ESSL and EUMETSAT organise a series of testbeds to prepare forecasters for data from next-generation Meteosat Third Generation (MTG) and Metop Second Generation (Metop-SG) satellites. These testbeds are organized both to teach forecasting severe convective storms using state-of-the-art or even experimental forecasting tools, and to evaluate such tools. At these events we will learn by doing, by making experimental severe weather forecasts and nowcasts using a mix of new nowcasting and forecasting tools, followed by a verification. Particular focus will be given to the capabilities of the VIIRS instrument on polar-orbiting satellites, which serves as a proxy for MTG’s FCI instrument, and other proxy data for MTG instruments. In addition, a range of state-of-the-art nowcasting tools and numerical weather prediction-based guidance from DWD, ZAMG, ESSL, and ECMWF will be evaluated.