Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1.5–2.5
You can trigger an avalanche where you find more than about a foot of drifted snow. The most dangerous slopes face northerly and easterly at upper elevations. Avoid steep slopes with drifted snow even if you don't see shooting cracks or other signs of instability. An avalanche in drifted snow can step down to deeper layers in the snowpack creating a large and dangerous avalanche.
Though clouds look to move in during the afternoon, the intense April sun will warm the recent snow causing a rapid change. Loose Wet avalanches will become a concern on slopes steeper than about 40 degrees. These slides can run long distances in bigger terrain and can be powerful enough to carry you into terrain traps. Once the new snow becomes gloppy you should move to slopes with colder snow.