Aqua image of Sebastien (IMAGE) NASA/Goddard Space Flight Center Caption On Nov. 25 at 0400 UTC (Nov. 24 at 11 p.m. EST) the MODIS instrument that flies aboard NASA's Aqua satellite revealed that Extra-tropical cyclone Sebastien's strongest storms had cloud tops as cold as or colder than minus 50 degrees Fahrenheit (minus 45.5 Celsius). Credit Credit: NASA/NRL 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.