Haines Pass

Triggering large storm slabs on weak facets is most likely in wind affected terrain.

Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.

Low

• We are uncertain due to a limited number of field observations.

On Friday, around 30 cm of recent storm snow sitting on a crust/facet layer was reactive to skiers on small test slopes at treeline. See MIN.

Observations in this region are extremely limited. If you head out into the backcountry, let us know what you're seeing by submitting a MIN report.

Cornices are large and looming. Avoid traveling underneath them.

30 to 40 cm of recent snow and strong winds have formed storm slabs over a weak layer of crust/facets that have recently been reactive to human triggers.

There are multiple persistent weak layers of facets or crust/facets combinations in the top 100 cm of the snowpack. These layers are most likely to trigger in wind affected areas with a shallow or thick to thin snowpack.

Saturday Night
Mostly cloudy. 3 to 10 cm of snow. 40 km/h southeast ridgetop wind. Treeline temperature -8 °C.

Sunday
Mix of sun and clouds. 0 to 3 cm of snow. 30 km/h southeast ridgetop wind. Treeline temperature -9 °C.

Monday
Mix of sun and clouds. 20 km/h east ridgetop wind. Treeline temperature -11 °C.

Tuesday
Mix of sun and clouds. 30 km/h east ridgetop wind. Treeline temperature -11 °C.

More details can be found in the Mountain Weather Forecast.

• Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
• Be aware of the potential for large avalanches due to buried weak layers.
• Be especially cautious as you transition into wind-affected terrain.
• Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
• Cornice failures could trigger large and destructive avalanches.