NASA AIRS Infrared Image of Tropical Storm Dianne (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption This NASA AIRS infrared image of Tropical Storm Dianne from Feb. 17 at 06:05 UTC (1:05 a.m. EST) shows a large area of strong convection and powerful thunderstorms (purple). Those cloud top temperatures in the strongest thunderstorms were as cold as or colder than -63F/-52C. Credit NASA JPL, Ed Olsen 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.