The movies didn't really develop her character much. She's had some interesting adventures. For instance, one time Colossus was getting beat by this villain who could absorb any brute force you threw at him and hit you back with it, but Storm figured out a way around that by making the air around him freeze :) Another time Dracula was summoning lightning bolts at the X-Men, but Storm one-upped him :) She's probably the most potentially powerful X-Man after Phoenix and Professor X.