NASA Sees Strong Convection in Tropical Storm Julia (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption NASA's Aqua satellite captured an infrared image of Tropical Depression 12 early on Sept. 12 when it was just east-southeast of the Cape Verde Islands. At that time it showed strong convection and powerful thunderstorms around its center (purple). By 11 p.m. EDT that day it became Tropical Storm Julia. Warm sea surface temperatures of 80F or higher (orange) surround Julia. 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.