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Avalanche Forecast

Archived

Nov 25th, 2024–Nov 26th, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Coastal, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Ningunsaw, Ningunsaw, Ningunsaw.

Avalanches are becoming harder to trigger but remain possible in steep wind exposed terrain.

Confidence

Moderate

Avalanche Summary

Over the weekend several natural wind slab avalanches were reported. These avalanches were up to size 2 and on northerly alpine features.

Early season reports have been extremely limited, especially in areas near Terrace. Please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

The snow surface is highly variable. Soft faceted snow and surface hoar can be found in sheltered areas. In exposed terrain the surface is highly wind affected.

On sheltered features, in the northern part of the forecast region, a surface hoar layer could be found down 60 cm.

A crust from early November can be found down 50 to 120 cm. Below this prominent crust are several others from October.

Snow depths vary across the region, but generally range from 100 to 200 cm in the alpine and about 50 cm at 1000 m.

Weather Summary

Monday Night

Mostly clear  with trace amounts of new snow possible. 15 to 30 km/h westerly ridgetop wind. Treeline temperature -6°C

Tuesday

Mostly cloudy  with up to 10 cm of snow possible in the northwest of this forecast region. 20 to 40 km/h west ridgetop wind. Treeline temperature -6°C.

Wednesday

Cloudy with up to 10 cm of snow expected. 20 to 40 km/h west ridgetop wind. Treeline temperature -11°C.

Thursday

A mix of sun and cloud with up to 5 cm of snow expected. 5 to 20 km/h north ridgetop wind. Treeline temperature -14°C.wind

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for areas of hard wind slab on alpine features.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.