Bulletin d’avalanche

Coquihalla

Dec 10 – 11, 2024Avalanche 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

Rising temperatures are increasing the chance of avalanches. Monitor the conditions and back off slopes as the surface becomes wet.

Reactive wind slabs may exist in high elevation terrain.

Problèmes avalancheux

  • Wind Slabs

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

    Wind slabs may be possible to trigger at high elevations where dry snow has been loaded into leeward terrain features.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

Confidence

Low

Avalanche Summary

There have been no recent reports in the region. We suspect the likelihood of avalanches has decreased substantially since the storm on the weekend, but rider-triggered wind slabs may still be possible at upper elevations on Tuesday.

Wet loose avalanches may be seen as freezing levels rise above mountain top.

If you are going out in the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

The surface snow will likely become wet due to warm alpine temperatures.

In the alpine, 20 to 40 cm of snow from the weekend sits above a thin crust. At lower 10-20 cm of snow sits above a a crust. The snow is moist below the crust.

Snow depths at treeline vary across the region. Around 90 cm is reported in the Coquihalla and 60 cm near Manning Park.

Weather Summary

Tuesday Night

Cloudy with isolated flurries. 10 to 15 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level valley bottom.

Wednesday

Cloudy with sunny periods. <10 km/h west ridgetop wind with strong gusty winds at times. Treeline temperature +4 °C. Freezing level 2500 m.

Thursday

Cloudy with scattered flurries 4 to 8 cm. Light (gusty at times) west ridgetop. Treeline temperature 0 °C. Freezing level rising to 2700 m.

Friday

Mostly cloudy with flurries 5 to 10 cm. 15 kim/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1300 m.

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.
  • Loose avalanches may start small, but they can grow and push you into dangerous terrain.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.

Régions couvertes