China Meteorological Administration
The China Meteorological Administration (CMA) and Hong Kong Observatory both identified a tropical depression in the southern South China Sea on September 22. The system was organized enough to be classified as Tropical Depression 17W by the JTWC the next day. It weakened under heavy vertical wind shear and the JTWC issued its final advisory on Tropical Depression 17W before landfall in Vietnam. The storm passed just south of Hainan and brought heavy rain to the area. The maximum rainfall recorded was 143 mm. CMA kept it as a tropical storm until it made landfall in Vietnam in the morning of September 25.