This is an archived forecast in relation to a serious incident on this day

Date Issued: Sunday, February 2, 2025 at 04:00
Valid Until: Monday, February 3, 2025 at 04:00
Prepared by: Avalanche Canada

Storm slabs sit over a weak layer and may be easily triggerable by riders.

Danger Ratings
Sunday
Alpine3 - Considerable
Treeline2 - Moderate
Below Treeline1 - Low

Terrain and Travel Advice

    - Keep your guard up as storm slabs may remain sensitive to human triggering.
    - Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
    - Use small, low consequence slopes to test the bond of the new snow.

Problems (1)

Avalanche Problem 1: Storm slab
What Elevation? Below treeline, Treeline, Alpine
Which Slopes? North, Northeast, East, Southeast, south, Southwest, West, Northwest
Chances of Avalanches? Possible - Likely
Expected Size? Small - Large

Storm slabs are not expected to bond well to underlying surfaces and will likely remain reactive to riders through the weekend.

Avalanche Summary

On Friday and Saturday, natural and skier-triggered storm slabs up to size 1.5 were reported on west to northeast aspects near treeline.

Snowpack Summary

30 to 50 cm of new snow has accumulated since Thursday night. Near ridgetops, southwest wind has loaded the recent snow into leeward terrain features. The recent snow is not expected to bond well to underlying surfaces including a hard crust in most areas, or facets and/or surface hoar on high north aspects.

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

Weather Summary

Saturday night

Cloudy with 5 to 10 cm of snow. 40 to 50 km/h west ridgetop wind. Treeline temperature -8 °C.

Sunday

Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperatures -8 °C.

Confidence: Moderate

    Uncertainty is due to the limited number of field observations.