Going with WW.
Why? I think he can cause greater overall destruction, while Storm has more finite control, maybe. But i doubt she can pull off finite concentration in the middle of the chaos WW can bring about, and she wont out muscle him in that respect.
Storm wins. She can also control the elements in people's bodies. She has been able to control the pressure inside of T'challa's body when he was possessed by the Shadow King to hurt him. She has also been able to control the air in people's lungs. Given that she can create tornadoes that fit in the palm of her hand, she could duplicate WW tornado in the stomach feat since she can control the internal air, heat, pressure, etc in matter.
__________________ Ann Nocenti writes on Storm: "At her command oceans rise, tornadoes destroy, rains pummel, breezes cool, sun dries, seas part!"
This is not so. Storm can control hemisphere-sized hurricanes, continent-sized blizzards and more. He's not going to outmuscle Storm in overall destruction.
__________________ Ann Nocenti writes on Storm: "At her command oceans rise, tornadoes destroy, rains pummel, breezes cool, sun dries, seas part!"
From what i (quickly) researched this morning, i found them closely matched, with WW stronger. The scans provided then showed he has fine control.
I still have to go with my initial opinion here.
Storm has also absorbed lightning before and it made her stronger. Storm wins because Weather Wizard needs to breathe and can be frozen at any moment. I don't believe he has any defenses against flash freeze or being suffocated.