Conditions vary significantly throughout the region. If you're venturing to deeper snowpack areas on the western side of the region where the avalanche danger may be higher, consider also checking the neighbouring South Columbia bulletin.
Confidence
Moderate - Due to the number of field observations
Weather Forecast
On Sunday expect light flurries and moderate southwest ridgetop winds. On Sunday night the winds will become strong with 3-5 cm of new snow expected overnight. Light flurries and a mix of sun and cloud are forecast for Monday and Tuesday.Freezing levels should remain at valley bottom for the forecast period. For a more detailed weather overview, check out our Mountain Weather Forecast at avalanche.ca/weather.
Avalanche Summary
Pockets of wind slab to size 1.5 continue to be triggered naturally or under light loads on a variety of aspects in the alpine. Loose dry snow continues to be reported falling naturally from steep terrain up to size 1.5.
Snowpack Summary
Light and dry new snow has been transported into stiff wind slabs that are 10-20 cm deep in the alpine and at treeline. The upper snowpack is generally loose and unconsolidated in sheltered areas sitting on a mix of surface hoar, facets, and sun crusts that were buried January 4th. Some operations continue to track deeper buried surface hoar from early December. While test results on deeply buried surface hoar continue to show planar results when hard forces are applied, there have not been any avalanches reported failing on this layer. I have removed the persistent weak layer problem from the front page, and we will continue to monitor reports from operators in this region. The mid and lower snowpack is generally well settled and strong.
Problems
Wind Slabs
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.