So concerning this! It’s interesting to say, but yes I think Nora does have some form of water manipulation, but not quite in the way you would think; like Lapis. After doing some research on Blue Diamond and her abilities I’ve come to a couple of conclusions.
Taken from the Steven Universe Wiki, it has been determined that Blue Diamond creates her clouds from her own tears, evaporated. We know that she has Psychokenisis in a blue like aura as well. I propose that if Blue was able to turn her liquid tears into clouds, in turn, Nora would be able to use her own tears as a sort of water control. Kinda messed up if you think about the concept for her future version. That’s not just water she’s holding, that’s her tears.