Bulletin d’avalanche

Northwest Inland

Dec 16 – 17, 2025Avalanche Canada
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Archivé · expiré 10 months ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible

Points saillants

Take a cautious approach.

Use small low consequence terrain to investigate how the new snow has bonded to the old surface and back down from terrain if you encounter signs of instability.

Problèmes avalancheux

  • Persistent Slabs

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

    At 60 to 100 cm deep, a weak layer of surface hoar is at prime depth for rider triggers to produce large avalanches. It can be most likely triggered on steep roll-overs in wind-sheltered terrain around treeline.

  • Storm Slabs

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

    Storm slabs will continue to be reactive to riders, especially in wind-loaded leeward terrain features at upper elevations.

Confidence

Low

Avalanche Summary

Observations have been limited but reports of large (size 2) natural avalanches that happened during the weekends storm have been a small glimpse into the natural avalanche cycle that happened over the weekend and into Monday.

Small (size 1) human triggered avalanches have been reported in the region as well.

If you are getting out in the backcountry, consider sharing your observations on the Mountain Information Network (MIN)!

Snowpack Summary

20 to 40 cm of snow fell with strong wind this past weekend in places this will be capped by a thin rain crust.

In wind-sheltered areas around treeline, a couple of weak layers of surface hoar are buried 60 to 100 cm deep. These were reactive in snowpack tests last week, but so far we haven't seen evidence of avalanche activity on them.

The mid snowpack contains a crust with small facets above it, but does not present a problem at this time.

The snowpack is around 150 cm deep at treeline, tapering quickly with elevation.

Weather Summary

Monday Night
Mostly cloudy. 5 cm of new snow. 30 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 500 m.

Tuesday
Mostly cloudy. 5 to 10 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Wednesday
Mostly cloudy. 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Thursday
Mostly cloudy. 5 to 10 cm of snow. 30 km/h south ridgetop wind. Treeline high temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • It's a good day to make conservative terrain choices.
  • Be aware of the potential for large avalanches due to buried surface hoar.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.

Régions couvertes