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Avalanche Forecast

Archived

Dec 18th, 2024–Dec 19th, 2024

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

South Coast Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

Continuously monitor conditions as you move through terrain

Storm slabs may be more reactive at higher elevations

As the freezing level rises wet loose avalanches will become more likely

Confidence

Moderate

Avalanche Summary

No recent avalanches have been reported in the region, but observations are limited. We suspect natural avalanche activity took place overnight on December 17th during the peak of the storm.

If you are going out in the backcountry, please consider sharing your observations to the Mountain Information Network (MIN)

Snowpack Summary

By early morning on the 18th 20 to 30 cm of snow fell in less than 24 hours. This new snow was accompanied by southerly wind likely forming deeper deposits on northerly aspects.

20 to 50 cm overlies a crust on south aspects and all aspects below 1800 m. A layer of surface hoar could be found just above this layer in sheltered terrain at treeline.

Snow depths at treeline are around 80-120 cm.

Weather Summary

Wednesday Night

Mostly cloudy. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Thursday

Mostly cloudy with up to 5 cm of snow expected. 40 to 60 km/h south ridgetop wind. Freezing level rising to 1700 m.

Friday

Mostly cloudy with light rain expected. 20 to 40 km/h south ridgetop wind. Freezing level rising to 2200 m.

Saturday

Mostly cloudy with up to 5 mm of precipitation. 20 to 40 km/h southeast ridgetop wind. Freezing level rising to 1900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be careful as you transition into wind-affected terrain.
  • Be alert to conditions that change with aspect and elevation.

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.