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Avalanche Forecast

Archived

Nov 30th, 2022–Dec 1st, 2022

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

South Coast Inland, Coquihalla, Duffey, Harrison-Fraser, Manning, South Chilcotin, Stein.

Use caution as the new snow settles and bonds to the existing snowpack. Avoid wind-loaded pockets and seek out riding in sheltered areas.

Early season hazards continue to pose a threat and are lurking just below the surface.

Confidence

Low

Avalanche Summary

No new avalanches have been observed or reported in the region. Poor visibility and limited observations account for part of this. If you head into the backcountry consider submitting a MIN report.

Snowpack Summary

The snowpack at 1500 m ranges between 60 and 120 cm deep. Tuesday night saw 20 to 30 cm of new snowfall in the southern and eastern regions of our area and less to the north. Our top layer of snow is low density and ranges between 45 and 80 cm. Accompanied winds, packets have begun to form in the immediate lee. At upper elevations, new snow covers a crust. Below the crust is 40 to 80 cm of early November snow. The strength of this basal interface is unknown at the moment.

Terrain features still lurk below the surface. Below treeline and even into treeline elevations are still at below the threshold for avalanches.

Weather Summary

Wednesday Night

Cloudy with clear periods, no cm accumulation, winds northeast 10 to 25 km/h, temperatures -15 at 1500 m.

Thursday

A mix of sun and cloud, no accumulation, winds variable 10 to 20 km/h, temperatures -10 C at 1500 m.

Friday

Mostly cloudy, 5 to 10 cm accumulation, winds southerly 20 to 30 km/h, temperatures -10 to -15 C.

Saturday

A mix of sun and cloud, trace accumulation, winds northeast 10 km/h, temperatures 0 to -5 C with a temperature inversion.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make observations and assess conditions continually as you travel.
  • Be carefull around freshly wind loaded features.
  • Closely monitor how the new snow is bonding to the crust.
  • Dial back your terrain choices if you are seeing more than 30 cm of new snow.

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.