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Avalanche Forecast

Archived

Dec 27th, 2024–Dec 28th, 2024

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

Dial back your objectives on this stormy day.

Storm slabs have the potential to propagate far and wide due to buried crusts.

Confidence

Moderate

Avalanche Summary

Observations have been limited in this region. Riders on Thursday reported avoiding ridgetop drop-ins because of the presence of slabby snow conditions.

Looking ahead, expect that storm slabs will continue to be reactive.

Please consider sharing your observations to the Mountain Information Network (MIN).

Snowpack Summary

A stormy Saturday where 20 to 40 cm of snow is expected by the end of the day. This snow will be transported by moderate to strong southwesterly winds, building reactive cornices and slabs on lee slopes.

The accumulated storm snow may be poorly bonded to an underlying crust, which could result in very large avalanches. This crust is 60 to 100 cm deep. A layer of surface hoar may exist just above this crust in sheltered terrain at treeline.

Snow depths at treeline vary between 90 to 160 cm.

Check out this MIN report of conditions.

Weather Summary

Friday NightCloudy with 5 to 10 cm of snow. 20 to 40 km/h south ridgetop wind. Treeline temperature -6 °C. Freezing level dropping to valley bottom.

Saturday

Cloudy with up to 15 cm of new snow. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Sunday

Partly cloudy with trace precipitation. 20 km/h south ridgetop wind. Treeline temperature -5 °C.

MondayMostly cloudy. 15 to 40 km/h south ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • It's a good day to make conservative terrain choices.
  • Watch for fresh storm slabs building throughout the day.
  • Be aware of the potential for large avalanches due to a buried crust.
  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.

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.