Bulletin d’avalanche

Jasper

Mar 25 – 26, 2025Avalanche Canada
Voir sur la carte
Archivé · expiré 2 years ago

Danger d’avalanche

Thu
Fri
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
Ouvrir la carte complète

Points saillants

The snowpack remains susceptible to human-triggered slides. Localized precip, wind, and warm temperatures will exacerbate the avalanche hazard.

Problèmes avalancheux

  • Wind Slabs

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

    If triggered, expect to initiate lower weaker persistent layers creating a large avalanche.

  • Persistent Slabs

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

    This avalanche problem is associated with a weak facet and crust layer buried at the end of January approximately 70cm down in sheltered areas. This includes a crust layer formed in early March below the recent storm snow which is prominent on solar aspects.

  • Loose Wet

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

    Most active from steep rocky terrain, may overload and trigger the slopes below.

Confidence

Moderate

Avalanche Summary

The field teams on the Parkway and Maligne report no new activity. Limited visibility above TL.

Of note, reports of large whumphs while traveling on skis are a good indication that the snowpack is still primed for triggering.

Snowpack Summary

In the Alpine: Wind slabs continue to build in lee features throughout the region. These slabs will overload the weak persistent slab and continue to produce large avalanches in the region.

Treeline and below: the 70-90 cm from earlier in March has settled into a supportive midpack. This bridges a complicated and reactive deep persistent weakness. Where the snowpack is shallow, the bridging is not strong and triggering a large avalanche is very possible.

Weather Summary

Overnight: Clear with Cloudy periods. Isolated precip. Low: -3°c, Mostly light SW winds.

Wednesday: Mix of sun and clouds. Alpine temp: 2 °c. Mostly light S-ly Freezing level: 2600m

Thursday: Flurries, accumulation: 10cm. Temps: Low -7°c, High 1°c. Freezing level: 2200m

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Remote triggering is a concern; avoid terrain where triggering overhead slopes is possible.

Régions couvertes