https://phys.org/news/2018-09-nasa-hurricane-helene-africa.html

On Sept. 10 from the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite showed an organized storm with a thick band of powerful thunderstorms circling the eye.

The National Hurricane Center noted at 11 a.m. EDT on Sept. 10, "Helene's cloud pattern has become much better organized during the past few hours, with a clear 20 nautical miles wide eye seen in Meteosat infrared imagery