If the trebuchet is breaking the sound barrier, a small fleet of trebuchets set in place on the snowfield and set off in an appropriate wave beam, could provide less explosive-manufacture-distribution-usage solutions to the problem.

I could imagine this thing gets even more efficient and resilient, attains some kind of wind or sun-based auto-recharging mechanism, and then deployed on mounted areas to shock-wave snow layers. Yes, its possible, no its not real until someone does it. I could imagine it being done.

Note: I also like the idea of not having to use explosives, is the starting base. If you would prefer to blow stuff up, that's not what I'm talking about.

The evolution of this technology towards an automated, resilient, field-portable version would be interesting. Imagine having a 6-pack of them.