Lawinenlagebericht

Vancouver Island

Jan 21 – 22, 2024Avalanche Canada
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Archiviert · abgelaufen 3 years ago

Lawinengefahr

Tue
Wed
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Heavy snow and rain have impacted the snowpack. Raise your guard anywhere the storm snow remains dry, it is likely bonding poorly to the underlying surface.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2

    Dense storm snow overlies light, low-density snow and may remain reactive to human triggering, particularly in wind-loaded terrain.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1.5–3

    A weak layer of facets overlying a crust exists down 50 to 100 cm. This layer is most likely to be an issue in wind-loaded, high alpine terrain where the recent storm snow remains dry.

Confidence

Moderate

Avalanche Summary

On Friday, there were reports of skier triggered small wind slab avalanches running on the crust below. On Thursday, our Field Team skier triggered several wind slabs (size 1-2) from alpine and treeline terrain near Mount Cokely. Read more in this MIN.

We suspect a widespread natural avalanche cycle occurred on Friday with heavy loading from snow, rain and wind.

Snowpack Summary

Rain has impacted the snowpack in most areas, leaving the surface wet and sloppy. Dry snow may prevail in the alpine, and will have been redistributed by strong southerly winds.

A weak facet/crust layer can be found down 50 to 100 cm. The remainder of the snowpack is strong, with numerous hard melt-freeze crusts.

Treeline snow depth ranges from 100 to 180 cm. Snow depth diminishes rapidly at low elevations where there has been more rainfall.

Weather Summary

Saturday Night

Cloudy with light rain. Alpine wind southeast 20 to 40 km/h. Treeline temperature falling to 0 °C.

Sunday

Cloudy with mixed precipitation, 5 to 15 cm of new snow accumulation at higher elevations. Alpine wind southwest 30 to 50 km/h. Treeline temperature 1 °C. Freezing level 1400 m.

Monday

Cloudy with rain, 4 cm of new snow accumulation at higher elevations. Alpine wind southwest 30 to 40 km/h. Treeline temperature 3 °C. Freezing level 1500 m,

Tuesday

Cloudy with rain, 2-6 cm of new snow accumulation at higher elevations. Alpine wind south 30 to 60 km/h. Treeline temperature 4 °C. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

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