Bollettino valanghe

Crowsnest North

Dec 14 – 15, 2025Avalanche Canada
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Archiviato · scaduto 10 months ago

Pericolo valanghe

Tue
Wed
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole

In sintesi

A strong surface or near-surface crust has reduced the likelihood of triggering an avalanche, use caution anywhere the crust is absent or 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 small amounts of new snow have accumulated and a crust at or just below the surface 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 the warm and wet storm earlier this week.

If you've been out in the backcountry, please consider sharing your observations on the MIN.

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

Saturday Night
Partly cloudy. 80 km/h west ridgetop wind. Treeline temperature -1 °C.

Sunday
Mix of sun and clouds. Trace amounts of snow at treeline. 90 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Monday
Mostly cloudy. 5 to 10 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2200 m.

Tuesday
Mostly cloudy. 10 to 20 cm of snow at treeline. 60 km/h southwest ridgetop wind. Treeline temperature -2 °C.

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.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Regioni coperte