South Columbia

Forecast snow and moderate southwest wind will form wind slabs on lee features at treeline and above.

Danger may be considerable in localized areas that receive more than 20 cm of new snow.

Moderate

• We are uncertain about forecast snowfall amounts.

On Sunday, a couple of cornice failures up to size 3 were reported on north and east aspects in the alpine.

Numerous naturally triggered wet loose avalanches up to size 3 were also reported on very steep, sunny aspects in the alpine.

Observations are currently very limited in this region. Please consider submitting a MIN to let us know what you're seeing out there.

Forecast snow and moderate southwest wind will form fresh wind slabs on lee features at treeline and above. The new snow will cover a hard crust that exists on all aspects to at least 2700 m.

Crusts from late March can be found down 20 to 80 cm, depending on elevation/aspect.

The mid and lower snowpack is well settled and strong in most areas.

Monday Night
Cloudy. 3 to 15 cm of snow above 1600 m (rain below). 40 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1900 m.

Tuesday
Cloudy. 5 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1600 m.

Wednesday
Mostly cloudy. 10 to 20 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1600 m.

Thursday
Mostly cloudy. 30 km/h north ridgetop wind. Treeline temperature -6 °C. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

• Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
• Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
• Use ridges or ribs to avoid areas of wind-loaded snow.
• Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.