Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1.5–3
Recent snowfall has further stressed the January drought layer that's responsible for avalanches every day of the past week. Most of the avalanche activity prior to the recent winter storm has been on N and NE aspects above 7,500' but the 2.3 inches of water weight (in 12-16" new snow) could tip the balance towards instability on more aspects. This added weight of recent snow will also make the prime aspects (N-NE) even more reactive with even thicker slabs. The spotty distribution of these weak layers should be considered as you may not see avalanches or signs of instability in your travels before triggering a slab. Though weak layers have been most reactive on the West Side and south of the Pass, time will tell if the new load wakes up the January drought layer elsewhere.
Now is a good time to reel in your desires for steep slopes and rowdy lines until we better understand the behavior of the current snowpack. Recent avalanches have been triggered from a distance or from below. When local professionals are getting surprised, you should take that as a cue to choose a more conservative mindset. Today is no time to FAFO on consequential slopes, especially over terrain traps.
A very large skier triggered avalanche that occurred near Phillips Pass on 2/21/2026. The 5th rider on the slope triggered the smaller slab near the ridge that then triggered a much larger avalanche below the cliff band.
ENE at 9,200'
Photo: Bridger-Teton Avalanche Center