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Avalanche Forecast

Archived

Nov 22nd, 2024–Nov 23rd, 2024

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Vancouver Island, East Island, North Island, South Island, West Island.

Avoid avalanche terrain in areas where the snowpack is above threshold for avalanches.

Storm slab size and sensitivity will increase throughout the day.

Confidence

Moderate

Avalanche Summary

No avalanche observations have been reported yet this season.

Please consider filling out a MIN if you are out in the mountains.

Snowpack Summary

Storm snow continues to accumulate in the mountains. This recent snow has been accompanied by strong south easterly winds likely forming larger slabs on north and west aspects.

Various hard surfaces, including crusts or previously wind-affected snow, may exist below the recent storm snow.

Weather Summary

Friday Night

Cloudy with 20 to 50 cm of new snow. 30 to 60 km/h southeast ridgetop wind. Freezing level around 1100 m.

Saturday

Cloudy with 10 to 40 cm of new snow. 30 to 60 km/h southeast ridgetop wind. Treeline temperature -1°C. Freezing level 1100 m.

Sunday

Cloudy with up to 15 cm of new snow. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -3 °C.

Monday

Cloudy clearing to a mix of sun and cloud with trace amounts of new snow. 5 to 15 km/h southeast ridgetop wind. Treeline temperature -2°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • Don't let storm day fever lure you into consequential terrain.
  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.
  • Be cautious of buried obstacles, especially below treeline.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.