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Avalanche Forecast

Archived

Mar 23rd, 2024–Mar 24th, 2024

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

Regions

Northwest Coastal, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Ningunsaw, Ningunsaw, Ningunsaw.

Back off sun affected slopes as snow becomes wet and slushy.

While dry snow may remain on north facing features at treeline and alpine elevations, weak layers are possible to trigger here.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported on Friday. Loose wet avalanches were observed from steep solar slopes earlier this week. Avalanches ranged from size 1-2.5, with the larger avalanches scouring to ground.

The last persistent slab activity was reported on Wednesday to size 3. This occurred on south facing alpine slopes likely triggered by daytime warming. Size 2 avalanches were also skier triggered in shallow rocky areas, producing persistent slab avalanches.

Weather Summary

Saturday Night

Clear skies. Light and variable winds. Freezing levels remain around 2000 m overnight.

Sunday

Sunny. 20-30 km/h southwest ridgetop wind. Treeline temperature +4. Freezing levels remain around 2000 m throughout the day.

Monday

Mostly cloudy. 20 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level remains around 1200 m.

Monday

Mostly cloudy. 10 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level remains around 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.

Problems

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.