Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Metop Climate Land Weather Data Meteosat Tags Europe SNPP ASCAT AVHRR Meteosat Second Generation (MSG) SEVIRI Africa Metop-A Metop-B EPS Asia SW Pacific VIIRS Date 2013 Date November December SHOW ALL Sort by Start Date Order Ascending Descending 2 results Case study Jan–December 2014 Image Library top ten for 2014 A look at our most popular images and case studies from 2014. Case study 6 November 2013 10:30–14:30 UTC Distrails over Central Europe A distrail, short for dissipation trail, forms when an aircraft flies through a supercooled cloud.