Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–1.5
Your chance of triggering an avalanche increases on slopes where new snow and wind combine to form a cohesive slab on top of older weak snow. You could trigger an avalanche if you find 8 inches or more of new or drifted snow on a slope steeper than about 35 degrees. Loose snow avalanches may become easier to trigger or larger with only a small amount of new snow.
If you see signs of instability, such as cracking, collapsing, or easily triggered loose avalanches, consider moving to lower-elevation and lower-angle slopes.