sentences:  Over the next couple of days the system gradually developed and before it was declared as a tropical disturbance early on March 1.At this time convection detached from the disturbance's low level circulation center, whilst vertical wind shear around the system remained weak.Early the next day, the Disturbance was then relocated to the northwest of Viti Levu in Fiji, before it was designated as Tropical Depression 13F later that day.