lupercalia
I think tarot can be used to predict a future - that is, the future the querent is currently heading towards, given their current actions. Not to get into multiverse theory or anything here, but I don't think the future is ever a fixed point that can be determined precisely (except in rare cases), whether by tarot cards or anything else. Meteorology isn't actually a bad comparison, since in both weather and lives the future is a matter of 'if x then y' most of the time - and if x changes, so does y.