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 Meteosat Third Generation (MTG) Himawari MODIS Asia Terra/Aqua SNPP 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.