NASA Infrared Image of Hubert (IMAGE) NASA/Goddard Space Flight Center Caption NASA's AIRS instrument captured this infrared view of Hubert's frigid clouds, seen here in blue and purple. Purple indicates high and strong thunderstorms with cloud-top temperatures as cold is -63 Fahrenheit. Credit NASA JPL, Ed Olsen 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.