Bollettino valanghe

Purcells

Mar 16 – 17, 2025Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 2 years ago

Pericolo valanghe

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

In sintesi

Stay vigilant, as conditions may change rapidly.

Expect significant variability based on elevation, aspect, and exposure to wind and sun.

Problemi valanghivi

  • Wind Slabs

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

    New snow overlies a variety of surfaces, including surface hoar, facets, or a crust, which may make wind slabs more reactive and take longer to bond.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3

    Several persistent weak layers exist within the snowpack and have been the cause of recent large avalanches in the region. The greatest concern for triggering these layers is on upper elevation north and east facing slopes.

  • Loose Wet

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

    Wet loose avalanches will be likely on sun-exposed slopes. Avoid overhead hazard from steep sunny faces during the warmest parts of the day.

Confidence

Moderate

Avalanche Summary

Fri: Several large to very large (size 2-3) persistent slab avalanches occurred in the region. All of them initiated in the alpine.

Thurs: A large (size 2) naturally-triggered persistent slab near Invermere and a size 2.5 persistent slab near Kimberley were observed.

Tues: Avalanche control produced large avalanches (up to size 3.5) in the central-western part of the region.

Looking forward: Wind slabs and persistent slabs are expected to remain triggerable on Sunday.

Snowpack Summary

30 - 50 cm of new snow accumulated in the region over the last few days. This snow covers a crust on sunny slopes and lower elevations, and surface hoar or facets on sheltered and shady upper elevations. Alpine and treeline areas have experienced southwesterly winds that built slabs on lee north and east-facing slopes.

Several persistent weak layers consisting of a crust, facets or surface hoar from February and January remain a concern, buried 50 to 100 cm. In many areas, facets or depth hoar also make up the base of the snowpack.

Weather Summary

Sunday Night

Partly cloudy with isolated flurries up to 2 cm. 15 to 30 km/h west ridgetop winds. Treeline temperature -9 °C.

Monday

Mostly sunny. 10 to 25 km/h southwest ridgetop winds. Treeline temperature -5 °C.

Tuesday

Mostly sunny. 10 to 20 km/h west ridgetop winds. Treeline temperature -6 °C.

Wednesday

Sunny. 10 to 25 km/h south ridgetop winds. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large, destructive avalanches due to deeply buried weak layers.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.

Regioni coperte