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Avalanche Forecast

Archived

Nov 26th, 2024–Nov 27th, 2024

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

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

Watch for new wind slab formation during the day.

If you see more than 25 cm of new snow accumulation, treat the local avalanche danger as Considerable and watch for storm slab formation.

Confidence

Low

Avalanche Summary

This MIN report includes observations of minor sluffing on steep south-facing slopes on Monday.

No other new avalanches have been reported since the weekend, but reports have been limited, especially in areas near Terrace. Please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

The new snowfall will bury a variable snow surface which may include small facets and/or surface hoar in sheltered areas and heavily wind-affected snow in exposed terrain.

In sheltered terrain in the northern part of the forecast region, a surface hoar layer may be found down around 60 cm.

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

Tuesday Night

Cloudy with light snowfall up to 5 cm. 30 to 40 km/h northwest ridgetop wind. Treeline temperature -10 °C.

Wednesday

Cloudy with snowfall up to 20 cm. 40 to 50 km/h west ridgetop wind. Treeline temperature -6 °C.

Thursday

Cloudy with snowfall up to 30 cm. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Friday

A mix of sun and cloud. 30 to 40 km/h northwest ridgetop wind. Treeline temperature -10 °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.
  • 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.