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Avalanche Forecast

Archived

Jan 17th, 2023–Jan 18th, 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 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.

New wind slab formation is possible Tuesday overnight with a forecast for moderate to strong winds in the alpine. Continually assess conditions as you travel and use a cautious approach in wind-exposed terrain.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported over the past few days.

New wind slab formation is possible Tuesday overnight and may be reactive to human triggering on Wednesday.

Snowpack Summary

On Tuesday, the Avalanche Canada field team was reporting a rime crust on the surface and increasing wind speeds at the end of the day. If the wind speed continues to increase Tuesday night, new wind slab formation should be expected on Wednesday at higher elevations.

Snow depth at White Pass is around 100 cm in sheltered areas and up to 200 cm on wind-loaded slopes. Shallower snowpack areas (< 1 m) are reported to be quite facetted and loose.

Weather Summary

Tuesday night

Flurries up to around 5 cm, moderate to strong S wind, treeline low around 10 °C.

Wednesday

Mainly cloudy with sunny breaks and a chance of flurries, light to moderate SE-S winds, treeline high around -8 °C.

Wednesday night and Thursday

Mainly cloudy with light snowfall 5-10 cm, moderate to strong S-SW winds, treeline high around -4 °C.

Friday

Cloudy with light snowfall 5-10 cm, strong SE-S winds, treeline high around 0 °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.

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.