Otto is the 16th named storm of the 2016 Atlantic Hurricane Season and was formed as a Tropical Storm over the southwestern Caribbean Sea near the coast of Panama on 21 November 2016 as an extremely late event in the calendar year. According to the National Oceanic and Atmospheric Administration’s best track database, only 18 storms with at least tropical storm strength formed in late November within the last 65 years in the western Caribbean Sea, and only 9 of them reached Hurricane strength.