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Avalanche Forecast

Archived

Dec 1st, 2023–Dec 2nd, 2023

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

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, South Okanagan, Ymir, Shuswap, North Okanagan.

Storm slabs could build throughout the day and be touchy in areas where new snow has buried a surface hoar layer. Watch out for newly covered obstacles.

Confidence

No Rating

Avalanche Summary

Storm slabs may develop as the snow accumulates throughout the day and could be touchy in areas where this new snow buries surface hoar. In areas where there is less than 15 cm of new snow, loose dry avalanches are likley.

Observations are limited this time of year. Please consider filling out a MIN report if you head out in the backcountry! 🙏

Snowpack Summary

10 to 15 cm of new snow will bury a surface hoar layer formed during the clear, cool weather over various surfaces of wind-pressed snow, sun crust, and faceted soft snow.

A crust with facets or depth hoar beneath it exists near the ground.

Expect early-season conditions with a shallower-than-average snowpack. At treeline, snowpack depths are between 30-80 cm. Below treeline, snowpack depths taper quickly.

Weather Summary

Friday Night

Cloudy with isolated flurries and trace accumulation. Southwest wind 25 to 30 km/h. Treeline temperature -7 °C.

Saturday

Cloudy with flurries continuing from the overnight period, bringing 10 to15 cm of new snow. Southwest wind 30-40 km/h. Treeline temperature -5 °C.

Sunday

Cloudy with flurries, 3 to 5 cm accumulation. South wind 40 to 60 km/h. Treeline temperature -5 °C.

Monday

Cloudy with flurries, 5 to 10 cm accumulation, south wind 10 to 20 km/h. Treeline temperature -3 °C

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.

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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.