Below I have pasted in the transcript from a test audio. Captions.
We have a
tensile failure, a tension failure so the slab itself has to tear and rip.
And then at the bottom of the slope we have to have a
compressive failure… basically the bottom has to pop out.
OK.All right, so here’s kind of one way of looking at this.
in order to have an Avalanche,you have to have what?
We have connected snow,that’s giving us traction,
that’s giving us support.So that we’re on top of something dense
enough to carry our weight.And then it has to be sitting on
unconnected snow. Whether it’s Facets or Depth hoar or
Surface hoar or an icecrust, whatever it is.
Maybe it’s just fresh snow on old snow or
whatever, but it has to have an unstable layer.
And then it has to be so uniform that once it triggers, it can actually propagate
because if its patchy,then it can’t go anywhere.
It has to be uniform.
And then there has to be some kind of stress,
whether it’s human trigger or artificial trigger or a human or natural trigger.
There has to be some stress that overcomes any strength.
And here’s the deal.
We survive lots of dumb decisions,
all of us, probably,because we’ve been out there riding on the hills
and not really understanding the risks we are taking because the hills are generally stable.
Right.But we need to recognize it’s really
And then we need to respect that. And so that’s why..??
OK,we gotta finish the rest of that question.
So here’s what I want you to do now
Take your arm and make a fist and drop it down like this.
So here’s a slope.
Now, take your other hand and support that slope.
Right, so this is a supported slope, now take your bottom hand away, and now its an unsupported slope.
Now I want you to imagine your knuckles here are a cliff face.
And this is a rocky cliff face.Cliff faces are unsupported.
There’s nothing holding the snow on the slope except for what?
Friction or shear strength. Now, if this snow above this rock face goes up
and over the hill then what else do you have holding the snow in place?
Well, what if my slope ends in rocks and starts in rocks?
What’s holding it only the slope, only friction or shear strength.
To me this is a no go.
I don’t know, my risk tolerance
says, you know what.
If I can avoid it at all, I am not going to sidehill across a rock face.
And my attitude is that I’m relying so
much on the structure of that snow to hold itself together.
And if I fail and I make a bad decision and this releases, the consequences of that decision
are maybe worse than I am ready to deal with. So, therefore in my good old,
little decision making tree up here,that’s kind of one of those things that…
you know what… I’m not interested.If I can, I’ll go ride somewhere else.
Ok, unsupported slopes. Let’s take a look at this.
So here’s a slope,
and this is a really big slope. So you see these little tiny dots.