Bollettino valanghe

Northwest Coastal

Mar 12 – 13, 2026Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 7 months ago

Pericolo valanghe

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

In sintesi

Isolated wind slabs persist in the alpine. Human triggering remains possible.

Problemi valanghivi

  • Wind Slabs

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

    Roughly 40 to 50 cm of low density snow has been redistributed by moderate winds.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3.5

    Weak layers remain a concern in this region, especially where there is no supportive crust. Layer depth is variable. Areas where the snowpack transitions from thin to thick, and rocky terrain features should be approached cautiously.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

On Wednesday, A few small (size 1) skier triggered wind slab avalanches where reported on north aspect terrain between 1200 and 1400 meters.

On Tuesday, in the Ningunsaw west of highway 37 a large natural avalanche was reported that sympathetically released a second large avalanche. It is unclear if the release was on a persistent weak layer but the crown depth appeared to be very deep.

Reports of natural activity has tapered, but triggering of avalanches is still possible.

Snowpack Summary

The upper snowpack presents 20 to 50 cm of mostly light dry snow, in specific areas that are exposed to the wind, that new snow is wind pressed, stiffening and is forming soft wind slabs. The new snow overlies a heavily wind affected upper snowpack at treeline and above.

Below treeline a surface crust formed following the March 7 warming event and tapers above roughly 1600 m.

The mid snowpack, down an estimated 90 to 130 cm, weak layers of surface hoar, facets and crusts remain a concern especially where there is no supportive crust. Triggering of these layers is becoming less likely, but still remain at a depth where human triggering is possible.

The remaining snowpack is generally well settled and well bonded.

Weather Summary

Thursday Night
Partly cloudy. 1 to 2 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -8 °C.

Friday
Mix of sun and clouds. 1 to 4 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -9 °C.

Saturday
Mix of sun and clouds. 5 to 10 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -9 °C.

Sunday
Mostly cloudy. 4 to 10 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -9 °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.
  • If triggered, wind slabs may step down to deeper layers, causing larger avalanches.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Use appropriate sluff management techniques.

Regioni coperte