Bulletin d’avalanche

Blue River

Jan 15 – 16, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Large natural and rider triggered avalanches are still a concern. Be mindful of large slopes overhead and transitions to wind affected snow.

Problèmes avalancheux

  • Wind Slabs

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

    Wind slabs will be more reactive where surface hoar is preserved (think sheltered openings at mid elevations).

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3.5

    Basal facets remain a real concern in steep, rocky terrain and other alpine features with thin-to-thick snowpack transitions. Continued avalanche activity tells us this problem is still lurking out there.

Confidence

Moderate

Avalanche Summary

Last week there were continued reports of large natural and explosive controlled avalanches to size 3 in the alpine and treeline. These reports have started to tapper off and there have been no new avalanches reported this weekend.

Keep in mind as natural activity tapers off rider triggered avalanches remain possible.

Snowpack Summary

Roughly 50-80 cm of soft snow is on the surface in sheltered areas and is wind affected in the alpine and open treeline. This snow overlies a variety of old surfaces, but sheltered terrain where it may overlie preserved surface hoar, is the most concerning. Below 1600m a crust is present beneath the storm snow.

Two additional surface hoar layers in the top 2 m of the snowpack are diminishing in importance. The deeper of the two likely has a robust crust above it, below treeline. The depth of the snowpack varies greatly throughout the region and weak basal facets are present at the base of the snowpack.

Weather Summary

Sunday Night

Clear with no new snow, north alpine wind 10-40 km/h, treeline temperature -30 °C.

Monday

Mostly sunny, variable alpine wind 10-50 km/h, treeline temperature -23 °C.

Tuesday

Mostly cloudy with 5-10 cm of snow, variable alpine wind 10-30 km/h, treeline temperature -20 °C.

Wednesday

Mostly cloudy with 5-10 cm of snow, southeast alpine wind 10-40 km/h, treeline temperature -16 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Overhead hazard may not be obvious, evaluate prior to commiting to terrain.

Régions couvertes