Weather Wizard

Mack Mardock a.k.a Weather Wizard is a villain from The Flash comics and media.

Origin
The Weather Wizard was already a violent criminal before he gained his powers. He had escaped prison and made it to his brother's house, where he discovered that his brother had created a bizarre wand that could control the weather. He wanted this wand so badly, he killed his brother to obtain it.

Powers and Abilities
As the name suggests, the Weather Wizard has the power to control the weather using his wand.