Contact: Rob Gutro
NASA/Goddard Space Flight Center
Caption: This image of System 99P was captured on April 20, 2012 at 04:55 UTC (12:55 a.m. EDT) by the MODIS instrument onboard NASA's Aqua satellite. It was centered about 190 nautical miles north-northeast of Darwin, Australia, and showed some areas of strong thunderstorms west of its center of circulation.
Credit: NASA Goddard MODIS Rapid Response
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Related news release: NASA sees slow-developing System 99P dogging Northern Australia