Bulletin d’avalanche

North Rockies

Apr 20 – 21, 2024Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Mon
Tue
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Isolated pockets of thin wind slab may form in high leeward terrain features.

Problèmes avalancheux

  • Wind Slabs

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

    Thin pockets of wind slab are possible where wind has deposited sufficient snow into lee terrain features at upper elevations. Wind slabs may be especially reactive where they sit over a crust.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported.

Snowpack Summary

A dusting of new snow falls over a widespread melt-freeze crust on all but high north-facing alpine terrain, where dry and wind affected snow may persist.

Weather Summary

Saturday night

Increasing cloud. 30 to 50 km/h southeast ridgetop wind. Treeline temperature -1 °C. Freezing level 1600 m.

Sunday

Cloudy with up to 10 cm of snow at upper elevations. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1600 m.

Monday

Mostly cloudy with a trace of new snow. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level rising to 1800m.

Tuesday

A mix of sun and cloud. 20 to 40 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 1900m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Régions couvertes