Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Atmospheric composition Weather Data Meteosat Tags Asia MSG SEVIRI Date 2009 Date March SHOW ALL Sort by Start Date Order Ascending Descending 1 result Case study 10 March 2009 09:00 UTC Spectacular dust squall over Riyadh On 10 March 2009 one of the worst dust storms in a decade engulfed Riyadh.