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Avalanche Forecast

Archived

Feb 25th, 2025–Feb 26th, 2025

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

Regions

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

Choose mellow terrain, and avoid lingering under steep slopes.

Multiple buried weak layers have the potential to cause avalanches after this period of rapid change.

Confidence

Moderate

Avalanche Summary

Monday: Many small and several large (up to size 2.5) natural and human triggered avalanches were reported in the recent storm snow. Two were remote triggered, suggesting that there is a touchy weak layer primed for human triggering.

Sunday: A large (size 1.5 to 3) natural avalanche cycle of was reported in the region on all aspects in alpine and treeline.

Snowpack Summary

Recent snow is 20 to 50 cm deep, 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

Tuesday Night

Mostly cloudy with up to 1 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1400 m.

Wednesday

Mostly cloudy. 40 to 50 km/h southwest ridgetop wind in the north end of the forecast area, lighter in the south. Treeline temperature 1 °C. Freezing level rising to around 1750 m.

Thursday

Partly cloudy with up to 5 cm of snow. 50 to 60 km/h southwest ridgetop wind getting lighter through the day. Freezing level 1750 m.

Friday

Partly cloudy. 10 to 20 km/h south ridgetop wind. Freezing level falling to valley bottom overnight, rising back to 1750 m through the day.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep in mind that human triggering may persist as natural avalanches taper off.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Use conservative route selection and resist venturing into complex terrain.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.

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.