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Avalanche Forecast

Archived

Feb 10th, 2025–Feb 11th, 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, Jordan, North Selkirk, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold, Kokanee, Retallack, Valhalla, Whatshan.

Continue to assess steep slopes for stiff, cohesive slabs that may be poorly bonded to weak layers below.

Confidence

High

Avalanche Summary

Since the avalanche cycle at the beginning of February, reports of avalanche activity have gradually declined. Over the weekend, only a few small (size 1 to 1.5) explosive and skier-controlled avalanches were reported.

Snowpack Summary

Around 40 to 60 cm of snow accumulated last week and is beginning to facet and develop surface hoar in protected areas. Variable wind-affected surfaces can be found in exposed terrain at treeline and above. Snow remains unconsolidated and low-density in wind-sheltered terrain. The recent snow has buried various layers that it may not bond well to, including faceted grains, surface hoar crystals, and a hard melt-freeze crust on sun-exposed slopes.

The middle portion of the snowpack between approximately 50 and 100 cm deep is faceted with numerous other layers of surface hoar and/or crusts that formed over January.

The lower snowpack is well-settled and strong.

Weather Summary

Monday Night

Clear skies. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -18 °C.

Tuesday

Mostly sunny. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -18 °C.

Wednesday

Sunny. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -16 °C.

Thursday

Sunny. 10 to 20 km/ south ridgetop wind. Treeline temperature -14 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.
  • Surface hoar distribution is highly variable. Avoid generalizing your observations.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.

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.