Avalanche Forecast
Issued: Jan 17th, 2025 4:00PM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeAssess for wind slab as you move through terrain.
Lingering wind slabs may remain reactive to human-triggering in isolated locations below alpine ridgetops.
Summary
Confidence
Moderate
Avalanche Summary
No new avalanches were reported on Thursday.
Evidence of a natural loose wet avalanche cycle from Wednesday is still visible. These avalanches were triggered by above 0°C temperatures in the alpine and solar radiation. Avalanche activity has subsided with colder temperatures.
Snowpack Summary
A few centimeters of faceting snow covers a melt-freeze crust on all aspects at all elevations. Except on northerly aspects above 1900 m, where soft snow may still be found.
A weak layer of surface hoar or facets is found 10 to 30 cm deep. This layer remains a concern where wind slabs have formed above it. This layer is active in snow pit tests north of the Sea to Sky highway.
An otherwise right-side-up snowpack appears to be bonding well to a crust buried 70 to 100 cm deep. The mid and lower snowpack is generally well-settled and bonded with no layers of concern.
Weather Summary
Friday Night
Clear skies. 25 to 45 km/h northwest ridgetop wind. Treeline temperature -12 °C.
Saturday
Mostly sunny. 15 to 30 km/h northwest ridgetop wind. Treeline temperature -8 °C.
Sunday
Sunny. 25 to 50 km/h north ridgetop wind. Treeline temperature -8 °C.
Monday
Mostly sunny. 15 to 30 km/h west ridgetop wind. Treeline temperature -6 °C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Wind slabs are isolated, but may remain reactive.
- The snowpack is generally stable; it may be appropriate to step out into more complex terrain.
- Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
- A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.
Problems
Wind Slabs
Isolated wind slabs remain a concern where they overlie a weak layer of facets or surface hoar and could still be reactive to human triggering. This issue seems to be most prominent in the Brandywine area.
Aspects: North, North East, East, South East, South.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Jan 18th, 2025 4:00PM