Bollettino valanghe

Northwest Inland

Jan 14 – 15, 2025Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 2 years ago

Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

The best riding will be found in sheltered terrain above 1300 m, where snow isn't wind-affected or crusty.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Strong ridgetop winds have been building wind slabs. Use extra caution on leeward slopes.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3

    A widespread crust with weak facets overtop is buried 40-80 cm deep. While this layer exists on all aspects, it's most likely to be triggered by a heavy load on wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

On Saturday a wind slab was observed near Hudson Bay mountain. Click photo below for details.

Friday, several wind slabs sized 1 to 2 were observed across the region.

Wednesday, a few wind slab avalanches size 1.5 to 2 were reported on east aspects in the alpine. Some were cornice-triggered, and one was noted to have stepped down the persistent weak layer.

Natural avalanche activity has likely subsided, but we expect human-triggering to remain possible.

Snowpack Summary

Several days of strong to extreme westerly through northwesterly winds have scoured snow on windward faces and built thick wind slabs on lee slopes. These slabs are slowly bonding.

The snow surface on south-facing slopes and areas below 1200–1300 m is expected to be crusty.

A persistent weak layer composed of facets overlying a crust is buried 40 to 80 cm deep. A couple of recent wind slabs have stepped down to this layer. It has been stubborn to unreactive in recent snowpack tests, but may remain possible to trigger in isolated areas.

Weather Summary

Monday Night

Cloudy with 1 to 5 cm of snow. 50 to 70 km/h west ridgetop wind. Treeline temperature -3 °C.

Tuesday

Mostly cloudy with 5 to 15 cm of snow. 80 to 90 km/h southwest ridgetop wind. Treeline temperature 0 °C.

Wednesday

Cloudy with 5 to 10 cm of snow. 40 to 50 km/h west ridgetop wind. Treeline temperature -3 °C.

Thursday

Cloudy with 1 to 5 cm of snow. 40 to 50 km/h northwest ridgetop wind. Treeline temperature -9 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.

Regioni coperte