Though it is most commonly known as Catarina, all names for this storm are "unofficial", in that it was not named by any hurricane-monitoring meteorological agency affiliated with the World Meteorological Organization (WMO). (Tropical cyclone names are predetermined by an international committee of the WMO.) It has also been unofficially called "Aldonça", and the advisory names for it were "01T-ALPHA" from the United Kingdom's Met Office, and "50L-NONAME" from the United States' National Hurricane Center, which keeps it well outside normal designation, which start at 01L for named storms and use 90L to 99L for invests.