Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
New and wind-loaded snow has added stress to buried weak layers formed during the month-long dry period in January. Triggering hard slab avalanches up to 3 feet deep is possible and more likely on N-NE aspects above 9,000'. Both wind-loaded and sheltered terrain should warrant caution due to the spotty distribution of the buried surface hoar and weak facets.
These slabs were triggered by snowmobilers near Grouse Mountain. Similar, but deeper, avalanche activity is possible on very steep, shaded slopes today.
2/12/2026