Infrared Image of Tropical Storm Roke (IMAGE) NASA/Goddard Space Flight Center Caption This infrared image of Tropical Storm Roke was captured on Sept. 14 at 10:41 p.m. EDT. The purple area around the center of circulation indicates the coldest, highest cloud heights, where the heaviest rain was occurring. The orange indicates warm sea surface temperatures over 80F that are allowing Roke to intensify. 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.