Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Isolated areas in the Northern Wallowas hold the potential to trigger a large avalanche failing on weak snow that sits under a slab. To avoid this avalanche look out for: shallow snowpack areas (less than 4 feet of total snow), trigger points when in terrain greater than 35 degrees (steep convex rollovers and rocky zones), and areas that harbor a stout crust with weak snow around the crust and a slab above.
Check out the recent observation from the Chief Joseph area here.