风切变
During February 23, the Fiji Meteorological Service reported that Tropical Disturbance 10F, had developed within the monsoon trough about to the west of the Tuvaluan atoll of Funafuti. The system was then located just south of a 250-hPa ridge axis, in a diffluent region. Wind shear and diurnal variations were evidently influencing development. Sea surface temperatures (SST) were around 31 °C.