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Avalanche Forecast

Archived

Jan 24th, 2025–Jan 25th, 2025

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

Regions

North Columbia, South Columbia, Blue River, Clearwater, Premier, Clemina, Esplanade, Jordan, North Monashee, North Selkirk, Robson, Central Selkirk, Gold.

Recent snow and wind slabs may overlie a reactive weak layer of surface hoar.

Avoid areas where the snow feels stiff or slabby.

Confidence

Moderate

Avalanche Summary

Human and naturally triggered wind and storm slabs (size 1 to 2) remain active across the region, primarily in the western Monashees. Most failures occurred on wind-loaded alpine slopes, with a few reported at lower elevations. Notably, some slabs failed on a buried surface hoar layer located 30 to 40 cm deep.

Due to slabs overlying weak surface hoar in some areas, we expect triggering of these slabs to remain possible for longer than usual.

Snowpack Summary

10 to 30 cm of low-density storm snow fell in the preceding days. This snow has buried a variety of surfaces including sun crust, surface hoar, and facets. The snow surface is likely wind-affected in most open areas at all elevations.

A secondary layer of weak surface hoar from early January is buried 30 to 50 cm. This layer has been reactive where a cohesive slab has formed over it.

A crust/facet/surface hoar layer from early December may be found 90 to 160 cm deep. Avalanche activity on this layer has tapered in recent weeks.

Weather Summary

Friday Night

Partly cloudy. 15 to 30 km/h northwest ridgetop wind. Treeline temperature -15 °C.

Saturday

A mix of sun and cloud. 20 to 30 km/h northridgetop wind. Treeline temperature -12 °C.

Sunday

Sunny. 15 to 25 km/h northwest ridgetop wind. Treeline temperature -7 °C, inversion forming.

Monday

Sunny. 20 to 35 km/h northwest ridgetop wind. Treeline temperature -6 °C, inversion

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.
  • Avoid areas where the snow feels stiff and/or slabby.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.

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.

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.