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Avalanche Forecast

Archived

Nov 21st, 2024–Nov 22nd, 2024

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, 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.

Regions

Cariboos, North Columbia, Blue River, Clearwater, McBride, Premier, Quesnel, Clemina, Esplanade, Jordan, North Monashee, North Selkirk, Shuswap, East Kakwa, Kakwa, Renshaw, Robson, Dogtooth, Central Selkirk.

Watch for signs of instability as the recent snow settles.

Choose mellow terrain while you get familiar with the snowpack, practice your rescue skills, and get your winter legs under you.

Confidence

Moderate

Avalanche Summary

Human triggered loose dry and low density storm slab avalanches have been recently reported around treeline and below.

Looking forward, the recent snow may settle into a more cohesive slab, and could producing surprisingly large avalanches if there are weak, sugary facets sitting over the early November crust.

If you are getting out in the backcountry, consider making a post on the MIN (Mountain Information Network)

Snowpack Summary

The recent snow is mostly low density and sticking well to the settling snow below. In some areas, ridgetop winds are forming fresh wind slabs.

A crust buried in early November is 50-90 cm below the surface. In some places, there are weak facets or surface hoar above this crust, but the geographical extent of this weak layer is still uncertain. This will be an important layer to watch as the low density snow settles and gains cohesion.

Treeline snowpack depths average 80-150 cm. At valley bottom, the average is around 40 cm.

Weather Summary

Thursday Night

Partly cloudy with 0-2 cm snow expected. 5-10 km/h southwest ridgetop wind. Treeline temperature -15 °C in the north end of the forecast area, -7 °C in the south end.

Friday

Mostly cloudy with 0-5 cm of snow expected. 10-25 km/h southeast ridgetop wind. Treeline temperature -13 °C in the north end of the forecast area, -7 °C in the south end.

Saturday

Cloudy with 2-8 cm of snow expected. 10-20 km/h southwest ridgetop wind. Treeline temperature - 5 °C, colder in the north end of the forecast area.

Sunday

Cloudy with 2-10 cm of snow expected. 25-50 km/h south ridgetop wind. Treeline temperature -7 °C, colder in the north end of the forecast area.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Start with conservative terrain and watch for signs of instability.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

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.