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Avalanche Forecast

Archived

Feb 23rd, 2025–Feb 24th, 2025

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

Regions

Cariboos, Blue River, Clearwater, McBride, Premier, Quesnel, Clemina, North Monashee.

Dangerous avalanche conditions, avoid large slopes, overhead hazards and steep terrain

Confidence

Moderate

Avalanche Summary

Saturday: Many large (size 1.5 to 2.5) remote and naturally triggered avalanches were reported through the region, in both the alpine and treeline on northerly aspects. One MIN report describes a remote trigger from 400 m away!

Friday: One large (size 2) remote triggered avalanche was reported on a north facing slope at treeline.

Snowpack Summary

New snow is accumulating across the region (10 to 40cm), burying various surfaces, including old wind-affected snow in exposed terrain, sun crusts on south-facing slopes, and weak surface hoar or faceted grains in sheltered areas.

Layers from dry conditions in January are found at varying depths within the upper 100 cm of snow. These include weak faceted snow, sun crusts on south-facing slopes, and surface hoar in shaded terrain.

The mid and lower snowpack is generally well-settled and strong.

Weather Summary

Sunday Night

Mostly cloudy with up to 10 cm of snow. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday

Mostly cloudy with up to 5 cm of snow. 10 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1500 m.

Tuesday

Mix of sun and cloud with up to 5 cm of snow. 10 to 30 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1600 m.

Wednesday

Mix of sun and cloud with flurries. 10 to 40 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 1900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Avalanche danger is expected to increase throughout the day.
  • Be aware of the potential for large avalanches due to buried weak layers.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.