Bulletin d’avalanche

Yukon

Jan 28 – 29, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
Sans niveau
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Points saillants

New wind slabs need time to settle and bond.

Keep in mind a buried weak layer exists and there is the potential for large avalanches.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2.5

    Strong wind and new snow have built slabs in lee terrain features. Avoid wind loaded spots.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3

    The early December weak layer continues to be triggerable in shallow, thin-to-thick areas or with large loads like a cornice or avalanche.

Snowpack Summary

Around 10 cm of new snow has fallen with more expected Monday night. The storm came with strong southwest wind, building slabs on lee slopes. Expect lesser amounts of new snow the further east you go.

New snow falls on heavily wind-modified snow with some soft snow in sheltered spots.

A weak layer of facets and a crust from early December is buried 50 to 100 cm deep. This layer exists on all aspects up to around 1700 m.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported, though whumpfing continues to be reported.

It has been a while since a persistent slab avalanche has been reported, however, with new load (snow) on the weak layer it is uncertain if it will become active again.

Weather Summary

Monday Night

Mostly cloudy with up to 5 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Tuesday

A mix of sun and clouds. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Wednesday

Mostly clear skies. 10 to 30 km/h west ridgetop wind. Treeline temperature -12 °C.

Thursday

A mix of sun and clouds. 10 to 30 km/h east ridgetop wind. Treeline temperature -22 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Avoid freshly wind-loaded terrain features.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Régions couvertes