When a tropical low intensifies into a tropical cyclone between 10 ° S and 40 ° S and between 90 ° E and 160 ° E , then it will be named by one of the Tropical Cyclone Warning Centres in Perth , Darwin , or Brisbane .
When a tropical low intensifies into a tropical cyclone between 10 ° S and 40 ° S and between 90 ° E - 160 ° E , then it will be named by one of three Australian national weather service offices in Perth , Darwin , or Brisbane .