Suomi NPP image of Iselle (IMAGE) NASA/Goddard Space Flight Center Caption On Aug. 27 at 5:30 a.m. EDT (0930 UTC) the VIIRS instrument that flies aboard NASA-NOAA's Suomi NPP satellite revealed the most powerful thunderstorms (red) with cloud top temperatures as cold as minus 70 degrees Fahrenheit (minus 56.6. degrees Celsius) were west of the center and also dropping large amounts of rain. Credit NASA/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.