Bulletin d’avalanche

Waterton Lakes

Mar 19 – 21, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

After several days of high freezing levels, temperatures are finally forecast to drop with new snow and a return to winter. As the snow comes in on Thursday, pay attention to how this snow bonds to the new crust.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3.5

    As a new surface crust forms with dropping temperatures, this layer will become less triggerable.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    As new snow falls on Thursday, expect a building storm slab problem.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Tuesday will likely be the last day of reactivity for this problem as temperatures are forecast to cool from Wednesday onwards.

Confidence

Moderate

Avalanche Summary

Numerous natural wet loose avalanches have been observed on all aspects at all elevations this week.

Snowpack Summary

Previous moist snow all elevations, all aspects, beginning to refreeze with cooler temperatures. The Feb 3rd crust/facet persistent weak layer is buried 60-120 cm deep. Below this, the snowpack consists of a mixture of settled snow and crust/facet layers to ground. Snowpack depths between 80 - 250 cm.

Weather Summary

Tues

Cloud increasing over the day, light winds with freezing level lowering to 2100 m. Alpine high of +5°C.

Wed

Flurries through the day with light winds. Freezing level lowering to 1400 m.

Thurs

Snowing with up to 20 cm accumulation by the end of the day. Freezing level valley bottom.

For more info: Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Closely monitor how the new snow is bonding to the crust.

Régions couvertes