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Avalanche Forecast

Archived

Mar 3rd, 2025–Mar 4th, 2025

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.

Regions

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

Dry snow remains in high elevation northerly terrain however, this is where triggering weak layers is most likely. Manage this high-consequence snowpack with low-consequence terrain.

Confidence

Moderate

Avalanche Summary

Over the weekend, numerous natural and human-triggered avalanches, up to size 3, were reported at all elevations and aspects, many failing on the late January persistent weak layer.

On Saturday, a skier remotely triggered a size 3 persistent slab avalanche on a northwest-facing slope at 2050 m. See MIN for photos and details.

Natural avalanche activity has tapered off with cooler temperatures; however, human triggering the persistent layers remains a concern.

Snowpack Summary

A few centimeters of snow cover a melt-freeze crust that extends to ridgetops on all aspects, except northerly slopes above 1700 m, where surfaces remained dry.

A weak layer of facets/surface hoar, or a crust is found 20 to 50 cm down. Additional weak layers formed in January are present at varying depths within the upper 100 cm of snow, including faceted snow, crusts on south-facing slopes, and surface hoar in shaded terrain.

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

Weather Summary

Monday Night

Clear skies. 10 to 20 km/h southeast ridgetop wind. Treeline temperature -7 °C. Freezing level drops to valley bottom.

Tuesday

Increasing cloud. 10 to 25 km/h southeast ridgetop wind. Treeline temperature -3 °C. Freezing level rising to 1500 m.

Wednesday

Cloudy with light flurries, 1 to 5 cm of snow. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1300 m.

Thursday

A mix of sun and cloud. 10 to 25 km/h northwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present in the snowpack.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Uncertainty is best managed through conservative terrain choices.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.