Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 1–2
Recent Avalanches: One week ago, last Friday, there was an avalanche fatality outside and northeast of our forecast zone near Lake George. There was some small wet loose activity on southerly slopes around 2,000' on Center Ridge on Monday. Two weeks ago, there were many natural and human-triggered avalanches 1-2' deep that occurred in the few days following the most recent storm. One of these buried and injured a person on Max's Mountain in Girdwood on March 21st.
After 2 weeks of calm weather, it has become unlikely that a person could trigger a large avalanche in this zone. Unfortunately, we still have the recipe for a large avalanche, with a slab that is 1 to 2' deep sitting on top of very weak snow that has adjusted to the weight in most places for now. It is hard to trust this type of weak snow (facets) despite the amount of time that has passed since a person has triggered an avalanche on one of these layers. This problem can be completely avoided by choosing low angle slopes or you can choose terrain that is clear of rocks, trees and gullies at the bottom to reduce the chance of serious consequences if the slope slides.
Dry Loose Snow Avalanches: Dry Loose avalanches are likely to be triggered by a person on any steep slope that is holding cold snow. Consider what is below if you get caught up in the sluff.
(3/31/2026)
This snowpit is from Fish's Breath on March 31 at 2,100' showing poor structure with weak snow below a slab. Test results were stable.
Photo submitted anonymously