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 SEVIRI Asia SNPP VIIRS Meteosat Second Generation (MSG) Africa Date 2016 Date April December SHOW ALL Sort by Start Date Order Ascending Descending 2 results Case study 24 December 2016 03:00 UTC–4 January 2017 03:00 UTC Lingering fog over the Arabian Peninsula From 24 December and for more than 10 days, a thick fog invaded the Arabian Gulf countries resulting in limited night-morning visibility. Case study 12 April 2016 00:00 UTC–18 April 13:30 UTC Tropical Cyclone Fantala Tropical Cyclone Fantala showed a very clearly defined eye as the storm reached Category 5 level in mid-April.