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Avalanche Forecast

Archived

Mar 10th, 2025–Mar 11th, 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

North Columbia, South Columbia, Glacier, Esplanade, Jordan, North Selkirk, Dogtooth, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold.

Choose conservative, low consequence terrain and give the storm snow more time to settle

Recent snowfall amounts are variable, continuously assess and verify conditions

Confidence

Moderate

Avalanche Summary

A natural avalanche cycle took place on Sunday with storm slab avalanches on all aspects and elevations. These avalanches ranged in size from 1 to 3. Numerous rider triggered avalanches were also reported, these were generally up to size 2.

Snowpack Summary

Recent snowfall amounts in the region are variable, 20 to 70 cm has fallen with strong southwest winds, forming deeper deposits on north and east aspects. This new snow overlies a crust on all aspects and elevations except north facing slopes above 1800 m. Surface hoar can also be found near this interface on sheltered features.

A weak layer, composed of facets, surface hoar, or a crust from mid February, is found 50 to 100 cm deep.  Another weak layer from late January is just below.

The remaining snowpack is well-settled and strong.

Weather Summary

Monday Night

Mostly cloudy with up to 10 cm of snow. 20 to 40 km/h south ridgetop wind. Treeline temperature -5 °C.

Tuesday

Mix of sun and cloud with 0 to 5 cm of snow. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Tuesday

Mix of sun and cloud with trace amounts of snow. 10 to 30 km/h south ridgetop wind. Freezing level rising to 1800 m.

Wednesday

Cloudy with 5 to 15 cm of snow. 20 to 50 km/h south ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Make observations and continually assess conditions as you travel.
  • Be especially cautious as you transition into wind-affected terrain.

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.