North Columbia

Human-triggered avalanches are likely.

Stay in simple terrain and use safe travel habits.

A widespread natural and human-triggered avalanche cycle has occurred since Friday. Expect avalanche activity to continue through the forecast period.

Up to 60 cm of new snow has fallen on a variety of old surfaces. There is surface hoar, more prevalent around treeline and below, a crust on sun-facing slopes, and 20 to 30 cm of low-density faceted snow in sheltered areas.

Dry January conditions have created a weak, faceted upper snowpack with multiple surface hoar and crust layers. The new snow will likely not bond well with these layers.

The lower snowpack remains generally well-settled and strong.

Sunday night

Cloudy with 0 to 2 cm of snow. 10 to 20 km/h southeast ridgetop winds. Treeline temperature - 15 °C.

Monday

Cloudy with 0 to 2 cm of snow. 10 to 20 km/h southeast ridgetop winds. Treeline temperature -15 °C.

Tuesday

Mostly cloudy. 10 to 20 km/h southeast ridgetop winds. Treeline temperature -17 °C.

Wednesday

Mostly cloudy. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -18 °C.

More details can be found in the Mountain Weather Forecast.

• Be aware of the potential for human triggerable storm slabs at lower elevations, even on small features.
• Conservative terrain selection is critical; choose gentle, low consequence lines.
• Give the new snow several days to settle and stabilize before pushing into bigger terrain.