Anytime I see Squall I think of Matsuda Seiko. It was one of my favorite songs off her debut album, which also happened to be called Squall.
When it comes to C-ute's song I really got a feeling of weather and rain from the opening instrumental. I do believe one of the things told to the fans going to the PV shoot was that there would be water and they would get wet. That fits in the theme.