Bulletin d’avalanche

Jasper

Mar 3 – 4, 2026Avalanche Canada
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Archivé · expiré 7 months ago

Danger d’avalanche

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

The persistent slab has potential to produce large avalanches. Consider the size of slopes and overhead hazard in your decision-making process.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–2.5

    Strong alpine winds have redistributed available snow. Wind slabs may be found lower on the slope than is typical.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1.5–3.5

    Recent snow and strong winds have built a cohesive slab over surface hoar and facets. A natural cycle up to size 3.5 has been observed on this layer.

Confidence

Moderate

  • We are uncertain about how the timing or intensity of warming will affect the snowpack.

Avalanche Summary

Many natural avalanches up to size 3.5 have been observed in the bulletin region since Feb 27. An avalanche on the East face of Whistlers Peak was observed Monday morning.

The frequency of natural avalanche activity is tapering, however slopes are still primed for human triggering.

Snowpack Summary

Up to 40 cm of new snow received this week has been redistributed by strong West winds. This sits atop the January weak layer of facets and surface hoar buried 40–60 cm deep, forming a persistent slab. Below 2000m, a thin melt-freeze crust is developing on the surface. The mid-pack is generally dense and well consolidated, with basal facets present in thinner snowpack areas.

Weather Summary

Tuesday

A mix of sun and cloud with isolated flurries will deliver 4cm of new snow.

-1°C at 2200m and freezing level at 2000m

Mostly light ridge wind gusting to 40 km/h.

Wednesday

6 cm of new snow.

Low -7 °C, High -4 °C.

Ridge wind: Southwest, 15-35 km/h.

Freezing level at 1600 m

Thursday

Cloudy with 4 cm of new snow.

Low -10 °C, High -6 °C.

Ridge wind: Southwest, 15 km/h gusting to 50 km/h.

Freezing level at valley bottom.

Terrain and Travel Advice

  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Recent strong wind means wind slabs may be found farther downslope than expected.
  • Keep in mind that human triggering may persist as natural avalanches taper off.

Régions couvertes