Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
You could trigger an avalanche where recent snow and winds built cohesive slabs above older, weaker snow on lee slopes at upper elevations. These avalanches are more likely in areas of drifted snow. Drifted snow often looks smooth or rounded and can sound hollow.
If you observe recent avalanche activity, cracking, or collapsing, this is a sign of unstable snow and a good indication to avoid steep slopes. You can find safer riding conditions in lower-elevation terrain sheltered by the wind.