Mark Mardon

Mark Mardon was the brother of the late Clyde Mardon. After the S.T.A.R. Labs particle accelerator erupted, his plane went down. It is unknown if he survived and gained any powers like his brother.

Biography
In early 2014, Mark robbed a bank with his brother, Clyde. They drove off in a Mustang Shelby GT 500 (as later observed by Barry Allen), leaving for a farmhouse. After Barry was able to track the Mardon brothers down to one of four farms, Detectives West and Chyre both checked one each. Having little luck on the first three, on the final one they found Clyde. He shot Chyre, running to catch a plane with his brother. As they flew away, the S.T.A.R. Labs particle accelerator exploded, causing the plane to blow up. His brother made it out relatively unharmed, though it's unknown whether Mark survived.

Trivia

 * In the DC comics, Mark Mardon is better known as Weather Wizard, a mantle which his brother took on the show.