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Avalanche Forecast

Archived

Dec 1st, 2024–Dec 2nd, 2024

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

Regions

Northwest Coastal, Boundary, Stewart, Ningunsaw, Ningunsaw, Ningunsaw.

Avoid being in or under avalanche terrain during periods of rapid loading from new snow and wind.

Confidence

Low

Avalanche Summary

Numerous small natural and explosive triggered wind slab and dry loose avalanches were reported on Saturday and Sunday.

With continued precipitation and strong winds in the forecast we can expect avalanches to increase in size on Monday.

Please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

More precipitation and strong southwesterly winds in the forecast are expected to continue building storm slabs throughout the night and into Monday.

100 cm or more of recent storm snow may be overlying variable snow surfaces, including small facets and/or surface hoar in sheltered areas and heavily wind-affected snow in exposed terrain.

A crust from early November can be found down 130 to 180 cm. Below this prominent crust are several other crust layers from October.

 

Weather Summary

Sunday Night

Cloudy with 25 to 35 cm of snow. 45 to 55 km/h southwest ridgetop wind. Treeline temperature -2 °C.

Monday

Cloudy with 25 to 35 cm of snow expected. Light to moderate rain below 750 m. 45 to 55 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level rising to 1000 m.

Tuesday

Cloudy with 10 to 20 cm of snow above the snow line, light to moderate rain below. 30 km/h southwest ridgetop wind. Freezing level rising to 1750 m.

Wednesday

Cloudy with light to moderate rain, possible snow at high elevations. 15 km/h southwest ridgetop wind. Freezing level around 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Don't let the desire for deep powder pull you into high consequence terrain.
  • Be aware of the potential for human triggerable storm slabs at lower elevations, even on small features.

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.