Purcells

The deep persistent slab problem continues to be reactive up to size 3 with larger triggers such as explosives. Rider triggering is possible especially in shallow snowpack areas like rocky outcrops or near small trees.

Friday: Light precipitation. Alpine temperatures -2. Moderate to strong southwesterly winds switching to northwest in the afternoon. Freezing level 1500mSaturday: Mainly dry with broken skies, winds moderate to strong from the northwest and alpine temperatures -7.Sunday: Light snowfall, alpine temperatures -9, winds light to moderate from the northwest.

Fair - Track of incoming weather systems is uncertain on Friday

Up to 25 cm of new storm snow covers stiff, dense wind slabs in exposed lee terrain at and above treeline. Average snowpack depths at treeline elevations are 100-130 cm. In the upper 80 cm of the snowpack a couple persistent weak layers exist, comprising of surface hoar and a facet/crust combo. This interface has produced variable results with snowpack tests, and operators are keeping a close eye on them as the load above increases and/or a slab develops.A bigger concern, especially in the Northern part of the region where the snowpack is thinner and more variable is weak faceted and depth hoar crystals combined with a crust from early October. This is now down around 80-120 cm. This deep persistent weakness may be stubborn to trigger, especially in deeper snowpack areas, but the sensitivity to triggers likely increases in shallower locations, especially on steep, convex, north-facing slopes.