https://phys.org/news/2018-06-nasa-tropical-depression-05w-approaching.html

NASA's Aqua satellite passed over the South China Sea. On June 4 at 1:30 a.m. EDT (0530 UTC) the Moderate Resolution Imaging Spectroradiometer aboard NASA's Aqua satellite looked at the storm in visible light. The image showed the center of circulation south of Hainan Island. A band of thunderstorms north of the center were already over Hainan Island. Another band of thunderstorms were wrapping into the low level center from the southwest.

By 8 a.m. EDT (1200 UTC) 05W's maximum sustained winds were near 28.7 mph (25 knots). The storm is only expected to slightly intensify, but remain a tropical depression It was centered near 16.4 north latitude and 110.4 east longitude,