Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Backcountry travelers can easily trigger avalanches on steep slopes. Slopes with recently wind-drifted snow are the most dangerous. The strong winds may form drifts farther below ridgelines than you expect. They may be wrapped around terrain features in unusual ways. You will find drifted snow on some open slopes below treeline, too. Drifts may be smooth, pillow-like, show textured scallops, or feel chalky and hard. Shooting cracks and audible collapses are obvious indications to avoid steep slopes. Choose wind-sheltered slopes or ones less than 30 degrees in steepness.