Bulletin d’avalanche

South Coast Inland

Jan 14, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Unseasonably warm weather will make cornices unstable. Give them a wide berth.Avalanche danger is considerable in the far north of the region.

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Sun and warm temperatures can cause loose wet and wet slab avalanche conditions. Look for clues like sticky snow, rollerballing or recent avalanche activity that indicate the snowpack is losing strength.

Confidence

Moderate - Freezing levels are uncertain on Monday

Weather Forecast

MONDAY: Sunny and warm. Freezing level near 2200 m, with cooler air in the valleys. Alpine high near +5. Light winds. TUESDAY: Sunny and warm. Freezing level near 1700 m. Alpine high near 0. Light winds. WEDNESDAY: Mix of sun and cloud. Freezing level near 800 m. Alpine high near -3. Light winds. More details can be found in the Mountain Weather Forecast.

Avalanche Summary

Size 1 loose wet avalanches were reported on Saturday. In the neighboring Sea to Sky region, several large cornice falls have occurred during the warm spell - beware if you are in cornice country.

Snowpack Summary

Due to warming, cornices are likely to be weak if you encounter them. Melt-freeze crusts are likely on south aspects, and on all aspects below about 1900 m. A limited overnight freeze is expected, so crusts may break down quickly with daytime warming, potentially leading to loose wet avalanche conditions.Warmth has promoted settlement of the snowpack and helped bond old wind slabs. At alpine elevations, variable areas of wind slabs and dry snow may be found. However, a generally well-settled upper snowpack is reported, with supportive crusts in the upper snowpack that are isolating deeper snowpack weaknesses. Most of our observations come from the Duffey Lake and Coquihalla regions, so if you are venturing further afield,  the local snowpack may not be as strong. Please investigate.There remains a small chance of triggering a deeply buried crust/facet layer with a heavy trigger such as a cornice fall, or from a thin spot.

Régions couvertes