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Avalanche Forecast

Archived

Dec 20th, 2024–Dec 21st, 2024

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

Regions

North Columbia, South Columbia, Esplanade, Jordan, North Monashee, North Selkirk, Dogtooth, Central Selkirk, Gold.

Storm snow is beginning to stabilize.

Start with small, simple terrain before increasing your exposure to avalanche terrain.

Confidence

Moderate

Avalanche Summary

The natural avalanche cycle seems to be coming to an end. On Thursday there were a few small (size 1 to 1.5) natural storm slabs and dry loose avalanches reported.

On Wednesday, there was a widespread avalanche cycle. With natural and human-triggered avalanches reported up to size 3.

Snowpack Summary

40 to 50 cm of snow has fallen this week, with some areas in the west receiving up to 70 cm. This soft snow is being redistributed by a west-southwest wind in the alpine and open treeline.

A surface hoar layer formed in early December is now buried 50 to 90 cm and is most prevalent between 1700 to 2200 m. So far, this layer hasn't been reactive, but it's worth keeping on your radar.

Weather Summary

Friday Night

Cloudy with up to 5 cm of snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Saturday

A mix of sun and increasing clouds. 20 to 30 km/h south ridgetop wind. Treeline temperature -2 °C, freezing level 1500 m.

Sunday

A mix of sun and cloud with 5 to 10 cm of snow ending in the morning. 20 to 30 km/h south ridgetop wind. Treeline temperature -4 °C.

Monday

Mostly cloudy with up to 5 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Make observations and continually assess conditions as you travel.

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.