Bulletin d’avalanche

Waterton Lakes

Avalanche Canada
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Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
Périmé — ce bulletin a expiré 5 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Friday night we are forecasted to have temperatures well above freezing, this could wake up the persistent slab problems and increase the likelihood of wet loose avalanches on Saturday.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–2.5

    On shaded slopes in the alpine, facets were observed above a thick crust with a slab on top. Overnight freezing has decreased slab sensitivity. Friday night temperatures are forecasted to be well above freezing and this layer could wake up again.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–1.5

    Friday night is forecasted to be well above freezing into the alpine. The trigger-ability of this problem will be increased on Saturday on steep slopes.

Confidence

Moderate

  • We are uncertain about alpine conditions due to limited field observations.

Avalanche Summary

Numerous wet loose avalanches up to size 2 and one persistent slab avalanche (size 2.5) were observed over the past 5 days.

Snowpack Summary

Surface snow is currently in a melt‑freeze cycle, becoming moist during the day and refreezing overnight, and rests on a thick crust. On north‑facing alpine slopes, facets persist on this crust with a slab above. The mid‑ and lower snowpack are well settled with no notable weak layers.

Weather Summary

Thursday

Sunny. Alpine Low of -6 °C, High of 3 °C. SW wind to 20 km/h. Freezing level of 2400 m.

Friday

Sunny with cloudy periods. Alpine Low of -3 °C, High of 9 °C. SW wind light to 15 km/h. Freezing level of 3200 m.

Saturday

A mix of sun and cloud. Alpine Low of 5 °C, High of 11 °C. SW wind gusting to 30 km/h. Freezing level of 3200 m.

Current weather forecast: Mountain Weather Forecast

Terrain and Travel Advice

  • Rocks will heat up with daytime warming and may become trigger points for loose wet avalanches.
  • Be aware of the potential for large avalanches due to buried weak layers.

Régions couvertes