Hurricanes â¢ Hurricanes are classified using the Saffir-Simpson Hurricane Scale. â All hurricanes start as tropical depression then become tropical storms and eventually can become a hurricane. â Once a hurricane it can change categories throughout its lifecycle. â A hurricane can change categories many times during its lifecycle depending on wind speeds. â¢ Hurricane Watches and Warnings â Watches are issued to communities that could see the hurricane arrive in the next 24-36 hours. â Warnings are issued to communities that could see the hurricane in less than 24 hours.