Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Land Meteosat Weather Data Tags MSG SEVIRI Africa Europe Date 2013 Date November SHOW ALL Sort by Start Date Order Ascending Descending 2 results Case study 28 November 2013 09:00–18:00 UTC Massive hailstorm over Gauteng, South Africa Severe thunderstorms with golf ball size hail and flash floods hit Gauteng province of South Africa in late November. Case study 18 November 2013 09:00–16:00 UTC Severe thunderstorms over Sardinia Flash floods caused by heavy thunderstorms tear through streets in Sardinia, submerging homes and killing at least 18 people.