GPM Video of Bill (video) NASA/Goddard Space Flight Center Share Print E-Mail Loading video... Caption Data from the NASA's GPM IMERG was used in this analysis to estimate rainfall from Tropical Storm Bill from June 15 to 18, 2015. Rainfall from tropical Storm Bill was spreading over Oklahoma. Credit Credits: 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.