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Avalanche Forecast

Archived

Dec 3rd, 2024–Dec 4th, 2024

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

Regions

South Columbia, South Okanagan, Shuswap, Dogtooth, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold, North Okanagan, Retallack, Valhalla, Whatshan.

Lingering wind slabs may be reactive in leeward terrain features. Monitor surface conditions as you travel, especially as you transition into wind affected terrain.

Confidence

Moderate

Avalanche Summary

One large slab avalanche (size 2.5) was seen from a steep south aspect. Reports suggest it was several days old.

Wind slabs continue to linger in the region, with reports indicating they are stubborn to rider triggering.

Observations remain limited this early in the season. If you head into the backcountry, please post to the Mountain Information Network.

Snowpack Summary

Surface conditions vary from wind affected surfaces in exposed terrain at higher elevations, and settling snow in sheltered areas that may include a layer of surface hoar buried 5 to 10 cm deep. Warmer temperatures will likely affect the surface snow and produce a crust overnight.

The mid snowpack is generally well settled, with an early November crust buried 50 to 100 cm deep. This layer is understood to be more notable in the Selkirk Mountains.

Snow depths at treeline are roughly 80 to 150 cm, and decrease rapidly at lower elevations.

Weather Summary

Tuesday Night

Partly cloudy. 15 to 40 km/h west ridgetop winds. Treeline temperatures around -5 °C with an above-freezing layer bringing the alpine temperatures to 0 °C.

Wednesday

Cloudy with sunny periods. 15 to 30 km/h southwest ridgetop wind. The above-freezing layer brings alpine temperatures around +1 °C. Treeline temperatures near -2 °C.

Thursday

Cloudy with isolated flurries possible for the Cariboos. Sunnier skies further south. 20 to 40 km/h southwest ridgetop wind. The above-freezing layer brings alpine temperatures around +2 °C. Treeline temperatures near -1 °C.

Friday

Mostly cloudy. New snow 5 cm. 15 to 35 km/h southwest ridgetop wind. Alpine temperatures near -3 °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.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

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.