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 Meteosat Weather Tags Himawari Terra/Aqua MODIS VIIRS AHI Meteosat Third Generation (MTG) Asia SNPP Date 2016 Date March SHOW ALL Sort by Start Date Order Ascending Descending 1 result 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.