Bulletin d’avalanche

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Mar 9 – 10, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Strong southerly winds have formed fresh wind slabs in the alpine. Avoid steep north-facing terrain where triggering a wind slab is more likely.

Problèmes avalancheux

  • Wind Slabs

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

    Light new snow and elevated southwest wind should build fresh wind slabs, though limited in destructive potential. Watch for reactive pockets near ridge crests and rollovers.

  • Persistent Slabs

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

    Although activity on deeper layers has tapered, a string of persistent slabs in the recent past should keep this problem in your risk management. Use lower consequence slopes in sheltered areas where buried surface hoar may be preserved.

Confidence

High

Avalanche Summary

There has been little avalanche activity reported in the previous few days. If you do observe an avalanche, consider posting a MIN.

Looking forward, human triggering of small, fresh wind slabs and deeper, more destructive persistent weak layers remains possible.

Snowpack Summary

Light new snow amounts are beginning to bury a widespread layer of surface hoar crystals, which sit over a crust on solar aspects and low elevations.

A layer of facets, surface hoar and/or a crust formed during the February drought, are buried 30 to 50 cm deep and give easy results in snowpack tests.

Deeper in the snowpack, a weak layer of facets and a crust from early December can be found. This layer appears to be dormant but is still worth managing in thin snowpack areas in the alpine.

Weather Summary

Saturday Night

Mostly cloudy with 0 to 2 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Sunday

Cloudy. 10 to 15 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Monday

A mix of sun and cloud with 0 to 3 cm of new snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1100 m.

Tuesday

Cloudy with scattered flurries. 40 to 50 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.
  • Be aware of the potential for large avalanches due to buried weak layers.

Régions couvertes