How we got here
It started with a forecast that got it completely wrong.
[Two or three sentences. Where you met, what the weather was doing, the detail only the two of you would think to mention.]
[A second paragraph if you want it — the proposal, the move, the dog. Keep it shorter than feels right. People are here for the address and the start time, and they'll like you more for getting to the point.]
[Close with the invitation itself.]