Originally Posted by
Boissal
^^
Very true. The overall rating (moderate/high/whatever) has to due with the likelihood of slides. If you don't contextualize it with predictability & level on consequence you're in for a rough awakening.
I spend a fair amount of time skiing on considerable days when the main concerns are wind slabs and storm snow. I tend to regard those are predictable and manageable (within reason). By that I mean that you can (usually) tell where wind slabs tend to form based on wind patterns, they're (often) visible, you can (usually) approach them safely from above and trigger them on command via stomping at the top/edge, ski cuts, etc... Same goes for storm snow which, absent any risk of stepping down into older layers, tends so sluff/slide on the old snow below once the angle is sufficient. Again, none of this is absolute and a small wind pocket can fuck up your day even if you think you think have a perfect read on how it's going to behave. In general though a bad call under these circumstances doesn't carry an horribly severe penalty.
If we're talking considerable danger in the context of a PWL though, all bets are off. There are no tools to manage deep slabs other than leaving them be. They're too stealth, too patient, and too mean. All the tricks I've learned for dealing with wind slabs and new snow are useless at best and create a false sense of confidence at worst. I want to think I'm smarter than a wind slab but I know with 100% certainty that I'm dumber than a deep slab. And I also know that if ones takes a shot a me it will do so with extreme prejudice and I'm not likely to walk away. So, in my book, a moderate day with a PWL is significantly more problematic a considerable or even high day with wind/new snow problems.
The big issue in the Wasatch, and I think part of the reason we're seeing what we're seeing this season, is that we spend most of our seasons putzing around in a really user-friendly snowpack. It usually gives us good feedback, it's very clear with its warnings, and it requires a lot of provoking to react. We're so used to this that when we have to deal with a snowpack that isn't deeply sedated and responds to the slightest provocation shit hits the fan constantly. It won't stop until the WL is gone or bridged, or until everyone readjusts their perception based on reality vs historical data.