Bollettino valanghe

Crowsnest North

Dec 13 – 14, 2025Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 10 months ago

Pericolo valanghe

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

In sintesi

Although a supportive surface crust reduces the likelihood of triggering an avalanche, use caution anywhere the crust does not exist or is thin and weak.

Problemi valanghivi

  • Wind Slabs

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

    At higher elevations, where a surface crust may not exist, ongoing wind slab formation has likely occurred.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–2.5

    A crust buried deep in the snowpack has proven reactive to large loads, particularly in steep, exposed terrain. A small wind slab avalanche triggered above may be enough of a load to step down to this deeper layer.

Confidence

Moderate

Avalanche Summary

No avalanche activity has been reported since temperatures have cooled below freezing and a surface crust has formed.

A few large (size 2 to 3) avalanches occurred on Tuesday and Wednesday. These avalanches were initiated by very large triggers, such as explosives or snowcats, and failed approximately 50 to 150 cm deep on the November crust described in the snowpack summary.

Snowpack Summary

Trace amounts of new snow now overlie a widespread melt–freeze crust that is likely present on all aspects and elevations, though some high-alpine terrain may remain crust-free.

A mid-November crust is buried 50 to 100 cm deep. Beneath it, the snowpack contains several additional crust layers, and in some locations, a weak, sugary facet layer exists near the ground.

At treeline, snow depths range from roughly 50 to 100 cm, tapering off quickly at lower elevations.

Weather Summary

Friday Night
Cloudy. 1 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -5 °C.

Saturday
Cloudy. 1 cm of snow. 60 km/h west ridgetop wind. Treeline temperature -3 °C.

Sunday
Mix of sun and clouds. 1 to 3 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Monday
Mostly cloudy. 2 to 5 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.



More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Regioni coperte