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Avalanche Forecast

Archived

Jan 6th, 2024–Jan 7th, 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.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

New snow and wind will cause avalanche hazard to increase. Use extra caution in areas with recent wind loading

Skin tracks and certain terrain features that were used last week may not be appropriate this weekend!

Confidence

No Rating

Avalanche Summary

Recent snow and wind has triggered a natural avalanche cycle. Storm slab avalanches were observed on the east side of the park off of the steep terrain on Mt Macdonald to size 3.

Snowpack Summary

20-30cms of storm snow with moderate to strong winds has created a storm slab in the alpine and exposed areas at treeline. This new snow sits on sun crust on solar aspects; firm wind effect in the alpine; and soft facetted snow on sheltered N aspects.

Below 2100m there is a strong rain crust down 40-60cm (from Dec 5th/6th).

The Dec 1 surface hoar, down 60-100cm, has seen isolated deep pockets "pop" out in steeper, alpine terrain.

Record low snowpack for the Park.

Weather Summary

Storms this weekend will bring much needed snow to Roger's Pass. In the wake of the storm Monday, temperatures will plummet.

Tonight: Cloudy with flurries, Alpine low -13°C, Ridgetop winds: NE 20.

Sun: A mix of sun and cloud, Nil precip, High -13°C, Light W wind.

Mon: isolated flurries, trace precip, Low -17, High -11°C, SW winds to 25km/hr.

Tues: Periods of snow: 14cm, High -9°C, SW winds 25 km/hr gusting to 75 km/hr.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid areas with overhead hazard.
  • Be carefull with sluffing in steep terrain, especially above cliffs and terrain traps.

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.