The Origin of Storms is where it is believed that highstorms begin, located in the east of Roshar, across the Ocean of Origins (presumably named after it). Due to the frequent highstorms, no one has ever sailed there and returned alive to tell the tale. (Kaladin's father said the same.)
Few ships ever leave this coast because being caught on the seas during a storm, according to the stories, means death.
In the story of Derethil and the Wandersail (told by Hoid to Kaladin), Derethil (a king from the time of the Heraldic Epochs) thought there was another Origin to the west; the Origin of the Voidbringer.