Bulletin d’avalanche

Lizard-Flathead

Feb 11 – 12, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Continuously assess conditions as you move through terrain

Avalanches are possible where the upper snowpack feels "slabby"

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5

    Cold temps are likely softening the upper snowpack. Wind slabs could still be triggered where the upper snowpack feels "slabby".

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–2.5

    Human triggered avalanches are possible where a slab has formed above a weak layer of surface hoar, facets, and/or crust buried at the end of January about 50 to 70 cm deep.

Confidence

Moderate

Avalanche Summary

On Sunday several size 1 dry loose avalanches were observed in steep terrain.

On Friday a  size 2 remotely triggered avalanche was reported at treeline on a south aspect on a 35 degree slope.

Snowpack Summary

Exposed terrain in the alpine and treeline is variably wind-affected. In sheltered terrain a layer of surface hoar may be found just below the surface.

50 cm  of faceted snow overlies a weak layer from late January. This layer consists of a crust on sun exposed slopes and a layer of surface hoar on all other aspects.

The mid and lower snowpack is generally well settled.

Weather Summary

Monday Night

Clear skies. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -22 °C.

Tuesday

Sunny. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -19 °C.

Wednesday

Mostly sunny. 10 to 30 km/h west ridgetop wind. Treeline temperature -15 °C.

Thursday

Sunny. 10 to 20 km/h south ridgetop wind. Treeline temperature -11 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.

Régions couvertes