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 Africa MSG SEVIRI Date 2013 Date January 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, South Africa. Case study 17 January 2013 00:00 UTC Tropical low over southern Africa A tropical low began forming over the northern parts of Mozambique on 6 January.