Bulletin d’avalanche

Northwest Inland

Dec 13 – 14, 2023Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

The current snowpack is complex, with multiple buried weak layers of concern, despite its generally shallow nature.

Problèmes avalancheux

  • Wind Slabs

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

    New snow and wind Wednesday will increase the size and reactivity of wind slabs at higher elevations.

  • Persistent Slabs

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

    Buried layers of large surface hoar crystals remain problematic. Surface hoar is most likely to be well preserved at treeline but should remain a concern at all elevations.

Confidence

Moderate

Avalanche Summary

No recent avalanches have been reported in the region.

If you do go into the backcountry, consider submitting a Mountain Information Network report.

Snowpack Summary

Widespread wind affected surfaces at higher elevations with roughly 30 cm of recent snow being redistributed by strong alpine winds. This new snow overlies a weak, feathery layer of surface hoar at 1200 m and above. Below this elevation, it overlies a crust.

Another surface hoar layer is down 40 to 60 cm. This layer may exist at all aspects and elevations.

In general, the snowpack is still shallow for this time of year with snowpack depths at treeline ranging from 50 to 100 cm. Early season hazards are still a concern.

Weather Summary

Tuesday Night

Mostly cloudy with 2 to 10 cm of snow, south alpine winds 60 to 80 km/h, treeline temperature -4 °C.

Wednesday

Cloudy with 2 to 10 cm of snow, southwest alpine winds 60 to 80 km/h, treeline temperature -6 °C.

Thursday

Mix of sun and cloud with no precipitation, southwest alpine winds 30 to 50 km/h, treeline temperature -6 °C.

Friday

Mostly cloudy with no precipitation, southwest alpine winds 40 to 70 km/h, treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
  • Wind slabs are most reactive during their formation.
  • Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.

Régions couvertes