Bollettino valanghe

North Rockies

Jan 15 – 16, 2026Avalanche Canada
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Archiviato · scaduto 9 months ago

Pericolo valanghe

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

In sintesi

Strong northwest wind may drive a wind slab problem in lee alpine terrain. They have the potential to step down to a deeper weak layer.
Avalanche danger may increase on sun-exposed slopes.

Problemi valanghivi

  • Wind Slabs

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

    Strong northwest winds may build fresh wind slabs in leeward terrain features in the alpine.

  • Persistent Slabs

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

    A crust/facet layer 50 to 170 cm deep may be triggered with large loads, like a cornice fall. Remote triggering and step-down potential continue to be a concern with this layer.

Confidence

Moderate

  • Uncertainty is due to the limited number of field observations.
  • Uncertainty is due to the fact that persistent slabs are particularly difficult to forecast.

Avalanche Summary

No new avalanches reported. We suspect natural avalanche activity occurred on Tuesday and Wednesday due to high freezing levels and rain.

Snowpack Summary

Switching winds from the northwest combined with light precipitation, may build new wind slabs on leeward slopes in the alpine. At 1600 m and below, a melt-freeze crust will exist with moist snow below. The thickness of this crust may vary with elevation.

A crust from mid December, surrounded by weak facets, is buried 50 to 170 cm deep, and may be capped by the melt-freeze crust.

In thin snowpack areas, faceted grains or depth hoar may exist at the base of the snowpack. Snowpack depths are well above average for this time of year, around 2 m at treeline.

Weather Summary

Wednesday Night
Partly cloudy. 70 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 900 m.

Thursday
Mostly sunny. 40 km/h northwest ridgetop wind. Treeline temperature -6 °C. Freezing level valley bottom.

Friday
Sunny. 40 km/h northwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1600 m.

Saturday
Sunny. 60 km/h northwest ridgetop wind. Treeline temperature 3 °C. Freezing level 3100 m.




More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid steep terrain that is rocky and thin.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Regioni coperte