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 Satellites Weather Tags Meteosat Third Generation (MTG) Himawari Terra/Aqua MODIS AHI Asia SNPP VIIRS Date 2016 2015 SHOW ALL Sort by Start Date Order Ascending Descending 2 results Case study 19 March 2016 00:00–09:00 UTC and 22 April 05:42 UTC Frozen Lake Baikal Lake Baikal, the world's oldest and deepest freshwater lake, was still almost completely frozen in Spring 2016. Case study 6 July 2015 02:15 UTC–7 July 02:00 UTC Triple cyclones over northwest Pacific Three tropical cyclones formed in the western Pacific in early July.