Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 1–2
You can trigger avalanches on steep slopes filled in by drifted snow at upper elevations. New snow and strong westerly winds on Tuesday will add to the size of any triggered avalanche. An avalanche that you trigger in drifted snow can be difficult, especially if it breaks more deeply into the snowpack. Identify and avoid steep slopes with recently drifted snow, especially if you observe cracking in the snow or hear sounds of the snowpack collapsing.