GPM Image of Potential Tropical Cyclone 9 (IMAGE) NASA/Goddard Space Flight Center Caption The GPM core satellite passed over developing Potential Tropical Cyclone 9 on Sept. 13 at 2:26 a.m. EDT (0726 UTC). GPM found the heaviest rainfall (pink) northwest of the center where it was falling at a rate of over 40 mm (about 1.6 inch) per hour. Lighter rainfall rates (yellow and blue) were measured throughout the rest of the storm. Credit NASA/JAXA/NRL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.