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Avalanche Forecast

Archived

Jan 5th, 2023–Jan 6th, 2023

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

Be careful in steep alpine terrain where wind slab avalanches could be triggered.

Confidence

Moderate

Avalanche Summary

A few natural wind slab avalanches have been reported on north and east aspects since the weekend. Most of them have been small (size 1), although the AvCan field team did see one larger (size 2) wind slab that likely occurred on Monday (photos here).

Snowpack Summary

30 to 40 cm of low density snow can still be found in wind sheltered terrain, while exposed alpine terrain has likely been impacted by strong southerly winds. Recent snow is well bonded to underlying layers, with the possible exception of steep wind-loaded slopes. Snow depths at White Pass are around 100 cm in sheltered areas and closer to 200 cm on wind-loaded slopes.

Weather Summary

Thursday night

Partly cloudy, no precipitation, 20 to 30 km/h wind from the southeast, treeline temperatures drop to -15 °C.

Friday

Cloudy with light flurries bringing trace amounts of snow in the afternoon, 30 to 40 km/h wind from the south, treeline temperatures around -8 °C.

Saturday

Cloudy, scattered flurries with up to 5 cm of new snow, 20 to 40 km/h wind from the southeast, treeline temperatures around -6 °C.

Sunday

Morning flurries with 5 to 10 cm of snow, clearing in the afternoon, 30 to 50 km/h wind from the south, treeline temperatures around -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.
  • Use ridges or ribs to avoid areas of wind loaded snow.

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.