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Avalanche Forecast

Archived

Mar 2nd, 2025–Mar 3rd, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Sea To Sky, Brandywine, Garibaldi, Homathko, Spearhead, Tantalus.

Sunny aspects may soften this afternoon, providing the best riding conditions but also heightened avalanche danger. Buried weak layers remain triggerable and high consequence.

Confidence

Moderate

Avalanche Summary

Avalanche activity on Saturday was predominantly small loose wet up to size 1.5 out of steep, rocky solar aspects. In a few cases, these slides triggered larger persistent slab avalanches on slopes below.

Last week, a flurry of very large, scary persistent slab avalanche activity was reported at alpine and treeline elevations. Naturals and remotely triggered slabs size 2 to 3 showed wide propagation, with crowns 50 to 100+ cm deep.

Snowpack Summary

A widespread surface crust exists on most aspects and elevations.

60 to 80 cm of well-settled snow sits over a weak layer of facets and surface hoar buried in mid February. As of Friday, snowpack tests in the Spearhead zone indicate this layer may finally be starting to gain strength.

Another weak layer, from late January, is buried 80 to 120 cm deep. This may present as a crust on sunny slopes, sugary facets in most places, and surface hoar in sheltered spots. Large natural, remote and human-triggered avalanches were reported on this layer last week.

For more details, check out Zenith's snowpack update from Friday.

Weather Summary

Sunday night

Partly cloudy. 10 to 20 km/h northeast ridgetop wind. Treeline temperature 0°C. Freezing level 1600 m.

Monday

Sunny. 10 to 20 km/h southeast ridgetop wind. Treeline temperature 0°C. Freezing level 1600 m.

Tuesday

Mostly cloudy. 30 to 50 km/h southeast ridgetop wind. Treeline temperature -1°C. Freezing level 1500 m.

Tuesday

10 to 15 cm of snow. 20 to 40 km/h south ridgetop wind. Treeline temperature -3°C. Freezing level 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present and have produced recent large avalanches.
  • Keep in mind that human triggering may persist as natural avalanches taper off.
  • Uncertainty is best managed through conservative terrain choices.

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.