 After the system dissipated, the BOM de-classified Isobel as a tropical cyclone as post-storm analysis showed that it did not have a well enough defined center to qualify as a tropical cyclone.On 30 January, a tropical low was identified by the Tropical Cyclone Warning Centre in Darwin.It deepened as it moved east just north of the Northern Territory coastline and a cyclone watch was declared for eastern parts of the Northern Territory on 31 January.