Boletín de aludes

Lizard-Flathead

Dec 30, 2018Avalanche Canada
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Archivado · caducó 8 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

I'm expecting some overnight snow that is likely to get blown into fresh wind slabs in exposed areas.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    1–2
    Touchy wind slabs have formed where wind has blown recent new snow into denser pillows.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    70-120 cm of snow sits on a weak layer consisting primarily of facets (sugary snow). This layer could still be triggered, particularly on steep, convex slopes.

Snowpack Summary

Saturday's storm added approximately 20 cm new snow, accompanied by strong southeasterly winds. In total, 80-130 cm of snowfall through December has formed a slab that sits on a persistent weak layer that formed in early December. This layer mostly consists of facets (sugary snow) with some isolated areas also containing small surface hoar (feathery crystals). All this overlies several other weak layers observed in the lower snowpack such as crusts and facets that formed in late October/early November. With this weak basal snowpack, it is possible that an avalanche triggered on the persistent slab would step down to these lower layers, resulting in a full depth avalanche.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

SATURDAY NIGHT: 15-20 cm additional new snow expected. Strong southwesterly winds.SUNDAY: Mostly light snow with the occasionaly heavier flurry. 2-5 cm. Light or moderate northwesterly winds. Treeline temperatures around -4C.MONDAY: Dry with sunny breaks. Light northerly winds. Treeline temperatures around -12C.TUESDAY: Dry with sunny breaks. Light southwesterly winds. Treeline temperatures around -12C.

Avalanche Summary

Small (size 1.5) storm slabs were reported in response to skier traffic on Saturday.A great MIN report from Corbin on Thursday identifies a few slabs initiating in thin, rocky areas on a south aspect. Check out the report here.

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