Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Meteosat Atmospheric composition Weather Data Tags Europe Asia MSG SEVIRI Date 2017 Date January SHOW ALL Sort by Start Date Order Ascending Descending 1 result Case study 1 February 2017 00:00 UTC–2 February 12:00 UTC Colour-changing dust cloud vortex Dust in northern Iraq shows different colours before and after circulation.