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Avalanche Forecast

Archived

Jan 31st, 2025–Feb 1st, 2025

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
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.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Sea To Sky, Homathko, Spearhead.

Fresh snow sits over unstable surfaces, creating dangerous avalanche conditions. Stick to simple, low angle terrain and avoid overhead hazard.

Confidence

High

Avalanche Summary

Observations have been limited during the storm. On Friday storm slabs were reported size 1-1.5. They were triggered naturally, by skiers, explosives and vehicles. Some were triggered remotely or sympathetically.

Storm slab size will increase as snowfall continues overnight.

Snowpack Summary

Light snowfall continues. 30 to 50 cm of new snow has accumulated since Thursday night. Near ridgetops, moderate to strong southwest wind has loaded new snow into leeward terrain features. The new snow is not expected to bond well to underlying surfaces including a hard crust, facets and/or surface hoar.

The mid and lower snowpack is well-settled and dense with no layers of concern.

Weather Summary

Friday night

Cloudy with 10 to 20 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature dropping from -3 to -10 °C. Freezing level dropping from 1000 m to valley bottom.

Saturday

Cloudy with 5 to 10 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Sunday

Cloudy with 5 to 10 cm of snow. 20 to 30 km/h southeast ridgetop wind. Treeline temperatures -11 °C.

Monday

5 to 10 cm of snow overnight then a mix of sun and cloud. 20 km/h southeast ridgetop wind. Treeline temperatures -13 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
  • Don't let the desire for deep powder pull you into high consequence terrain.
  • Closely monitor how the new snow is bonding to the old surface.

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.