Infrared Imagery of Tropical Storm Sandy (IMAGE) NASA/Goddard Space Flight Center Caption The AIRS instrument aboard NASA's Aqua satellite captured infrared imagery of Tropical Storm Sandy on Oct. 23 at 2:47 p.m. EDT that showed the strongest thunderstorms (purple) surrounded the center of circulation. Those thunderstorms are reaching high into the troposphere where cloud top temperatures are as cold as -63 Fahrenheit (-52 Celsius). 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.