Boletín de aludes

Lizard-Flathead

Dec 10 – 11, 2025Avalanche Canada
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Archivado · caducó 10 months ago

Peligro de aludes

Fri
Sat
Alta montaña
4 · Fuerte
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

Natural avalanches are expected with heavy wind, snow and possible rain. Avoid avalanche terrain and exposure to overhead hazards.

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    1–2.5

    torm slabs may involve moist/wet snow with possible rain, and rising freezing levels.

Confidence

Moderate

Avalanche Summary

A widespread natural cycle was observed near Fernie, to size 3 during heavy snow wind and rain on Monday night. Slabs were reactive to explosive and human triggers to size 1.5 as well.

We expect reactivity to continue as storm snow continues to accumulate, with natural avalanches most likely in areas of heavy loading with snow, wind or rain.

Snowpack Summary

By Wednesday afternoon, 20–40 cm of snow is expected, adding to the previous 50–80 cm of dense/wet storm snow. Higher elevations are likely wind-affected with deep deposits on north and east facing ridgelines. Lower elevation snow will likely be moist from rain or mixed precipitation.

A layer of faceted snow or surface hoar, and a crust from mid November is buried 70-110 cm deep. Additional crusts are present in the lower snowpack, and in some areas, weak, sugary facets exist near the ground.

Snowpack depths range from 80–150 cm and thin rapidly at lower elevations. In many areas, especially below treeline, slopes lack enough snow to cover ground roughness and produce avalanches.

Weather Summary

Tuesday Night
Partly cloudy. 4 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level 1200 m.

Wednesday
Cloudy. 25 to 30 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level rises from 1500-2000 m over the day.

Thursday
Mostly cloudy. 10 to 20 mm of precipitation as snow or rain at treeline. 50 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Friday
Mostly cloudy. 2 to 5 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Be cautious of buried obstacles, especially below treeline.

Regiones cubiertas