Complex sentence: Over the next few days as the low drifted towards the west, the systems low level circulation centre gradually developed further while drifting towards the west, before late on 30 October, the JTWC started warning on the low as Tropical Cyclone 02S.
Split into simpler sentences: Over the next few days as the low drifted towards the west, the system's low level circulation centre gradually developed further. Before late on 30 October, the JTWC started issuing advisories on the low as Tropical Cyclone 02S.