Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Satellites Weather Meteosat Tags Himawari Terra/Aqua Meteosat Third Generation (MTG) Asia SNPP MODIS VIIRS AHI 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 EUMETSAT Science Blog Frozen Lake Baikal Lake Baikal, the world's oldest and deepest freshwater lake, was still almost completely frozen in Spring 2016. Case study 06 July 2015 02:15 UTC–07 July 02:00 UTC EUMETSAT Science Blog Triple cyclones over northwest Pacific Three tropical cyclones formed in the western Pacific in early July.