Bulletin d’avalanche

Coquihalla

Dec 15 – 16, 2024Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

Plan to carefully evaluate terrain and choose to avoid areas below ridgetop with deep pillows of freshly loaded snow.

Problèmes avalancheux

  • Wind Slabs

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

    Wind slabs are likely to have formed at higher elevations near ridge top where new snow has been loaded into leeward terrain features.

  • Storm Slabs

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

    Expect deeper storm slab development in areas with protection from the wind

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the old surface.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Be alert to conditions that change with aspect and elevation.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

Confidence

Moderate

Avalanche Summary

There have been no recent avalanche reports in the region.

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

Snowpack Summary

Strong winds during this past storm event are likely to have stripped snow from exposed alpine features and transported it to lee north aspect terrain. In wind-sheltered, open terrain this new snowfall is expected to have buried surface hoar. A thin melt-freeze crust on south-facing slopes in the alpine has likely become buried down a estimated 10 to 15 cm.

In the alpine, an estimated 30 to 50 cm of snow sits above a thin crust. At lower elevations, 10 to 20 cm of snow sits above a more robust crust. The snow is moist below the crust.

Snow depths at treeline vary across the region. Around 95 cm is reported in the Coquihalla and 65 cm near Manning Park.

Weather Summary

Saturday Night

Snow 10 to 20 cm. 25 to 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1400 m

Sunday

Snow 5 to 10 cm. 15 to 30 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 m.

Monday

Snow 1 to 5 cm. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 800 m.

Tuesday

Snow 1 to 5 cm. 10 to 20 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 800 m.

More details can be found in the Mountain Weather Forecast.

Régions couvertes