Incantation : FUJITSA (loud and clear)
Wand movement: Counter clockwise rotation pointing opponent or obstcle
Effect: Creates a wind. This spell can be used to generate winds of different varities and intensities- from a gentle breeze to a violent whirlwind. Also this spell can be combined with some other spells( of which currently I have no idea) to create thunderstorms or even tornados. But these are advanced magic and are beyond the scope of hogwarts students.
Inspiration: The wind was one of the things that I liked the most. In beautiful evenings, I used to stand, feeling the wind and forgetting myself. I have also seen the ferocious face of wind. It always amazed me and the need to create a spell to summon the wind has always been in my dreams.