Category 1 is the lowest classification on the Australian tropical cyclone intensity scale and is used to classify tropical cyclones, that have 10-minute sustained winds of 33–47 knots (61–87 km/h; 38–54 mph).
[1] The basin is officially monitored by the Fiji Meteorological Service and the New Zealand MetService, while other meteorological services such as the Australian Bureau of Meteorology, Météo-France as well as the United States Joint Typhoon Warning Center also monitor the basin.
[1][2] A named storm could also be classified as a Category 1 tropical cyclone if it is estimated, to have 1-minute mean maximum sustained wind speeds of between 64–82 knots (119–152 km/h; 74–94 mph) on the Saffir–Simpson hurricane wind scale.
[1][3] This scale is only officially used in American Samoa, however, various agencies including NASA also use it to compare tropical cyclones.
[1] A Category 3 tropical cyclone is expected to cause catastrophic devastation, if it significantly impacts land at or near its peak intensity.