"Months before"? If your weather app is only a few months old, then you are far from the first person to do what you're describing. I had an app on my iPad that provided exactly the experience you're describing, and that was I think at least 2 years old (I don't remember the name anymore).
That's only one small part of the story. I think the main thing here is that he had an app that he worked on that was rejected because Apple felt nobody wanted it, and then a few months later Apple releases pretty much the same thing itself and everyone loves it.
It's not that Apple felt nobody wanted a weather app, it's that there are a lot of weather apps on the store already. The App Store guidelines do tell you that apps that replicate existing functionality may be rejected. And Apple already had a weather app, all they did was update it to be better.
I can't claim I'm the first, but it's the first I've seen, as I did extensive research before I wrote a line of code. Send a link if you have one. I'm interested. I think a lot of people are misunderstanding that I'm talking about procedural graphics though, not a video or simple animation.
Weather+ is somewhat like this. It uses HD video clips, not vector art, but it accomplishes a similar task. It has been around for a couple of years at least.
