Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
In steep terrain at the mid and upper elevations large slab avalanches could be human triggered with depths to three feet. Avalanches are unlikely at the lower elevations.
Weak layers of faceted snow persist within the snowpack at the higher elevations and comprise the bulk of the snowpack in areas with a shallow snow cover. At the mid and upper elevations persistent weak layers may still be capable of failing due to the weight of a person. Slab failure may be more likely to be initiated on steep slopes by a larger triggers such as snowmachines and skiers or riders who hit a shallow weak spot in the snowpack. Avalanches are unlikely at the lower elevations except on isolated terrain features.
In steep terrain at the mid and upper elevations large slab avalanches could be human triggered with depths to three feet. Avalanches are unlikely at the lower elevations.
Dry conditions will continue into Saturday. Winds will slowly increase ahead of an approaching Pacific cold front and upper level disturbance. Temperatures inversion will continue overnight but could begin to mix out during the day as this front approaches. Chances for snow will increase in the south during the afternoon and will reach the other areas before midnight.The general avalanche hazard will continue to be moderate at the mid and upper elevations and low below an elevation of 7,500 feet. At the mid and upper elevations persistent slab avalanches one to three in depth could be triggered by humans on steep avalanche prone slopes. Avalanches are unlikely at the lower elevations.