Avalanche Forecast
Issued: Mar 6th, 2025 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs and Storm Slabs.
Avalanche Canada,
Avalanche Canada
Avoid large, steep features where triggering the persistent problem is still a concern.
Patience and conservative terrain choices are recommended.
Summary
Confidence
Moderate
Avalanche Summary
On Wednesday, south of Revelstoke there was a large (size 3) natural persistent slab avalanche on a south aspect at 2500 m. It's suspected to have failed on the late January weak layer.
There were also a few large (size 2) natural and rider-triggered storm slabs that were 20 to 30 cm deep. As well as many small (size 1-1.5) dry loose avalanches, both natural and rider-triggered.
Snowpack Summary
10 to 15 cm of new snow sits on a 3 to 5 cm thick melt-freeze crust that is everywhere except north facing slopes above 2000 m.
A weak layer, composed of facets, surface hoar, or a crust, is found 20 to 60 cm deep. Another persistent weak layer, buried in late January, lies 50 to 110 cm deep. This layer is surface hoar, facets, or a crust, depending on the aspect.
The remaining snowpack is well-settled and strong.
Weather Summary
Thursday Night
Mostly clear skies. 20 to 30 km/h west ridgetop wind. Treeline temperature -8 °C.
Friday
Mix of sun and clouds. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1800 m.
Saturday
Cloudy with 10 to 20 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1600 m.
Sunday
Cloudy with 20 to 40 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.
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.
- Be mindful that deep instabilities are still present in the snowpack.
- Uncertainty is best managed through conservative terrain choices.
Problems
Persistent Slabs
Weak layers from January and February persist within the upper 100 cm of snow. Natural avalanche activity has tapered off, however, human-triggering the persistent layers remains a concern.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Storm Slabs
Surface hoar crystals and/or a crust may cause the storm slab to take longer than normal to heal.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 7th, 2025 4:00PM
