Avalanche Forecast
Issued: Dec 28th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
Avalanche Canada,
Avalanche Canada
Seek out low-angle, sheltered terrain for good riding.
Wind slabs could step down to buried crusts producing very large avalanches.
Summary
Confidence
Moderate
Avalanche Summary
Observations have been limited in this region. Riders on Friday reported triggering a small wind slab on a steep slope at Burnt Ridge, as well as avoiding wind-affected snow in the alpine. Riders on Thursday reported avoiding ridgetop drop-ins because of the presence of slabby snow conditions.
Looking ahead, expect that wind slabs will continue to be reactive to human triggering.
Please consider sharing your observations to the Mountain Information Network (MIN).
Snowpack Summary
20 to 30 cm of new snow overlies a melt-freeze crust up to 1900 m. Recent snow has been transported by moderate to strong south and southwesterly winds, building reactive cornices and slabs on lee slopes.
This overlies a further 20 to 50 cm of snow which may be poorly bonded to another melt-freeze crust, 60 to 100 cm deep. A layer of surface hoar may exist just above this crust in sheltered terrain at treeline. Failures on this layer could result in very large avalanches.
Snow depths at treeline vary between 90 to 160 cm.
Check out this MIN report of conditions.
Weather Summary
Saturday NightCloudy with up to 5 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -6 °C.
Sunday
Partly cloudy. 10 km/h southeast ridgetop wind. Treeline temperature -6 °C.
MondayPartly cloudy with trace precipitation. 10 to 30 km/h southwest ridgetop wind. Treeline temperature -7 °C.
Tuesday
Partly cloudy. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -8 °C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
- Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
- Use small, low consequence slopes to test the bond of the new snow.
- Be aware of the potential for large avalanches due to buried weak layers.
Problems
Wind Slabs
Watch for convex rolls, corniced ridgelines, and cross-loaded slopes, where the wind has transported snow into deeper deposits.
Avalanches could fail or step down to buried crusts in the snowpack, creating very large avalanches.
Aspects: North, North East, East, South East, South West, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 29th, 2024 4:00PM
