Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Weather Land Data Meteosat Metop Tags Europe AVHRR MSG SEVIRI Africa Metop-A Terra/Aqua MODIS Date 2009 Date January May September December SHOW ALL Sort by Start Date Order Ascending Descending 5 results Case study 22 December 2009 22:00 UTC–23 December 15:00 UTC Strong low level winds in Portugal A rapid cyclogenesis came from the Atlantic and entered Portugal overnight 22-23 December. Case study 23 September 2009 12:00 UTC Backbuilding storms between Tunisia and Sicily The storms which occurred on 23 September between Tunisia and Sicily were interesting from several aspects. Case study 25 May 2009 13:05 UTC Severe storms over Western and Central Europe First major outbreak of thunderstorms in Central Europe in 2009 occurred from 24–26 May. Case study 23 January 2009 00:00 UTC Western Europe hit by worst storm in a decade In January 2009, Western Europe was hit by an extremely severe storm. Case study 9 January 2009 00:00 UTC Very low temperatures & snow across parts of Europe Freezing temperatures, combined with heavy snow in the first 10 days of January 2009.