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 forecasters will learn by doing, by making 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 use of proxy-MTG satellite data (e.g., from the NASA MODIS, NOAA VIIRS and Sentinel-3/OLCI instruments) and, once operationally available, real data from MTG in order to prepare forecasters for the use of next-generation satellite data. In addition, a range of state-of-the-art nowcasting tools and numerical weather prediction-based guidance (i.e. from DWD, ZAMG, ESSL, and ECMWF) will be evaluated.