The latest was Ellie which was classified as a Category 1 tropical cyclone as it affected Australia.
The Australian region tropical cyclone basin is located to the south of the Equator between 90°E and 160°E.
[1] The basin is officially monitored by the Australian Bureau of Meteorology, Papua New Guinea's National Weather Service as well as Indonesia's Badan Meteorologi Klimatologi dan Geofisika.
[1][3] However, this scale is not officially used in the Australian, however, various agencies including NASA also use it to compare tropical cyclones.
[1] A Category 1 tropical cyclone is expected to cause some damage, if it significantly impacts land at or near its peak intensity.