Bulletin d’avalanche

Coquihalla

Nov 28 – 29, 2024Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Seek out sheltered powder for better, safer riding. Put your guard up if you encounter signs of recent wind slab formation and while you navigate areas of thin coverage.

Problèmes avalancheux

  • Wind Slabs

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

    For the most part, older wind slabs should now be stabilized. Small new slabs could form with wind acting on slopes with soft, transportable snow.

Avalanche Summary

We have not had any reports of avalanche activity.

Please consider sharing any observations you have on the Mountain Information Network.

Confidence

Low

Snowpack Summary

Up to 5 cm of new snow from Tuesday night may have given a thin cover to a new layer of surface hoar. This grain hasn't been reported in the Cascades yet but has been growing vigourously in adjacent regions.

Below the surface, 10 - 15 cm of soft snow may still exist on sheltered, shaded slopes. In most other areas, especially the alpine, this snow has been heavily wind-redistributed. Cold temperatures are now faceting this upper layer, causing snow grains to lose cohesion.

Various melt-freeze crusts exist in the bottom half of the snowpack but do not appear to be avalanche concerns.

Around 100 cm of snow can be found at treeline. This diminishes rapidly below about 1500 m, where a surface crust is present.

Weather Summary

Wednesday night

Cloudy with isolated flurries. 25 to 30 km/h west ridgetop wind. Freezing level 700 m.

Thursday

Cloudy with isolated flurries. 25 to 30 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 900 m.

Friday

Cloudy with isolated flurries, increasing a bit overnight. 35 - 40 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 700 m.

Saturday

Cloudy with easing flurries and new snow totals up to 5 cm. 30 - 35 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Wind slabs are most reactive during their formation.

Régions couvertes