The "teacups" idea sounds pretty good, here are a few suggestions/ideas I have for them:
-Name: Storm Swirl or Storm Swirler
-I can see the cars go two ways, one as proposed have each car be a "weather" object or could they not be themed to be weather research pods that are being sent up into a storm unlike no other, one that has been created by many different types of storms being swirled together. We seem to have had a very scientific theme to the pavilion so far, and while I like the rain drop, snowflake ect, it might seem odd to be riding in them. One obvious solution is that you were shrunk to the size of them, but then like the wind and tornado cars would have to be cut, it just seems easier to have "pods" in fact they could even have a clear plastic lid that could close on top of them.
-I would also suggest that the whole ride be put inside a dome. So that images could be projected onto the inside of the dome, of a swirling storm and other weather effects.
BTW: I do all of my diagrams on Power Point