GPM's Instruments Measured Rain Falling at a Rate of 50 mm per Hour! (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption On July 27 at 12:31 p.m. PDT, GPM's instruments measured rain falling at a rate of 50 mm (almost 2 inches) per hour (in red) in storms near the center of the tropical depression. Credit NASA/JAXA/SSAI, Hal Pierce Usage Restrictions None Share Print E-Mail 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.