Boletín de aludes

Flathead

Feb 27 – 28, 2026Avalanche Canada
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Archivado · caducó 7 months ago

Peligro de aludes

Sun
Mon
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Lo esencial

Wind slab formation has been extensive and could extend into openings below treeline.

Persistent slabs sitting on a weak layer of surface hoar have been most reactive at treeline and below.

Problemas de aludes

  • Wind Slabs

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

    Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.

  • Persistent Slabs

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

    Be aware of the potential for remote triggering and large avalanches due to buried surface hoar, especially at treeline and below.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

On Tuesday, a naturally triggered size 2 wind slab and numerous explosive triggered size 2 wind slabs were reported on north and east aspects in the alpine.

Numerous persistent slab avalanches up to size 3 were reported on all aspects and elevations last weekend. They were triggered accidentally, naturally, and remotely.

See recent MIN reports here and here for further details.

Snowpack Summary

20 cm of recent snow and variable strong winds have formed wind slabs on a variety of aspects. Wind slabs formation has been extensive, even forming slabs in open areas below treeline.

In the top 125 cm of the snowpack, there are multiple concerning weak layers of surface hoar and/or crusts/facets.

The majority of recent persistent slab avalanches have been on well-preserved surface hoar in sheltered areas at treeline and below.

The mid and lower snowpack are well settled.

Weather Summary

Thursday Night
Cloudy. 0 to 5 cm of snow. 70 km/h west ridgetop wind. Treeline temperature -5 °C.

Friday
Cloudy. 0 to 10 cm of snow. 60 km/h west ridgetop wind. Treeline temperature -6 °C.

Saturday
Sunny. 35 km/h west ridgetop wind. Treeline temperature -4 °C.

Sunday
Sunny. 35 km/h west ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • In times of uncertainty, conservative terrain choices are our best defense.

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