Bulletin d’avalanche

Purcells

Apr 15 – 16, 2025Avalanche Canada
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Archivé · expiré last year

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Persistent slab avalanches remain possible on north-facing alpine slopes, particularly where the snowpack is thin and rocky.

Problèmes avalancheux

  • Persistent Slabs

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

    It remains possible to trigger avalanches on buried weak layers, particularly where they are shallow in the snowpack and/or do not have a thick crust above them.

Confidence

Moderate

Avalanche Summary

It's been several days since any avalanche activity was reported. The last known event was a sledder-triggered slab on Friday east of Wasa (see photo).

Snowpack Summary

About 5 cm of recent snow sits above a hard melt-freeze crust on northerly alpine slopes. Elsewhere, a thick crust caps the surface. This crust will likely soften during the day and refreeze overnight.

The bottom half of the snowpack is generally weak and faceted

Lower elevations are melting rapidly.

Weather Summary

Tuesday Night

Partly cloudy. 30 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level drops from 2500 to 1500 m.

Wednesday

Mostly cloudy with 0 to 3 cm of snow. 30 km/h north ridgetop wind. Treeline temperature -4 °C.

Thursday

Sunny. 10 km/h north ridgetop wind. Treeline temperature -1 °C. Freezing level 2000 m.

Friday

Sunny. 20 km/h northwest ridgetop wind. Treeline temperature +1 °C. Freezing level 2200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Régions couvertes