Although it has been over a year since Superstorm Sandy, Jack still has frequent nightmares about the hurricane and also relives the event in his mind every time there is a thunderstorm. Jack appears to be suffering from a disorder within which DSM-5 category

trauma and stressor-related disorders

Explanation:

Recently, trauma - and stressor-related disorders were considered anxiety disorders. However, they are now considered distinct because many patients do not have anxiety but instead have symptoms of anhedonia or dysphoria, anger, aggression, or dissociation.