Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
People continue to trigger large avalanches without warning signs like cracking or collapsing. Many tracks are on steep slopes but don’t assume this means a slope is safe. If you find a weaker area on these slopes, you can trigger a large, deadly avalanche that wraps around terrain features. Avalanches may stay close to the surface or step down to deeper weak layers. Thin rocky slopes are the most dangerous. You can find safer travel on slopes less than about 30 degrees without steep terrain above.