GPM Image of Vardah (IMAGE) NASA/Goddard Space Flight Center Caption On Dec. 15, the GPM satellite found thunderstorms south of the low's center were dropping rain at a rate of greater than 156 mm (6.1 inches) per hour. Credit Credits: NASA/JAXA, Hal Pierce 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.