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Avalanche Forecast

Archived

Dec 30th, 2023–Dec 31st, 2023

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.

Recent snow and wind will continue to promote wind slab formation.

Confidence

Moderate

Avalanche Summary

No new avalanche activity has been reported in the past few days.

If you head into the backcountry please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

15 to 25 cm of new snow has fallen in the past few days. This has been redistributed by primarily southwest wind.

The mid and lower snowpack is reported to be well settled, with a thick, well-bonded crust approximately 30 to 50 cm above the ground at elevations below 1200 m. Snow depth ranges from 80 to 200 cm across the region.

Of note, a layer of surface hoar was found in the Halcyon area on Dec 28, check out their MIN

Weather Summary

Saturday Night

Cloudy with 2 to 4 cm of snow. Southwest wind, 25-40 km/h. Treeline temperature rising to -8 °C.

Sunday

Mainly cloudy with a trace of new snow. Southwest wind, 15-30 km/h. Treeline temperature -5 °C.

Monday

Mix of sun and cloud. Southeast wind, 10 to 20 km/h. Treeline temperature -12 °C.

Tuesday

Cloudy with sunny breaks. Southeast wind, 15 to 30 km/h. Treeline temperature -11 °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.
  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Approach steep open slopes at and below treeline cautiously, buried surface hoar may exist.

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.