Mark Mardon

"Yeah, Clyde was no saint, but he was family. If you can't protect your family, the least you can do is avenge 'em."

- Mark to Joe West about the reasoning of his action

Mark Mardon, nicknamed Weather Wizard by Cisco Ramon, is the older brother of the late Clyde Mardon. After the S.T.A.R. Labs particle accelerator erupted, Mark was affected by the dark matter wave the same way as his brother, gaining the ability to control the weather. Over a year later, Mark was imprisoned in the S.T.A.R. Labs Pipeline by The Flash, but was freed by Leonard Snart and Lisa Snart along with the rest of the imprisoned meta-humans, and left with Roy Bivolo to become a member of the Rogues.

Early life
Mark had been taking care of his brother, since Clyde was 10 years old. At some point in his life, Mark along with his brother Clyde, became bank robbers. At some point Mark and Clyde robbed a bank and Mark shot Patty Spivot's father in the face for a few hundred dollars.

In late 2013, Mark and Clyde robbed two banks in a single week; during the second robbery, Clyde shot and killed a security guard. Although the Mardon brothers got away, they also left enough evidence for the Central City Police Department to pursue. Barry Allen managed to deduct that they drove off in a Mustang Shelby GT 500 and used a farmhouse as a hideout. After Barry narrowed down the possible whereabouts to four farms, Detectives West and Chyre headed together to check on each one. Eventually, at the final location, they found Clyde, who shot Chyre while running to catch the getaway plane Mark was piloting. As they flew away, the S.T.A.R. Labs particle accelerator exploded and interacted with the ongoing storm, causing a lighting to directly hit the plane and blowing it up. His brother made it out relatively unharmed, though Mark's status had been unknown and generally presumed as deceased for over a year.

Vengeance on Joe West
It was much later revealed that Mark did survive the S.T.A.R. Labs particle accelerator explosion/the plane crash and had gained the same powers as his late brother, only that unlike Clyde, Mark broke almost every bone in his body during the incident, explaining his long absence. Upon learning the death of his brother, Mark returned to Central City to get revenge for Clyde's death. He first went to the Central City Morgue and asked the coroner the name of the cop who shot his brother; when the coroner refused to answer, Mark then tortured him with the form of hailing, using his weather powers. By the time the coroner finally caved in and told him Joe West was the one responsible, Mark promptly killed the battered informant. Some time later, Joe and Barry Allen were driving when Mark sent a bolt of lightning down on them from the truck behind them in an attempt to kill Joe. Barry managed to run Joe to safety just in time. Mardon later confronted Joe in the Central City Police Department and once again attempted to kill him with lightning. However, he was stopped when The Flash and used the Wizard's Wand on him, but Mardon still managed to escape.

Joe and Eddie Thawne headed to one of the Mardon brothers's old hideouts, but Mark anticipated their arrival and kidnapped Joe using a gust of wind. He brought him to the pier and bound and gagged him before creating a tsunami to wipe out Central City, making Joe watch the whole time. However, the tsunami was dissipated by Barry, who was forced to run so fast that he traveled back in time, effectively erasing the events of the past few days.

With his future knowledge, Barry found Mark at his apartment and took him to the Pipeline at S.T.A.R. Labs, with him threatening to destroy the city with a tidal wave the whole time, effectively preventing Mark's future actions.

Time in the Pipeline
During his first night in the Pipeline, Mark grew unhappy at Cisco Ramon's choice of The Goonies for movie night, and he and the other metas voted to instead watch the film Mean Girls. Mark also requested that Cisco place half a bottle of bourbon on his brother's grave on Clyde's birthday.

Escape from the Pipeline
After being sedated by having knockout gas sprayed in his cell, Mark was moved out of STAR Labs in a truck with the other meta-humans. He and the other metas awoke and began squabbling, with him in particular picking a fight with Kyle Nimbus. However, Leonard and Lisa Snart sabotaged the truck, and Mark and the others escaped, with him striking down the plane meant to take the metas to Lian Yu with a lightning bolt.

In the ensuing battle, Mark used his powers to hit the Flash with another lightning bolt, knocking him to the ground. He and Roy Bivolo approached Flash as Jake Simmons was about to kill him, but Simmons was killed by Leonard. Mark and Bivolo prepared to face Leonard only to have a gun pointed at them by Lisa but Leonard didn't kill them but reminded them who saved them, and the two metas left together. Leonard then explained that he allowed them to escape in order to recruit them into the Rouges.

Working with the Trickster
5 months later During the midst of the holiday season for Central City, Mark created a snowstorm and attacked Iron Heights, freeing Leonard Snart (Captain Cold) and the Trickster (James Jesse). After escaping the prison, Mark brought them to an abandoned toy factory and try to convince them to help him kill the Flash, confident in their numbers, different skills, and knowledge of Barry's vicious defeat at Zoom's hands, leading him to believe the Scarlet Speedster is weak and vulnerable. Leonard (perhaps owing Barry after the latter saved his sister) decided to step out, instead choosing to warn Barry of their plans for the Flash.

After Mark creates a storm so that Team Flash can detect him, Barry races over to a rooftop where Mark is calmly waiting on the edge. Mark plays around with the Flash, asking Barry if he should either create a hailstorm or acid rain. Barry rejects both ideas and is about to use the Wand when Mark steps back from the edge and falls down. Surprised, Flash looks over just in time to see him flying, creating air drafts to keep him aloft. The Flash chases after him, with Mark gliding ahead but then Barry catches up and uses the Wand, causing Mark to crash to the ground.

Just when Barry believed it was over, The trickster throws a box over, declaring that identical boxes containing bombs are throughout the city under almost 100 different Christmas trees. Mark tells Barry that he will stand there and let them publicly humiliate and kill him or else all the bombs go off, killing innocent people. Barry, not wanting to hurt anyone, hands over the Wand, and allows himself to be subjected to torture by Mark. Mardon throws hail, shoots him up in the air with wind, and strikes him with lightning using the Wand. As The Trickster moves in to slit his throat and finally kill Barry, Jay, Harry, and Cisco managed to get rid of the bombs, allowing Flash to tie up Trickster and take the Wand back from Mark and power The Weather Wizard down. Patty arrives, and was about to kill him as vengeance for her father but with some convincing from Barry, decided to arrest him instead.

Personality
Unlike Clyde, Mark is the more mature and sensible of the two siblings. His anger is mostly fueled by a desire for vengeance but he does not bear the inherent psychological mindset of a killer as his first inclination is not towards killing. That said - this does not negate his capacity for cruelty under incendiary circumstances. He appears to be aggressive and confrontational with anyone he meets, such as attempting to pick a fight with Kyle Nimbus for no apparent reason.

In his quest for revenge - he wanted Joe West to suffer first - such that he created a tsunami with his weather powers to destroy Central City and to kill Joe's daughter, Iris, so that he would know the immense pain of grief which Mark felt upon losing his brother.

Mark loved his brother very much and was devastated by Clyde's death as well as upset with himself about his inability to protect him, for Mark felt it was his responsibility to look after Clyde. He, however, did not let his love for Clyde bias his judgment and make excuses for his late brother's behavior; Mark was sane enough to fully acknowledge it was indeed flawed. He is also has a confident air on him, believing that working with a team can defeat the Flash and even when Patty held him at gun point, he laughed and told her she didn't have it in her to shoot him.

Powers

 * Atmokinesis: After he was caught in the particle accelerator's explosion's shock-wave, Mark gained the power to create and manipulate the weather. However, unlike Clyde, Mark's new-found powers are far more precise and potent, allowing him to miniaturize his weather to any size, to the point were he could create a small tornado on his palm, as well as have full control of the shape and form of his weather. He is also able to control it indoors and likewise able to affect a much larger radius than his late brother. He created tennis-ball sized hailstones to attack the Central City coroner in the morgue, summoned a devastating lightning strike inside the police precinct that put Captain Singh in critical condition in the hospital, and created a massive tidal wave that potentially would have destroyed Central City had it made landfall. He also was able to create a snowstorm and use it to attack Iron Heights.
 * Electrokinesis: Can create and summon lightning and other electrical phenomena, even being able to hold it in his hand and aim it at a target.
 * Aerokinesis: Mark can create powerful air currents, as well as storm clouds tornados, at any size. He could create small windstorms from his hands and use them as weapons. He can effortlessly throw someone aside using wind.
 * Flight: By creating drafts of wind underneath him, Mark can keep himself aloft and fly through the air at considerable speeds.
 * Thermokinesis: Mark can control the temperature with his mind.
 * Cryokinesis: Mark can freeze air molecules and create destructive balls of ice.

Skills

 * Skilled pilot: Mark is capable of flying airplanes.
 * Intimidation/Interrogation/Torture: Mark managed to torture the coroner with no trouble, and intimidated him enough for him to reveal that it was Joe West that killed Clyde.

Weaknesses

 * Wizard's Wand: The wand sucks in Mark's powers by neutralizing the surrounding particles that he could use to create weather. However, the wand can also be used offensively by Mark to channel his powers through.

Trivia

 * In a currently erased timeline Mark almost succeeded in destroying Central City with a tsunami as part of his revenge against Joe West but because Barry Allen changed the time continuum, Mark never got the chance. However when caught Mark declared his intention to go through his his plot, unaware of his previous actions.
 * In a deleted scene, Caitlin tells Barry that everyday in the Pipeline, Mark orders Thai food.

Behind the scenes

 * In the DC comics, Mark Mardon is better known as Weather Wizard, a mantle which his brother, despite having powers based on Weather Wizard, did not take on the show.