You can see my chart in my signature. As far as dips are concerned, as you can see, I have quite a few of them, and my lowest one isn't always O day. I don't know if it's the same for other. Your rise should be the day after o, but it's not always a big jump right away, that's why you usually need 3 high temps to confirm you did ovulate.
For me, AF doesn't give me much of a warning. I usually have my dip in temp the day OF, so I never really know ahead that the 2 weeks wait was a bust!