Summary: Hurricane categories range from 1 (76 mile-an-hour winds) to 5 (174 mph and up). There is no Category 6, not even for record breaking storms like Irma. A few headlines and memes are going around saying that Irma is a Category 6 storm, or that it should be a Category 6 storm, or that there will soon be a Category 6, as if meteorologists are gathered around tables in some secret meteorologist lair waiting for the exact right moment to add a new category to the Saffir-Simpson scale.
