Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
You can trigger an avalanche in drifted snow at upper elevations. Cracking in the surface snow is an indication to avoid steep slopes. Go around rounded pillows of drifted snow where you find them below ridges, in gullies, and behind convex rollovers. You might not see any signs of instability before you trigger an avalanche. Avoiding these pillows and seeking out lower-angled slopes are ways to reduce your hazard.