Bulletin d’avalanche

Sea To Sky

Mar 5 – 6, 2025Avalanche Canada
Voir sur la carte
Archivé · expiré 2 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Fresh wind slabs will form as new snow and wind bury a slippery crust.

Problèmes avalancheux

  • Wind Slabs

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

    New snow along with wind will create fresh wind slabs in exposed terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    Buried weak layers were reactive last week. Although their likelihood is decreasing, the consequences of triggering an avalanche on these layers are high.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Be mindful that deep instabilities are still present and have produced recent large avalanches.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported since last Saturday.

However, last week a flurry of very large, scary persistent slab avalanche activity was reported at alpine and treeline elevations. These avalanches are becoming less likely, but the consequences of triggering one remain high.

Snowpack Summary

As much as 20 cm of new snow now sits atop a widespread surface crust.

Beneath, 60 to 80 cm of well-settled snow sits over a weak layer of facets and surface hoar buried in mid-February. Recent snowpack tests indicate this layer may be starting to gain strength.

Another weak layer, from late January, is buried 80 to 120 cm deep. This may present as a crust on sunny slopes, sugary facets in most places, and surface hoar in sheltered spots. Large natural, remote, and human-triggered avalanches were reported on this layer last week.

Weather Summary

Tuesday Night

Cloudy with 5 to 15 cm of snow. 10 to 30 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Wednesday

Cloudy with 0 to 5 cm of snow. 0 to 20 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Thursday

Sunny. 20 to 30 km/h northeast ridgetop wind. Treeline temperature -2 °C.

Friday

Mostly sunny. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Régions couvertes