https://phys.org/news/2018-11-weakening-tropical-storm-xavier-nasa.html

The low level center of circulation was located well offshore while the tropical storm's deep convection had been pushed toward Mexico's coast. GPM's Dual-Frequency Precipitation Radar (DPR) revealed that rain was falling at over 9.5 inches (241.3 mm) per hour in some of the powerful convective storms that were located to the northeast of Xavier's low level center of circulation.

At NASA's Goddard Space Flight Center in Greenbelt, Maryland a 3-D image of Xavier's precipitation structure was created from data collected by the GPM core observatory satellite's radar (DPR Ku Band). In the 3-D image, a view from the south shows that less precipitation was occurring in the southern side of the tropical storm. At the same time the strong convective storms north and northeast of Xavier's low level center of circulation are shown reaching altitudes of about 6.9 miles (11.1 km). GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.