Sorry, I can't help you with your question.
I also live in Pennsylvania and I'm starting to wonder if the snow is ever going to melt. We just keep getting more and more...
When you finally remove the snow/ice from your slides, let us know if you had any problems.
I've seen the question asked before, should you leave your slides in or out during snow events.
Some say it's okay to leave them extended, it will cause no harm.
Others recommend pulling them in when it snows.
You are going to have first hand knowledge. Please post and let us know if you had any damage or problems.
I hope you have no problems.