 The depression continued to gradually develop, with a Tropical Cyclone Formation Alert being issued late on November 21 as convection had erupted about the low level circulation centre with bands of convection wrapping around the low level circulation significantly.The depression was then upgraded to a category one tropical cyclone on the Australian Tropical Cyclone Intensity scale early on November 22, with the name "Yani" being assigned.The JTWC also upgraded Yani to a tropical cyclone whilst the cyclone was located approximately 425 km, (265 miles), to the southeast of Honiara, in the Solomon Islands.