Boletín de aludes

Microwave-Sinclair

Mar 7 – 8, 2026Avalanche Canada
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Archivado · caducó 7 months ago

Peligro de aludes

Mon
Tue
Alta montaña
4 · Fuerte
Límite del bosque
4 · Fuerte
Bajo el límite
2 · Moderado
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Lo esencial

Dangerous avalanche conditions exist.

Avoid wind-loaded slopes, especially where wind slabs overlie facets or in thin, rocky terrain where persistent slabs are easier to trigger.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    Wind slabs remain likely at higher elevations, particularly during periods of snow and increased wind transport. Small wind slabs have the potential to step down to deeper weak layers in the upper snowpack.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–3

    A buried layer of facets in the snowpack is expected to be more reactive in wind-affected thin rocky terrain features. If triggered this problem is likely to produce widely propagating large avalanches.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–1.5

    Loose wet avalanches may be reactive where precipitation falls as rain.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.
  • We are uncertain due to the variability of wind effect on the snowpack.
  • We are uncertain about how the timing or intensity of warming will affect the snowpack.

Avalanche Summary

Large natural wind slab avalanches up to size 2.5 were observed over the past week, likely triggered during periods of rapid loading from strong winds. Avalanches occurred on a variety of aspects, highlighting variable wind patterns.

Please post any photos or observations to the MIN if you head out.

Snowpack Summary

Recent snow over the last week has been redistributed by primarily southwest winds. Exposed terrain is wind-pressed or scoured down to old crusts formed in late January. While wind slab formation continues to occur in leeward or cross-loaded terrain.

Two notable layers exist in the snowpack. A layer of facets from early February, up to 40 cm deep. A thick crust from late January, 50 to 100 cm deep. Both of these layers are a concern in wind-affected terrain. Read more about persistent slab problem here.

The remainder of the snowpack is well settled.

Weather Summary

Friday Night

Partly cloudy. 1 mm of precipitation as snow or rain at treeline. 80 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1500 m.

Saturday

Cloudy. 4 to 5 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1400 m.

Sunday

Mix of sun and clouds. 5 to 10 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -6 °C.

Monday

Mix of sun and clouds. 1 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -9 °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.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Loose avalanches may step down to deeper layers, resulting in larger avalanches.

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