Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
You can trigger a large and dangerous avalanche that breaks on weak snow buried near the ground. Above and near treeline, strong winds are drifting new snow on northeast to east through south-facing slopes. Near treeline, avalanches can grow large quickly and be very destructive. Safer travel options can be found on wind-sheltered slopes at lower elevations and by avoiding travel on or underneath slopes steeper than around 30 degrees where you find strong over weak snow.
On January 7, 2023, two snowmobilers died in a large avalanche near Corona Pass. You can read the preliminary accident report here. Our deepest condolences go out to the family and friends of the people involved in this tragic accident.