The Onset of a Sahelian Storm (1 of 2) (IMAGE) UK Centre for Ecology & Hydrology Caption This is the onset of a Sahelian storm. Credit Françoise GUICHARD/Laurent KERGOAT/CNRS Photo Library 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.