Bollettino valanghe

East Kakwa

Feb 29 – Mar 1, 2024Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 3 years ago

Pericolo valanghe

Sat
Sun
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

A persistent slab is slowly becoming more reactive as the load above it increases. The best way to manage this problem is to stick to conservative terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2

    Recent new snow has been redistributed by wind blowing from a variety of directions.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1.5–3

    A weak layer of facets and/or surface hoar may rest above a hard-melt freeze crust that formed early February. This layer remains in the depth for human triggering and has recently been triggered by riders.

Confidence

No Rating

Avalanche Summary

In the neighbouring region, many natural and skier triggered persistent slab avalanches occurred on the facets above the early-February melt-freeze crust described in the Snowpack Summary. They occurred on northerly aspects between 1600 and 2000 m and were 50 to 80 cm thick.

Riders could trigger similar avalanches in the coming days. Persistent slab problems take a while to heal so giving them time is warranted.

Snowpack Summary

30 to 50 cm of recent snow sits on a variety of layers that it may not bond well to, including surface hoar in wind-sheltered terrain, weak facets, or a hard melt-freeze crust on sun-exposed south and west-facing slopes. The wind has likely formed thicker deposits in lee terrain features near ridges.

A thick and hard widespread crust that formed in early February is buried about 50 to 70 cm deep. This crust may have a layer of facets above it, which makes it a troublesome avalanche layer.

The remainder of the snowpack is settled.

Weather Summary

Wednesday Night

Cloudy with 3-5 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Thursday

Mostly cloudy. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -9 °C.

Friday

Mix of sun and cloud. 15 to 30 km/h southeast ridgetop wind. Treeline temperature -13 °C.

Saturday

Mix of sun and cloud. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -15 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Use conservative route selection and resist venturing out into complex terrain.
  • Potential for wide propagation exists, fresh slabs may rest on surface hoar, facets and/or crust.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Regioni coperte