Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 4
The stretch of unusually warm weather should be good to help settle and consolidate the snow pack more. I'll be out in the backcountry today sniffing around and paying close attention to the buried persistent weak layer. Hopefully I'll see continued improvement. What I'm looking for is an increase in the stiffness of the buried sugary faceted weak layer. I'm also hoping that snowpit tests stop failing and propagating on the weak layer.
Persistent Weak Layer Summary, 2021-2022:
There was a foot or more of snow that fell in October.
This snow melted away on many slopes but it stayed on northwest, north and northeast facing slopes above about 8500'.
The snow that stayed turned into a weak sugary layer during dry weather in November.
We saw a large amount of snow in December which landed on top of the weak snow from October.
The weak layer of sugary faceted snow collapsed and produced avalanches under the stress of the large storms.
The weak layer is still present. We are monitoring it and are hopeful it will become more stable with time.