Kootenay Boundary

Use Extra caution as you venture into wind effected terrain.

Recent storm snow may not have bonded yet to the underlying surface.

A few rider triggered size 1 dry loose avalanches and storm slabs were reported on all aspects at treeline and above over the past couple days.

15 to 25 cm of recent snow may still be available for wind transport. This snow overlies predominantly crusty surfaces, except for northerly aspects at upper elevations. The snow surface will become moist at lower elevations as the freezing level rises.

A weak layer of surface hoar is down 30-60 cm in isolated, sheltered areas at treeline.

A widespread crust with sugary facets above is buried 80-180 cm deep. Steep or convex terrain features with a shallow or thin to thick snowpack at treeline and above are the most likely places to trigger this layer. However, when a thick surface crust is present, human triggering this layer is unlikely.

Monday Night

Mostly cloudy with around 5 cm of new snow. 15 to 30 km/h west alpine wind. Treeline temperature -4°C.

Tuesday

Mostly cloudy with up to 5 cm of new snow. 15 to 30 km/h west alpine wind. Freezing level rising to 1800 m.

Wednesday

A mix of sun and cloud with trace amounts of new snow. 20 to 40 km/h southwest alpine wind.  Freezing level rising to 1600 m.

Thursday

Cloudy with up to 15 cm of new snow. 20 to 40 km/h southwest alpine wind.  Freezing level rising to 1600 m.

More details can be found in the Mountain Weather Forecast.

• Use small low consequence slopes to test the bond of the new snow.
• Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
• Recent wind has varied in direction so watch for wind slabs on all aspects.
• Cornice failure may trigger large avalanches.
• Back off slopes as the surface becomes moist or wet with rising temperatures.