No problem.This is my 1st yr with it. Mines gotta stay outside too. Jammed garage.
Good thing is you cut hole for antenna and they provide a reinforcing patch for the hole. Water repellant (not waterproof) UV resistant. I dont believe you can get a "waterproof" cover. They all have to breathe.
The one from Jegs has a thin PVC outer shell. It really does a great job keeping water out, but rips on the corners easily. It breaths through the seams. All the fabric ones turned to dust in about six months on me.