6:15 AM Update:
New snow and strong winds are building reactive slabs.
Carefully assess conditions as you travel.
Areas that receive less than 15 cm of new snow may only have MODERATE danger.
Wind slabs are expected to increase in size and likelihood throughout the day on Monday. These avalanches will be largest and most reactive on north and east aspects at treeline and above. Wind slabs may step down to deeper layers.
Several weak layers in the snowpack could be rider triggerable.
On Friday, there were several large (size 2) explosive triggered storm slabs on south to southeast alpine terrain.
On Thursday, several persistent slabs were remotely triggered above Sparwood. Also, there were a few large avalanches triggered with explosives near Castle.
By Monday afternoon up to 15 cm of fresh snow is expected. This new snow will be accompanied by strong to extreme southwest wind forming deeper deposits on north and east aspects. In sheltered terrain it could overlie a layer of surface hoar or a sun crust.
Several weak layers comprised of facets, surface hoar, or crusts could exist in the top 20 to 60 cm of the snowpack.
The mid and lower snowpack are well settled.
Sunday Night
Mostly cloudy. 2 to 5 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -6 °C.
Monday
Cloudy. 5 to 10 cm of snow. 70 km/h southwest ridgetop wind. Treeline temperature -5 °C.
Tuesday
Mostly sunny. 1 to 4 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -7 °C.
Wednesday
Mostly sunny. 1 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -7 °C.
More details can be found in the Mountain Weather Forecast.
