 30 to 40 km/h south ridgetop wind. Treeline temperature -6 °C.

Wednesday

Mostly cloudy with less than 5 cm of new snow. 30 to 40 km/h east ridgetop wind. Treeline temperature -7 °C.

Thursday

Mostly cloudy with around 5 cm of new snow. 50 to 70 km/h southeast ridgetop wind. Treeline temperature -5 °C.

Friday

Mostly cloudy with a trace of new snow. 15 to 30 km/h south ridgetop wind. Treeline temperature -5 °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 sheltered terrain where new snow hasn't been affected by wind.

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.