Sunday's posted avalanche danger ratings are an average for the region. Actual avalanche danger may be HIGH in the south of the region where heavy snowfall is forecast.
Confidence
Fair - Forecast snowfall amounts are uncertain on Sunday
Weather Forecast
Sunday: Moderate snowfall with heavy accumulations forecast for the south of the region (Coquihalla, Alison Pass) / Strong southwest winds / Freezing level at about 1300mMonday: Mix of sun and cloud / Moderate west winds / Freezing level at valley bottomTuesday: Clear skies / Light north winds / Alpine temperatures of about -18.0
Avalanche Summary
There is no new avalanche activity to report. I would expect a round of storm slab activity with weather forecast for Sunday.
Snowpack Summary
Reports suggest there is about 50cm of snow at 1600m in the Duffy Lake area, and about 100cm at the same elevation on the Coquihalla. Terrain below treeline is reported to be mostly below threshold.A developing storm slab now overlies a generally well settled snowpack. Closer to the base of the snowpack you may find a few crusts which may have associated facets at higher elevations. Observers are not identifying any of these as cause for concern at this time, although they might be worth exploring.
Problems
Storm Slabs
Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.