The recent storm snow is likely still reactive to human triggering, especially in wind-loaded terrain at higher elevations.
Cornices are large and fragile following the recent stormy conditions. Use caution around cornices, particularly during periods of sun.
Multiple weak layers buried up to 2.5 m have produced very large avalanches recently. While the likelihood of triggering these layers is now pretty low, they still deserve respect until we have more post-storm information.
The recent storm snow is expected to remain reactive to triggering at high elevations where a crust is not present on the surface. This storm snow will be most reactive in wind loaded areas.
The recent atmospheric river weather event resulted in a widespread avalanche cycle which ended on Friday. Avalanches occurred on all aspects and elevations, and were a mix of slab and loose, wet and dry. Avalanches up to size 4 were observed and many were running full path to valley bottom.
While natural avalanche activity has now tapered off, it may still be possible to trigger avalanches, especially above the rainline where the snow surface remained dry.
Up to 20 cm of snow over the weekend has buried a widespread crust present in all but high alpine terrain. Above approximately 2200 m, 100 cm or more of recent storm snow has accumulated, accompanied by strong winds.
Deeper weak layers remain in the snowpack but are now much less likely to be triggered, particularly where a supportive crust exists just below the surface.
Sunday Night
Partly cloudy. 1 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -7 °C.
Monday
Mostly sunny. 30 km/h southwest ridgetop wind. Treeline temperature -6 °C.
Tuesday
Mostly cloudy. 10 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -4 °C.
Wednesday
Mix of sun and clouds. 5 to 15 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -3 °C.
More details can be found in the Mountain Weather Forecast.
