Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Mar 10th, 2024–Mar 11th, 2024

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 unlikely, human triggered possible.

Regions

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

Choose conservative, low-consequence terrain and avoid exposure to overhead hazard.

Recent large avalanches in the region indicate the snowpack remains very unstable.

Confidence

Moderate

Avalanche Summary

Frequent large and very large, accidental and remotely triggered avalanches continue to occur across the region. Some have been triggered from low-angle or flat terrain onto adjacent or overhead slopes.

We expect the potential for riders to trigger avalanches will remain elevated over the following days.

Snowpack Summary

30 to 70 cm of recent storm snow combined with southerly wind has formed reactive slabs across the region.

At lower elevations, the upper snowpack may be moist or crusty.

Several persistent weak layers are buried between 70 and 150 cm deep. These weak layers include hard crusts with overlying weak facets and surface hoar. Avalanches continue to fail on these layers.

Weather Summary

Sunday Night

Cloudy, with 3 to 7 cm of snow expected. 35 to 55 km/h southwest ridgetop wind. Treeline temperatures dropping to -6 °C.

Monday

Mostly cloudy, with 0 to 2 cm of snow expected. 50 km/h southeast ridgetop wind. Treeline temperatures around - 1 °C. Freezing level rising to 1100 m

Tuesday

Mostly cloudy, with 2 to 5 cm of snow expected. 40 to 50 km/h south ridgetop wind. Treeline temperatures around 0 °C. Freezing level rising to 1300 m

Wednesday

Cloudy, with 5 to 10 cm of new snow expected. 50 to 80 km/h southwest ridgetop wind. Treeline temperatures around 1 °C. Freezing level rising to 1600 m

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Remote triggering is a big concern, be aware of the potential for wide propagations and large, destructive avalanches at all elevations.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Caution required around non obvious avalanche terrain like road cutbanks, cutblocks and other non obvious avalanche terrain
  • Be especially cautious as you transition into wind affected terrain.

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.

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.