Bollettino valanghe

Northwest Coastal

Mar 17 – 18, 2026Avalanche Canada
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Archiviato · scaduto 7 months ago

Pericolo valanghe

Thu
Fri
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato

In sintesi

Large storm slabs will likely be reactive to human triggers on Wednesday.

Choose simple, low angle terrain, and avoid overhead hazards.

Problemi valanghivi

  • Persistent Slabs

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

    Persistent weak layers of crusts/facets and/or surface hoar in the top 150 cm of the snowpack remain a concern in this region, especially where there is not a thick crust under the recent snow.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3.5

    70 to 90 cm of recent snow and strong southwest winds have formed reactive storm slabs overlying a weak layer of surface hoar and/or facets.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.

Avalanche Summary

On Monday, numerous natural and skier triggered storm slabs up to size 2 were reported near Terrace on all elevations/aspects. Several were remotely triggered by skiers. Average crown depths were 30 to 40 cm.

Numerous naturally triggered wet loose avalanches up to size 2 were also reported below treeline.

Snowpack Summary

70 to 90 cm of recent snow and strong southwest winds have formed reactive storm slabs overlying a weak layer of surface hoar and/or facets. This weak layer will make large storm slabs more likely to trigger.

There are multiple persistent weak layers consisting of crust/facets or surface hoar in the top 150 cm of the snowpack.

The lower snowpack is generally well settled and strong.

Weather Summary

Tuesday Night
Mostly cloudy. 0 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Wednesday
Cloudy. 5 to 20 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Thursday
Mostly cloudy. 4 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Friday
Mix of sun and clouds. 20 km/h southwest ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Be aware of the potential for larger than expected storm slabs due to buried surface hoar.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Use small, low consequence slopes to test the bond of the new snow.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

Regioni coperte